LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Pontiac >> 1998 >> Firebird Formula, Standard >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System - System & Component Tests - 5.7L >> Computerized Engine Controls >> Diagnostic Trouble Codes
April 5, 2026: LEMON Manuals is launched! Read the announcement.

Diagnostic Trouble Codes

TROUBLE CODE DEFINITION

Code No. Circuit Affected
P0101 MAF System Performance
P0102 MAF Sensor Circuit-Low Frequency
P0103 MAF Sensor Circuit-High Frequency
P0107 MAP Sensor Circuit-Low Voltage
P0108 MAP Sensor Circuit-High Voltage
P0112 IAT Sensor Circuit-Low Voltage
P0113 IAT Sensor Signal Voltage High
P0117 ECT Sensor Circuit Low Voltage
P0118 ECT Sensor Signal High Voltage
P0121 TP Sensor Circuit Insufficient Activity
P0122 TP Sensor Circuit-Low Voltage
P0123 TP Sensor Circuit-High Voltage
P0125 ECT Excessive Time To Closed Loop
P0131 HO2S Circuit Low Voltage-Bank 1, Sensor 1
P0132 HO2S Circuit High Voltage-Bank 1, Sensor 1
P0133 HO2S Slow Response-Bank 1, Sensor 1
P0134 HO2S Insufficient Activity-Bank 1, Sensor 1
P0135 HO2S Heater Circuit-Bank 1, Sensor 1
P0137 HO2S Circuit Low Voltage-Bank 1, Sensor 2
P0138 HO2S Circuit High Voltage-Bank 1, Sensor 2
P0140 HO2S Insufficient Activity-Bank 1, Sensor 2
P0141 HO2S Heater Circuit-Bank 1, Sensor 2
P0151 HO2S Circuit Voltage Low-Bank 2, Sensor 1
P0152 HO2S Circuit Voltage High-Bank 2, Sensor 1
P0153 HO2S Slow Response-Bank 2, Sensor 1
P0154 HO2S Circuit Insufficient Activity-Bank 2, Sensor 1
P0155 HO2S Heater Circuit-Bank 2, Sensor 1
P0157 HO2S Circuit Voltage Low-Bank 2, Sensor 2
P0158 HO2S Circuit Voltage High-Bank 2, Sensor 2
P0160 HO2S Insufficient Activity-Bank 2, Sensor 2
P0161 HO2S Heater Circuit-Bank 2, Sensor 2
P0171 Fuel Trim System Lean-Bank 1
P0172 Fuel Trim System Rich-Bank 1
P0174 Fuel Trim System Lean-Bank 2
P0175 Fuel Trim System Rich-Bank 2
P0230 Fuel Pump Control Circuit
P0300 Engine Misfire Detected
P0325 Knock Sensor Module Circuit
P0327 Knock Sensor Circuit-Front
P0332 Knock Sensor Circuit
P0335 CKP Sensor Circuit
P0341 CMP Sensor Circuit Performance
P0342 CMP Sensor Circuit Low
P0351/P1351 Ignition Control No. 1 Circuit
P0352/P1352 Ignition Control No. 2 Circuit
P0353 Ignition Control No. 3 Circuit
P0354 Ignition Control No. 4 Circuit
P0355 Ignition Control No. 5 Circuit
P0356 Ignition Control No. 6 Circuit
P0357 Ignition Control No. 7 Circuit
P0358 Ignition Control No. 8 Circuit
P0401 EGR System Flow Insufficient
P0404 EGR System Performance
P0405 EGR Pintle Position Sensor Circ. Low Voltage
P0410 AIR System
P0412 AIR Solenoid Relay Control Circuit
P0418 AIR Pump Relay Control Circuit
P0420 TWC System Low Efficiency-Bank 1
P0430 TWC Low Efficiency-Bank 2
P0440 EVAP System
P0442 EVAP System-Small Leak Detected
P0443 EVAP Canister Purge Sol. Circuit Fault
P0446 EVAP System Canister Vent Blocked
P0449 EVAP System Vent Sol. Circuit Fault
P0452 Tank Pressure Sensor Circuit Fault-Low Voltage
P0453 Tank Pressure Sensor Circuit Fault-High Voltage
P0461 Fuel Level Sensor Circuit Performance
P0462 Fuel Level Sensor Circuit-Voltage Low
P0463 Fuel Level Sensor Circuit-Voltage High
P0480 Cooling Fan Relay No. 1 Control Circuit
P0481 Cooling Fan Relay No. 2 & 3 Control Circuit
P0500 VSS Circuit
P0506 IAC System RPM Low
P0507 Idle Speed High
P0530 A/C Refrigerant Pressure Sensor Circuit
P0562 System Voltage Low
P0563 System Voltage High
P0601 PCM Memory
P0602 PCM Not Programmed
P0604 PCM RAM Performance
P0608 VSS Output Circuit
P0650 MIL Control Circuit
P0654 Engine Speed Output Circuit
P0656 Fuel Gauge Control Circuit
P0801 (1) Reverse Inhibit Solenoid Control Circuit
P0803 (1) Skip Shift Solenoid Control Circuit
P0804 (1) Skip Shift Light Control Circuit
P1111 IAT Sensor Circuit Intermittent High Voltage
P1112 IAT Sensor Circuit Intermittent Low Voltage
P1114 ECT Sensor Circuit Intermittent Low Voltage
P1115 ECT Sensor Circuit Intermittent High Voltage
P1121 TP Sensor Intermittently High Voltage
P1122 TP Sensor Intermittent Low Voltage
P1133 HO2S Insufficient Switching-Bank 1, Sensor 1
P1134 HO2S Transition Time Ratio-Bank 1, Sensor 1
P1153 HO2S Insufficient Switching-Bank 2, Sensor 1
P1154 HO2S Transition Time Ratio-Bank 2, Sensor 1
P1258 Engine Coolant Overtemp.-Fuel Disabled
P1336 CKP System Variation Not Learned
P1380 ABS DTC Rough Road Data Unstable
P1381 Misfire Detected, No EBCM/PCM/VCM Serial Data
P1404 EGR Valve Pintle Stuck Open
P1415 AIR System-Bank 1
P1416 AIR System-Bank 2
P1441 EVAP System Flow During Non-Purge
P1539 A/C Clutch Status Circuit Voltage High
P1545 A/C Clutch Relay Control Circuit
P1546 A/C Clutch Status Circuit Voltage Low
P1626 Loss Of Serial Communication W/Theft Deterrent Or Theft Deterrent System Fuel Enable Circuit
P1639 5-Volt Reference No. 2 Circuit
(1) Covered in entirety in AUTO TRANS DIAGNOSIS article in the AUTO TRANS DIAGNOSIS section.