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Diagnostic Trouble Code Definitions

NOTE: Prior to performing any system test, see HOW TO USE SYSTEM TESTS  under SYSTEM TESTS. If instructed to replace Powertrain Control Module (PCM) after performing a system test, new PCM must be programmed. See PROGRAMMING PCM .

If a DTC appears with an "x" in the numerator (example DTC P071x), "x" denotes any number between 0-9. If a "P" series DTC appears that is not listed in DIAGNOSTIC TROUBLE CODE DEFINITIONS, diagnose by symptom in TROUBLE SHOOTING - NO CODES - EEC-V (GASOLINE) article for symptom diagnosis. On some models, PCM is capable of storing some body DTCs. If any "B", "C" or "U" series DTCs are retrieved (example DTC B1213, C1702 or U2195), go to appropriate MODULE COMMUNICATIONS NETWORK article in ACCESSORIES & EQUIPMENT to determine test to perform.

DIAGNOSTIC TROUBLE CODE (DTC) DEFINITION

Diagnostic Trouble Code (DTC) Definition (1)KOEO (1)KOER (1)Continuous
P0102 Mass Air Flow (MAF) Circuit Low Input --  DC2  DC2
P0103 Mass Air Flow (MAF) Circuit High Input  DC20  DC20  DC20
P0106 Barometric (BARO) Pressure Sensor Circuit Performance -- --  DQ1
P0107 BARO Sensor Low Voltage Detected -- --  DQ1
P0108 BARO Sensor High Voltage Detected -- --  DQ1
P0109 BARO Sensor Circuit Intermittent -- --  DQ1
P0112 Intake Air Temperature (IAT) Circuit Low Input  DA20  DA20  DA90
P0113 Intake Air Temperature (IAT) Circuit High Input  DA10  DA10  DA90
P0117 (W/O ECT Sensor) Engine Coolant Temperature (ECT) Circuit Low Input  DL20  DL20  DL90
P0117 (All Others) Engine Coolant Temperature (ECT) Circuit Low Input  DA20  DA20  DA90
P0118 (W/O ECT Sensor) Engine Coolant Temperature (ECT) Circuit High Input  DL10  DL10  DL90
P0118 (All Others) Engine Coolant Temperature (ECT) Circuit High Input  DA10  DA10  DA90
P0121 Throttle Position (TP) Circuit Performance Problem --  DH22  DH22
P0122 Throttle Position (TP) Circuit Low Input  DH11  DH11  DH11
P0123 Throttle Position (TP) Circuit High Input  DH8  DH8  DH8
P0125 Insufficient Coolant Temperature For Closed Loop Fuel Control -- --  DA100
P0127 (5.4L Lightning) Intake Air Temperature Too High  DU30  DU30  DU30
P0131 HO2S Sensor Circuit Out of Range Low Voltage (HO2S-11) -- --  H27
P0133 HO2S Sensor Circuit Slow Response (HO2S-11) -- --  H20
P0135 (Natural Gas) HO2S Sensor Circuit Malfunction (HO2S-11)  HA30  HA30  HA30
P0135 (All Others) HO2S Sensor Circuit Malfunction (HO2S-11)  H30  H30  H30
P0136 HO2S Sensor Circuit Malfunction (HO2S-12) -- --  H80
P0141 (Natural Gas) HO2S Sensor Circuit Malfunction (HO2S-125)  HA30  HA30  HA30
P0141 (All Others) HO2S Sensor Circuit Malfunction (HO2S-125)  H30  H30  H30
P0151 HO2S Sensor Circuit Out of Range Low Voltage (HO2S-21) -- --  H27
P0153 HO2S Sensor Circuit Slow Response (HO2S-21) -- --  H20
P0155 (Natural Gas) HO2S Sensor Circuit Malfunction (HO2S-21)  HA30  HA30  HA30
P0155 (All Others) HO2S Sensor Circuit Malfunction (HO2S-21)  H30  H30  H30
P0156 HO2S Sensor Circuit Malfunction (HO2S-22) -- --  H80
P0161 (Natural Gas) HO2S Sensor Circuit Malfunction (HO2S-22)  HA30  HA30  HA30
P0161 (All Others) HO2S Sensor Circuit Malfunction (HO2S-22)  H30  H30  H30
P0171 (Natural Gas) System too Lean (Bank 1) -- --  HA41
P0171 (All Others) System too Lean (Bank 1) -- --  H41
P0172 (Natural Gas) System too Rich (Bank 1) -- --  HA41
P0172 (All Others) System too Rich (Bank 1) -- --  H41
P0174 (Natural Gas) System too Lean (Bank 2) -- --  HA41
P0174 (All Others) System too Lean (Bank 2) -- --  H41
P0175 (Natural Gas) System too Rich (Bank 2) -- --  HA41
P0175 (All Others) System too Rich (Bank 2) -- --  H41
P0176 Flex Fuel (FF) Sensor --  DE1  DE20
P0180 Engine Fuel Temperature (EFT) Sensor  DB2  DB2  DB8
P0181 Engine Fuel Temperature (EFT) Sensor  DB1  DB1 --
P0182 (Natural Gas) Engine Fuel Temperature (EFT) Sensor  DB2  DB2  DB8
P0183 Engine Fuel Temperature (EFT) Sensor  DB2  DB2  DB7
P0190 Fuel Rail Pressure Sensor Circuit Malfunction (FRP)  DD11  DD11  DD15
P0191 Fuel Rail Pressure Sensor Circuit Performance (FRP)  DD16  DD16  DD16
P0192 Fuel Rail Pressure Sensor Circuit Low Input (FRP)  DD1  DD1  DD15
P0193 Fuel Rail Pressure Sensor Circuit High Input (FRP)  DD7  DD7  DD15
P0201 Cylinder No. 1 Injector Circuits  H56  H56  H56
P0202 Cylinder No. 2 Injector Circuits  H56  H56  H56
P0203 Cylinder No. 3 Injector Circuits  H56  H56  H56
P0204 Cylinder No. 4 Injector Circuits  H56  H56  H56
P0205 Cylinder No. 5 Injector Circuits  H56  H56  H56
P0206 Cylinder No. 6 Injector Circuits  H56  H56  H56
P0207 Cylinder No. 7 Injector Circuits  H56  H56  H56
P0208 Cylinder No. 8 Injector Circuits  H56  H56  H56
P0209 Cylinder No. 9 Injector Circuits  H56  H56  H56
P0210 Cylinder No. 10 Injector Circuits  H56  H56  H56
P0211 Cylinder No. 11 Injector Circuits  H56  H56  H56
P0212 Cylinder No. 12 Injector Circuits  H56  H56  H56
P0217 (5.4L Lightning) Engine Coolant Over-Temperature Condition  DL100  DL100  DL100
P0230 (Natural Gas) Fuel Pump Primary Circuit Malfunction  KC1  KC1  KC40
P0230 (All Others) Fuel Pump Primary Circuit Malfunction  KA1  KA1  KA40
P0231 (Natural Gas) Fuel Pump Secondary Circuit Low  KC20  KC20  KC35
P0231 (All Others) Fuel Pump Secondary Circuit Low  KA20  KA20  KA35
P0232 (Natural Gas) Fuel Pump Secondary Circuit High  KC10  KC10  KC30
P0232 (All Others) Fuel Pump Secondary Circuit High  KA10  KA10  KA30
P0234 (5.4L Lightning) Fuel Pump Secondary Circuit High  KJ1  KJ1  KJ1
P0243 (5.4L Lightning) Fuel Pump Secondary Circuit High  KJ6  KJ6  KJ6
P0298 (LS) Engine Oil Over Temperature Condition -- --  DA130
P0300 Random Misfire --  HD1  HD1
P0301 Misfire Detection Monitor --  HD1  HD1
P0302 Misfire Detection Monitor --  HD1  HD1
P0303 Misfire Detection Monitor --  HD1  HD1
P0304 Misfire Detection Monitor --  HD1  HD1
P0305 Misfire Detection Monitor --  HD1  HD1
P0306 Misfire Detection Monitor --  HD1  HD1
P0307 Misfire Detection Monitor --  HD1  HD1
P0308 Misfire Detection Monitor --  HD1  HD1
P0309 Misfire Detection Monitor --  HD1  HD1
P0310 Misfire Detection Monitor --  HD1  HD1
P0320 Ignition Diagnostic Monitor (IDM) NC1 --  NC1
P0325(2) Knock Sensor 1 Circuit Malfunction (Bank 1) --  DG15  DG15
P0325 (All Others) Knock Sensor 1 Circuit Malfunction (Bank 1) --  DG1  DG1
P0326(2) Knock Sensor 1 Circuit Malfunction (Bank 1) --  DG15  DG15
P0326 (All Others) Knock Sensor 1 Circuit Malfunction (Bank 1) --  DG1  DG1
P0330(2) Knock Sensor 2 Circuit Malfunction (Bank 2) --  DG15  DG15
P0330 (All Others) Knock Sensor 2 Circuit Malfunction (Bank 2) --  DG1  DG1
P0331(2) Knock Sensor 2 Circuit Range/performance (Bank 2) --  DG15  DG15
P0331 (All Others) Knock Sensor 2 Circuit Range/performance (Bank 2) --  DG1  DG1
P0340 Camshaft Position (CMP) Sensor Circuit Malfunction --  DR1  DR1
P0350 Ignition Coil (Undetermined) Primary/ Secondary Circuit Malfunction --  JB1  JB1
P0351 (With Coil Pack) Ignition Coil A through J Primary/ Secondary Circuit Malfunction --  JE1  JE1
P0351 (With Coil-On-Plug) Ignition Coil A through J Primary/ Secondary Circuit Malfunction --  JF1  JF1
P0352 (With Coil Pack) Ignition Coil A through J Primary/ Secondary Circuit Malfunction --  JE1  JE1
P0352 (With Coil-On-Plug) Ignition Coil A through J Primary/ Secondary Circuit Malfunction --  JF1  JF1
P0353 (With Coil Pack) Ignition Coil A through J Primary/ Secondary Circuit Malfunction --  JE1  JE1
P0353 (With Coil-On-Plug) Ignition Coil A through J Primary/ Secondary Circuit Malfunction --  JF1  JF1
P0354 (With Coil Pack) Ignition Coil A through J Primary/ Secondary Circuit Malfunction --  JE1  JE1
P0354 (With Coil-On-Plug) Ignition Coil A through J Primary/ Secondary Circuit Malfunction --  JF1  JF1
P0355 Ignition Coil A through J Primary/ Secondary Circuit Malfunction --  JF1  JF1
P0356 Ignition Coil A through J Primary/ Secondary Circuit Malfunction --  JF1  JF1
P0357 Ignition Coil A through J Primary/ Secondary Circuit Malfunction --  JF1  JF1
P0358 Ignition Coil A through J Primary/ Secondary Circuit Malfunction --  JF1  JF1
P0359 Ignition Coil A through J Primary/ Secondary Circuit Malfunction --  JF1  JF1
P0360 Ignition Coil A through J Primary/ Secondary Circuit Malfunction --  JF1  JF1
P0401 EGR Flow Insufficient Detected -- --  HE70
P0402 EGR Flow Excessive Detected --  HE20  HE20
P0411 Secondary Air Injection (AIR) system upstream flow  HM7  HM7  HM7
P0412 Secondary Air Injection System (AIR) circuit malfunction  HM1  HM1  HM1
P0420 Catalyst System Efficiency Below Threshold (Bank 1) -- --  HF1
P0430 Catalyst System Efficiency Below Threshold (Bank 2) -- --  HF1
P0442 EVAP Control System Leak Detected (Small Leak) -- -- (3)
P0443 EVAP Control System Canister Purge Valve Circuit Malfunction  HX2  HX2  HX1
P0451 FTP Sensor Circuit Noisy -- --  Z1
P0452 FTP Sensor Circuit Low Voltage Detected  HX26  HX26  HX26
P0453 FTP Sensor Circuit High Voltage Detected  HX33  HX33  HX33
P0455 EVAP Control System Leak Detected (No Purge Flow or Large Leak) -- -- (3)
P0456 EVAP Control System Leak Detected (Very Small Leak) -- -- (3)
P0457(4) EVAP Control System Leak Detected (Fuel Filter Cap Loose/Off) -- --  HX43
P0460 Fuel Level Sensor Circuit Malfunction  HX76  HX76  HX76
P0461 Fuel Level Sensor Circuit Range/Performance -- --  Z1
P0500(5) Vehicle Speed Sensor (VSS) Malfunction -- --  DP5
P0500(6) Vehicle Speed Sensor (VSS) Malfunction (7) (7) (7)
P0500(8) Vehicle Speed Sensor (VSS) Malfunction -- --  DF1
P0500 (All Others) Vehicle Speed Sensor (VSS) Malfunction -- --  DP1
P0501(5) Vehicle Speed Sensor (VSS) Range/ Performance -- --  DP5
P0501(6) Vehicle Speed Sensor (VSS) Range/ Performance -- -- (7)
P0501(8) Vehicle Speed Sensor (VSS) Range/ Performance -- --  DF1
P0501(9) Vehicle Speed Sensor (VSS) Range/ Performance -- --  DP30
P0501 (All Others) Vehicle Speed Sensor (VSS) Range/ Performance -- --  DP1
P0503 Vehicle Speed Sensor (VSS) Intermittent -- --  DP20
P0505 Idle Air Control System Malfunction --  KE2 --
P0552 Power Steering Pressure (PSP) Sensor Circuit Malfunction  DT2  DT2  DT10
P0553 Power Steering Pressure (PSP) Sensor Circuit Malfunction  DT2  DT2  DT10
P0602 Control Module Programming Error (10) (10) (10)
P0603 Powertrain Control Module KAM Test Error  QB1 -- --
P0605 PCM Read Only Memory (ROM) error Replace PCM(11) Replace PCM(11) Replace PCM(11)
P0703(12) Brake Switch Circuit Input Malfunction  FD2  FD1 --
P0703 (All Others) Brake Switch Circuit Input Malfunction  FD2  FD1  FD3
P0704(13) Clutch Pedal Position Switch Malfunction  TA1 --  TA1
P0704 (All Others) Clutch Pedal Position Switch Malfunction  TA5 --  TA5
P0705 -- (14) (14) (14)
P0707 -- -- -- (14)
P0708 -- (14) (14) (14)
P071x -- (14) (14) (14)
P072x (Auto Trans.) Insufficient input from Output Shaft Speed sensor -- -- (14)
P072x (Manural Trans.) Insufficient input from Output Shaft Speed sensor -- --  TJ1
P073x -- -- -- (14)
P074x -- (14) (14) (14)
P075x -- (14) (14) (14)
P076x -- (14) (14) (14)
P077x -- -- -- (14)
P078x -- -- -- (14)
P079x -- (14) (14) (14)
P0812 -- -- --  TH1
P0813 -- -- -- (14)
P0815 -- -- -- (14)
P0840 Transmission Fluid Pressure Sensor/Switch "A" Circuit (14) (14) (14)
P1000 Monitor Testing Not Complete (15) (15)  QC1
P1001 KOER Not Able To Complete, KOER Aborted --  QA1 --
P1100 Mass Air Flow (MAF) Sensor Intermittent -- --  DC16
P1101 Mass Air Flow (MAF) Sensor Out of Self-Test Range  DC3  DC1 --
P1112 Intake Air Temperature (IAT) Sensor Intermittent -- --  DA90
P1114 (5.4L Lightning) Intake Air Temperature (IAT) Sensor Intermittent  DU20  DU20  DU20
P1115 Intake Air Temperature (IAT) Sensor Intermittent  DU10  DU10  DU10
P1116 (W/O ECT Sensor) Engine Coolant Temperature (ECT) Sensor Out of Self-Test Range  DL1  DL1 --
P1116 (All Others) Engine Coolant Temperature (ECT) Sensor Out of Self-Test Range  DA1  DA1 --
P1117 (W/O ECT Sensor Engine Coolant Temperature (ECT) Sensor Intermittent -- --  DL90
P1117 (All Others) Engine Coolant Temperature (ECT) Sensor Intermittent -- --  DA90
P1120 Throttle Position (TP) Sensor Out of Range Low (RATCH too Low)  DH3  DH3  DH3
P1121 Throttle Position (TP) Sensor Inconsistent with MAF Sensor --  DH15  DH15
P1124 Throttle Position (TP) Sensor Out of Self-Test Range  DH1  DH1 --
P1125 Throttle Position (TP) Sensor Intermittent -- --  DH20
P1127 (Natural Gas) Exhaust Not Warm Enough, Downstream Sensor Not Tested --  HA90 --
P1127 (All Others) Exhaust Not Warm Enough, Downstream Sensor Not Tested --  H100 --
P1128 (Natural Gas) Upstream Oxygen Sensors Swapped from Bank to Bank (HO2S-11-21) --  HA100 --
P1128 (All Others) Upstream Oxygen Sensors Swapped from Bank to Bank (HO2S-11-21) --  H110 --
P1129 (Natural Gas) Downstream Oxygen Sensors Swapped from Bank to Bank (HO2S-12-22) --  HA100 --
P1129 (All Others) Downstream Oxygen Sensors Swapped from Bank to Bank (HO2S-12-22) --  H110 --
P1130 (Natural Gas) Lack of HO2S-11 Switch, Fuel Trim at Limit -- --  HA40
P1130 (All Others) Lack of HO2S-11 Switch, Fuel Trim at Limit -- --  HA40
P1131 (Natural Gas) Lack of HO2S-11 Switch, Sensor Indicates Lean --  HA40  HA40
P1131 (All Others) Lack of HO2S-11 Switch, Sensor Indicates Lean --  H40  H40
P1132 (Natural Gas) Lack of HO2S-11 Switch, Sensor Indicates Rich --  HA40  HA40
P1132 (All Others) Lack of HO2S-11 Switch, Sensor Indicates Rich --  H40  H40
P1137 Lack of HO2S-12 Switch, Sensor Indicates Lean --  H80 --
P1138 Lack of HO2S-12 Switch, Sensor Indicates Rich --  H80 --
P1150 (Natural Gas) Lack of HO2S-21 Switch, Fuel Trim at Limit -- --  HA40
P1150 (All Others) Lack of HO2S-21 Switch, Fuel Trim at Limit -- --  H40
P1151 (Natural Gas) Lack of HO2S-21 Switch, Sensor Indicates Lean --  HA40  HA40
P1151 (All Others) Lack of HO2S-21 Switch, Sensor Indicates Lean  H40  H40  H40
P1152 (Natural Gas) Lack of HO2S-21 Switch, Sensor Indicates Rich --  HA40  HA40
P1152 (All Others) Lack of HO2S-21 Switch, Sensor Indicates Rich --  H40  H40
P1157 Lack of HO2S-22 Switch, Sensor Indicates Lean --  H80 --
P1158 Lack of HO2S-22 Switch, Sensor Indicates Rich --  H80 --
P1168 (Natural Gas) Fuel Rail Pressure (FRP) Sensor -- --  DD16
P1169 (Natural Gas) Fuel Rail Pressure (FRP) Sensor -- --  DD16
P1180 (Natural Gas) Natural Gas Fuel Delivery System -- --  HB17
P1181 (Natural Gas) Natural Gas Fuel Delivery System -- --  HB17
P1183 (LS) Engine Oil Temperature (EOT) Sensor Circuit Malfunction -- --  DA111
P1184 (LS) Engine Oil Temperature (EOT) Sensor Out of Self-Test Range  DA110  DA110  DA110
P1229 (5.4L SC Lightning) Charge Air Cooler Pump (CAC  KP1  KP1  KP1
P1232 Low Speed Fuel Pump Primary Circuit Malfunction  KA45  KA45  KA60
P1233 (LS) Fuel Pump Driver Module (FPDM), Also Referred To As Fuel Tank Unit (16) (16) (16)
P1233 (All Others) Fuel Pump Driver Module (FPDM), Also Referred To As Fuel Tank Unit  KB1  KB1  KB1
P1234 (LS) Fuel Pump Driver Module (FPDM), Also Referred To As Fuel Tank Unit  KB1  KB1  KB1
P1234 (All Others) Fuel Pump Driver Module (FPDM), Also Referred To As Fuel Tank Unit (17) (17) (17)
P1235 Fuel Pump Driver Module (FPDM), Also Referred To As Fuel Tank Unit  KB30  KB30  KB30
P1236 Fuel Pump Driver Module (FPDM), Also Referred To As Fuel Tank Unit  KB30  KB30  KB30
P1237 Fuel Pump Driver Module (FPDM), Also Referred To As Fuel Tank Unit  KB47  KB47  KB47
P1238 Fuel Pump Driver Module (FPDM), Also Referred To As Fuel Tank Unit  KB47  KB47  KB47
P1244 Generator Load Input (GLI) --  FH1  FH1
P1245 Generator Load Input (GLI) --  FH1  FH1
P1246(5) Generator Load Input (GLI) --  FH1  FH1
P1246 (All Others) Generator/Regulator System --  HY1  HY1
P1260 Theft Detected - Vehicle Immobilized -- --  QD1
P1270 Engine RPM/Vehicle Speed Limiter -- --  ND1
P1285 Cylinder Head Over Temperature Sensed  DL30  DL30  DL30
P1288 Cylinder Head Temperature (CHT) Sensor Circuit Out of Self-Test Range  DL1  DL1 --
P1289 Cylinder Head Temperature (CHT) Sensor Circuit High Input (PCM STRATEGIES UP TO AND INCLUDING 1998)  DL5  DL5  DL90
P1290 Cylinder Head Temperature (CHT) Sensor Circuit Low Input (PCM STRATEGIES UP TO AND INCLUDING 1998)  DL5  DL5  DL90
P1299 Cylinder Head Over Temperature Protection Active -- --  DL100
P1309 CMP (Hall Effect) Misfire Monitor Disabled -- --  HD41
P1309 CMP (VR) Misfire Monitor Disabled -- --  HD40
P1380 Variable Cam Timing Solenoid A Circuit Malfunction  HK1  HK1  HK15
P1381 Variable Cam Timing Over-advanced (Bank 1)  HK11  HK11  HK16
P1383 Variable Cam Timing Over-retarded (Bank 1)  HK11  HK11  HK17
P1400 DPF EGR Sensor Circuit Low Voltage Detected  HE1  HE1  HE1
P1401 DPF EGR Sensor Circuit High Voltage Detected  HE10  HE10  HE10
P1405 DPF EGR Sensor Upstream Hose Off or Plugged -- --  HE50
P1406 DPF EGR Sensor Downstream Hose Off or Plugged -- --  HE60
P1408 EGR Flow Out of Self-Test Range --  HE71 --
P1409 EGR Vacuum Regulator Solenoid Circuit Malfunction  HE110  HE110  HE120
P1413 Secondary Air Injection system monitor circuit low  HM19  HM19  HM19
P1414 Secondary Air Injection system monitor circuit high  HM27  HM27  HM27
P1443 Check For Evapoarative Emission System Leaks -- -- (3)
P1450 Unable to Bleed Up Fuel Tank Vacuum -- --  HX18
P1451 EVAP Control System Canister Vent Solenoid Circuit Malfunction  HX65  HX65  HX65
P1460 (CCRM) Wide Open Throttle A/C Cutout Primary Circuit Malfunction  X105  X105  X120
P1460 (All Others) Wide Open Throttle A/C Cutout Primary Circuit Malfunction  KM1  KM1  KM30
P1461 Air Conditioning Pressure Sensor (ACP) Sensor High Voltage Detected  DS1  DS1  DS1
P1462 Air Conditioning Pressure Sensor (ACP) Sensor Low Voltage Detected  DS10  DS10  DS10
P1463 Air Conditioning Pressure Sensor (ACP) Insufficient Pressure Change -- --  DS20
P1464 (CCRM) A/C Demand Out Of Self-Test Range  X124  X124 --
P1464 (All Others) A/C Demand Out Of Self-Test Range  KM19  KM19 --
P1469 A/C Demand Out Of Self-Test Range -- --  X115
P1474 (LS) Low Fan Control Primary Circuit Failure  KH1  KH1  KH1
P1474 (CCRM) Low Fan Control Primary Circuit Failure  X20  X20  X30
P1474 (All Others) Low Fan Control Primary Circuit Failure  KF1  KF1  KF10
P1479 (CCRM) High Fan Control Primary Circuit Failure  X15  X15  X35
P1479 (All Others) High Fan Control Primary Circuit Failure  KF1  KF1  KF20
P1500 Vehicle Speed Sensor (VSS) Intermittent -- --  DP25
P1501 Vehicle Speed Sensor (VSS) Out of Self Test Range --  DP15 --
P1502(5) Vehicle Speed Sensor (VSS)/Transfer Case Speed Sensor (TCSS) -- --  DP5
P1502(6) -- -- -- (7)
P1502(8) Vehicle Speed Circuit (VSC) Check -- --  DF1
P1502(9) Vehicle Speed Circuit (VSC) Check -- --  DP30
P1502 (All Others) Vehicle Speed Sensor (VSS)/Transfer Case Speed Sensor (TCSS) -- --  DP1
P1504 Idle Air Control (IAC) Circuit Malfunction  KE2  KE2  KE2
P1506 Idle Air Control (IAC) Overspeed Error -- --  KE20
P1507 Idle Air Control (IAC) Underspeed Error --  KE2  KE2
P1512 Idle Air Control (IAC) Underspeed Error -- --  HU15
P1513 Idle Air Control (IAC) Underspeed Error -- --  HU15
P1516 Intake Manifold Runner Control Input Error (Bank 1)  HU15 --  HU15
P1517 Intake Manifold Runner Control Input Error (Bank 2)  HU15 --  HU15
P1518 Intake Manifold Runner Control Malfunction (Stuck Open)  HU15  HU15  HU15
P1519 Inlet Manifold Runner Control Malfunction (Stuck Closed)  HU15  HU15  HU15
P1520 Inlet Manifold Runner Control Malfunction (Stuck Closed)  HU15  HU15  HU15
P1537 Inlet Manifold Runner Control Malfunction (Stuck Closed)  HU15  HU15  HU15
P1538 Inlet Manifold Runner Control Malfunction (Stuck Closed)  HU15  HU15  HU15
P1549 Intake Manifold Communication Control Circuit Malfunction  HU65 --  HU65
P1550 Power Steering Pressure (PSP) Sensor Malfunction --  DT2  DT1
P1565 Cruise Control (18) (18) (18)
P1566 Cruise Control (18) (18) (18)
P1567 Cruise Control (18) (18) (18)
P1568 Cruise Control (18) (18) (18)
P1605 Keep Alive Memory Test Failure  QB1 -- --
P1633 Keep Alive Memory Test Failure  QB1  QB1  QB1
P1635 Keep Alive Memory Test Failure -- -- (10)
P1636 (A/T) Keep Alive Memory Test Failure Replace PCM(10) Replace PCM(10) Replace PCM(10)
P1640 (Bi-Fuel) Powertrain DTC's Available In Another Module (19) (19) (19)
P1641 Not Available  KB47  KB47  KB47
P1650 Power Steering Pressure (PSP) Switch Malfunction  FF1  FF1 --
P1651 Power Steering Pressure (PSP) Switch Signal Malfunction -- --  FF10
P1700 -- -- -- (14)
P1701 -- -- -- (14)
P1702 -- (14) (14) (14)
P1703 Brake Switch Out of Self-Test Range  FD2  FD1 --
P1704 -- (14) -- (14)
P1705 (Escort) Transmission Range Sensor Out of Self-Test Range  TA5  TA5 --
P1705 (M/T Contour/Mystique) Transmission Range Sensor Out of Self-Test Range --  TA5 --
P1705 (A/T) Transmission Range Sensor Out of Self-Test Range (14) (14) --
P1709 (M/T Contour/Mystique) Park/Neutral Position Switch Out of Self-Test Range  TA5 --  TA5
P1709 (M/T All Others) Park/Neutral Position Switch Out of Self-Test Range  TA1 --  TA1
P1709 (A/T) Park/Neutral Position Switch Out of Self-Test Range (14) -- (14)
P171x -- (14) (14) (14)
P1728 -- -- -- (14)
P1729 4x4 L Switch -- --  TG1
P173x -- (14) (14) (14)
P174x -- (14) (14) (14)
P175x -- (14) (14) (14)
P176x -- (14) (14) (14)
P177x -- (14) (14) (14)
P1780 Transmission Control Switch Out of Self-Test Range --  TB1 --
P1781 --  TG1 -- --
P1783 -- -- -- (14)
P1784 -- -- -- (14)
P1785 -- -- -- (14)
P1786 -- -- -- (14)
P1787 -- -- -- (14)
P1788 -- (14) -- (14)
P1789 -- (14) -- (14)
P179x -- (14) (14) (14)
P18xx -- -- -- (20)
P1900 (A/T) Output Shaft Speed sensor circuit intermittent failure -- -- (14)
P1900 (M/T) Output Shaft Speed sensor circuit intermittent failure -- --  TJ1
P1901 -- -- (14) (14)
BXXXX -- -- -- (17)
UXXXX -- -- -- (17)
(1) DTC Condition & Circuit Test/Step
(2) Applies to Taurus/Sable, E-Series
(3) See DIAGNOSTIC TROUBLE CODE (DTC) REFERENCE table under SYSTEM TESTS (EVAPORATIVE EMISSIONS).
(4) Applies to Mid-year 4.0L SOHC Explorer.
(5) Applies to Contour, Mystique, and Cougar.
(6) Applies to LS, Continental, Town Car, and Windstar.
(7) Vehicle speed information is provided by the anti-lock brake system. See appropriate ANTI-LOCK BRAKE article in the ACCESSORIES & ELECTRICAL section for test procedures.
(8) Applies to Taurus SHO, 4.2L, 5.4L & 6.8L F-Series O/8500 GVW, Explorer/Mountaineer, and Ranger.
(9) Applies to F-Series 4x4 U/8500 (MSOF)
(10) Vehicle Information (VID) block in PCM needs to be reprogrammed. See PROGRAMMING PCM 
(11) Ensure NO aftermarket performance products are being used before replacing PCM. Replace PCM. See PROGRAMMING PCM 
(12) Applies to Continental & Town Car.
(13) Applies to Ranger, Explorer, Expedition, and E/F-Series.
(14) See appropriate DIAGNOSIS article in AUTOMATIC TRANSMISSIONS section.
(15) DTC P1000 is ignored in KOEO ON-DEMAND SELF-TEST and KOER ON-DEMAND SELF-TEST. Disregard DTC P1000 and continue as directed.
(16) Perform REAR ELECTRONICS MODULE (REM) self-test. Go to MODULE COMMUNICATIONS NETWORK-LS article in ACCESSORIES & EQUIPMENT for complete DTC listing.
(17) See appropriate MODULE COMMUNICATIONS NETWORK article in ACCESSORIES & ELECTRICAL section for test procedures.
(18) See appropriate CRUISE CONTROL SYSTEMS article in ACCESSORIES & EQUIPMENT section for test procedures.
(19) DTC P1640 is generated when ALTERNATE FUEL CONTROL MODULE (AFCM) has set a code. Go to SELF-DIAGNOSTIC EEC-V BI-FUEL article to retrieve AFCM DTCs.
(20) See appropriate ELECTRONIC CONTROLS article in TRANSFER CASES.
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