LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Pontiac >> 1995 >> Firebird Formula, 2D Convertible, Standard >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - Tests W/Codes - 3.8L >> Self-Diagnostic System >> Trouble Code Definition
April 5, 2026: LEMON Manuals is launched! Read the announcement.

Trouble Code Definition

TROUBLE CODE DEFINITION

Code No. Circuit Affected
DTC P0101  MAF Sensor System Performance
DTC P0102  MAF Sensor Circuit Low Frequency
DTC P0103  MAF Sensor Circuit High Frequency
DTC P0106  MAP Sensor System Performance
DTC P0107  MAP Sensor Circuit Low Voltage
DTC P0108  MAP Sensor Circuit High Voltage
DTC P0112  IAT Sensor Circuit Low Voltage
DTC P0113  IAT Sensor Circuit High Voltage
DTC P0117  ECT Sensor Circuit Low Voltage
DTC P0118  ECT Sensor Circuit High Voltage
DTC P0121  TP Sensor System Performance
DTC P0122  TP Sensor Circuit Low Voltage
DTC P0123  TP Sensor Circuit High Voltage
DTC P0125  ECT Sensor Excessive Time To Reach Closed Loop
DTC P0131  HO2S 1 Circuit Low Voltage
DTC P0132  HO2S 1 Circuit High Voltage
DTC P0133  HO2S 1 Slow Response
DTC P0134  HO2S 1 Circuit Insufficient Activity
DTC P0135  HO2S 1 Heater Circuit
DTC P0137  HO2S 2 Circuit Low Voltage
DTC P0138  HO2S 2 Circuit High Voltage
DTC P0140  HO2S Insufficient Activity Sensor 2
DTC P0141  HO2S 2 Heater Circuit
DTC P0143  HO2S Circuit Low Voltage Bank 1, Sensor 3
DTC P0144  HO2S Circuit High Voltage Bank 1, Sensor 3
DTC P0146  HO2S Circuit Insufficient Activity Bank 1, Sensor 3
DTC P0147  HO2S Heater Circuit Bank 1, Sensor 3
DTC P0151  HO2S Circuit Low Voltage Bank 2, Sensor 1
DTC P0152  HO2S Circuit High Voltage Bank 2, Sensor 1
DTC P0153  HO2S Slow Response Bank 2, Sensor 1
DTC P0154  HO2S Circuit Insufficient Activity
DTC P0155  HO2S Heater Circuit Bank 2, Sensor 1
DTC P0171  Fuel Trim System Lean Bank 1
DTC P0172  Fuel Trim System Rich Bank 1
DTC P0174  Fuel Trim System Lean Bank 2
DTC P0175  Fuel Trim System Rich Bank 2
DTC P0300  Engine Misfire Detected
DTC P0325  Knock Sensor Module Circuit
DTC P0326  Knock Sensor Circuit High Voltage
DTC P0327  Knock Sensor Circuit Low Voltage
DTC P0336  18X Reference Signal Circuit
DTC P0341  Camshaft Position Sensor Circuit Performance
DTC P0401  EGR System Insufficient Flow
DTC P0420  TWC System Low Efficiency
DTC P0441  EVAP System No Flow During Purge
DTC P0500  VSS Circuit Manual Transmission
DTC P0506  IAC System RPM Low
DTC P0507  IAC System RPM High
DTC P0530  A/C Refrigerant Pressure Sensor Circuit
DTC P0560  System Voltage
DTC P0601  PCM Memory
DTC P0602  PCM Not Programmed
DTC P0704  Clutch Switch Circuit
DTC P0705  Transaxle Range Switch Circuit
DTC P1106  MAP Sensor Circuit Intermittent High Voltage
DTC P1107  MAP Sensor Circuit Intermittent Low Voltage
DTC P1111  IAT Sensor Circuit Intermittent High Voltage
DTC P1112  IAT Sensor Circuit Intermittent Low Voltage
DTC P1114  ECT Sensor Circuit Intermittent Low Voltage
DTC P1115  ECT Sensor Circuit Intermittent High Voltage
DTC P1121  TP Sensor Circuit Intermittent High Voltage
DTC P1122  TP Sensor Circuit Intermittent Low Voltage
DTC P1133  HO2S Insufficient Switching Sensor 1
DTC P1134  HO2S Transition Time Ratio Sensor 1
DTC P1153  HO2S Insufficient Switching Bank 2, Sensor 1
DTC P1154  HO2S Sensor Transition Time Ratio Bank 2, Sensor 1
DTC P1200  Injector Control Circuit
DTC P1350  Ignition Control (IC) Circuit
DTC P1361  Ignition Control (IC) Circuit Not Toggling
DTC P1374  3X Reference Circuit
DTC P1381  Misfire Detected No EBCM/PCM Serial Data
DTC P1406  EGR Valve Pintle Position Circuit
DTC P1441  EVAP Emissions System Flow During Non-Purge
DTC P1442  EVAP Emission System Vacuum Switch Circuit
DTC P1554  Cruise Control Status Circuit
DTC P1626  Theft Deterrent System Fuel Enable Circuit
DTC P1629  Theft Deterrent System Fuel Enable Circuit
DTC P1635  5 Volt-Reference "A" Circuit
DTC P1639  5 Volt-Reference "B" Circuit
DTC P1641  MIL Circuit
DTC P1651  Fan 1 Relay Control Circuit
DTC P1652  Fan 2 Relay Control Circuit
DTC P1654  A/C Relay Control Circuit
DTC P1655  EVAP Emission Purge Solenoid Control Circuit
DTC P1662  Cruise Control Inhibit Circuit