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Diagnostic Trouble Code Reference Chart

NOTE: Record trouble codes found during KOEO, KOER and Continuous Memory tests while performing QUICK TEST. Use DIAGNOSTIC TROUBLE CODE REFERENCE CHART to find appropriate CIRCUIT TEST and follow procedures.
NOTE: Trouble Codes beginning with a "6" are automatic transmission-related problems. If codes are present, see appropriate ELECTRONIC CONTROLS article in AUTOMATIC TRANSMISSIONS.
DIAGNOSTIC TROUBLE CODE REFERENCE CHART

Code/Definition KOEO(Step No.) KOER(Step No.) Continuous(Step No.)
No Codes/Codes Not Listed CIRCUIT TEST QA  QA1 CIRCUIT TEST QA  QA1 CIRCUIT TEST QA  QA1
111 Pass Pass Pass
112 - Temperature Sensor Test (IAT & ECT) DA(20)  - DA(90) 
113 - Temperature Sensor Test (IAT & ECT) DA(10)  - DA(90) 
116 - Temperature Sensor Test (IAT & ECT) DA(1)  1 DA(1)  -
117 - Temperature Sensor Test (IAT & ECT) DA(20)  - DA(90) 
118 - Temperature Sensor Test (IAT & ECT) DA(10)  - DA(90) 
121 - Throttle Position (TP) Sensor/MAF/TPS Fuel Injector Pulse Width Test DH(2)  DH(1)  G(1) 
122 - Throttle Position (TP) Sensor DH(10)  - DH(94) 
123 - Throttle Position (TP) Sensor DH(3)  - DH(90) 
157 - MASS Airflow (MAF) Sensor - - DC(10) 
158 - MASS Airflow (MAF) Sensor DC(21)  1 - DC(21) 
159 - MASS Airflow (MAF) Sensor DC(1)  DC(1)  -
172 - Fuel Control - H(1)  H(1) 
173 - Fuel Control - H(1)  H(1) 
179 - Adaptive Fuel Strategy - - HA(1) 
181 - Adaptive Fuel Strategy - - HA(1) 
211 - DIS Ignition Diagnostic Monitor (IDM) - - NA(1) 
212 - DIS Ignition Diagnostic Monitor (IDM) - - NA(2) 
213 - Spark Timing Check (DIS) - PA(1)  -
214 - Cylinder Identification (CID) Circuit - - DR(1) 
244 - Cylinder Identification (CID) Circuit - DR(1)  -
327 - EGRP Sensor, EGR Vacuum Sol & Egr Vent Sol DD(1)  DD(1)  DD(90) 
332 - EGRP Sensor, EGR Vacuum Sol & Egr Vent Sol - DD(30)  DD(100) 
337 - EGRP Sensor, EGR Vacuum Sol & Egr Vent Sol DD(10)  DD(10)  DD(90) 
411 - Idle Air Control (IAC) Solenoid - KE(15)  -
412 - Idle Air Control (IAC) Solenoid - KE(1)  -
452 - Vehicle Speed Sensor (VSS) - - DP(1) 
511 (1) (1) (1)
512 - Diagnostic Trouble Code 512 - - QB(1) 
513 (1) (1) (1)
519 - Power Steering Pressure (PSP) Switch FF(10)  - -
521 - Power Steering Pressure (PSP) Switch - FF(5)  -
522 - Power Steering Pressure (PSP) Switch - FF(20)  -
536 - Brake On-Off (BOO) Switch - FD(1)  FD(90) 
538 - Dynamic Response Test - M(1)  -
539 - WAC & A/C Demand Switch KM(70)  - -
554 - Fuel Pressure Regulator Control (FPRC) Sol KN(1)  - -
559 - WAC & A/C Demand Switch KM(60)  - -
563 - Low Fan Cntrl (LFC)/high Fan Cntrl (HFC) KF(1)  - -
564 - Low Fan Cntrl (LFC)/high Fan Cntrl (HFC) KF(1)  - -
565 - Canister Purge (CANP) KD(6)  - -
571 - EGRP Sensor, EGR Vacuum Sol & EGR Vent Sol DD(200  - -
572 - EGRP Sensor, EGR Vacuum Sol & EGR Vent Sol DD(20)  - -
998 FMEM (2) - -
No Codes/Codes Not Listed (3) QA(1)  QA(1)  QA(1) 
(1) Replace PCM.
(2) PCM running in Failure Mode Effects Management (FMEM).
(3) For codes not listed, see Circuit Test QA1.
DIAGNOSTIC TROUBLE CODE DEFINITION CHART

Code Definition
111 System Pass
112 Intake Air Temp. Sensor Volt Too Low
113 Intake Air Temp. Sensor Volt Too High
116 Engine Coolant Temp. Sensor Circuit
117 Engine Coolant Temp. Sensor Volt Too High
118 Engine Coolant Temp. Sensor Volt Too Low
121 TPS & MAF Sensor Volts Do Not Agree
122 TPS Sensor Voltage Too Low
123 TPS Sensor Voltage Too High
157 MAF Sensor Voltage Too Low
158 MAF Sensor Voltage Too High
159 MAF Sensor Voltage Circuit
172 HO2S Rich
173 HO2S Lean
179 Fuel System At Lean Limit
181 Fuel System At Rich Limit
211 Primary Ignition Failure
212 Ignition Input Diagnoses Signal Lost
213 Ignition System
214 Cylinder Identification Circuit
244 Cylinder Identification Circuit
327 EGR Function Sensor Circuit
332 EGR Flow Below Minimum Value
337 EGR Flow Above Maximum Value
411 Idle Air Control Valve Circuit
412 Idle Air Control Valve Circuit
452 VSS Signal Too Low
511 PCM Failure
512 PCM Keep Alive Memory Circuit
513 PCM Failure
519 Power Steering Pressure Switch Circuit
521 Power Steering Pressure Switch Circuit
522 Park/Neutral Switch Circuit
536 Stoplight Switch Circuit
538 Dynamic Response Test
539 A/C Sensor
554 Press. Regulator Sol. Valve Circuit
559 A/C Relay Circuit
563 High Speed Fan Control Circuit
564 Low Speed Fan Control Circuit
565 Purge Solenoid Valve Circuit
571 EGR Vent Sol. Valve Circuit
572 EGR Vacuum Sol. Valve Circuit
998 FMEM Mode (Hard Code Present)
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