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Diagnostic codes !
For those of you like me who are always trying to find out what the dignostic codes are and what the mean here you go !
1999 Oldsmobile Alero - Engine - Engine Controls - 3.4L - Diagnostic
Information and Procedures
DTC P0101 Mass Air Flow (MAF) Sensor Performance
DTC P0102 Mass Air Flow (MAF) Sensor Circuit Low Frequency
DTC P0103 Mass Air Flow (MAF) Sensor Circuit High Frequency
DTC P0107 Manifold Absolute Pressure (MAP) Sensor Circuit Low Voltage
DTC P0108 Manifold Absolute Pressure (MAP) Sensor Circuit High Voltage
DTC P0112 Intake Air Temperature (IAT) Sensor Circuit Low Voltage
DTC P0113 Intake Air Temperature (IAT) Sensor Circuit High Voltage
DTC P0117 Engine Coolant Temperature (ECT) Sensor Circuit Low Voltage
DTC P0118 Engine Coolant Temperature (ECT) Sensor Circuit High Voltage
DTC P0121 Throttle Position (TP) Sensor Performance
DTC P0122 Throttle Position (TP) Sensor Circuit Low Voltage
DTC P0123 Throttle Position (TP) Sensor Circuit High Voltage
DTC P0125 Engine Coolant Temperature (ECT) Insufficient for Closed Loop Fuel
Control
DTC P0131 HO2S Circuit Low Voltage Sensor 1
DTC P0132 HO2S Circuit High Voltage Sensor 1
DTC P0133 HO2S Slow Response Sensor 1
DTC P0134 HO2S Circuit Insufficient Activity Sensor 1
DTC P0135 HO2S Heater Performance Sensor 1
DTC P0137 HO2S Circuit Low Voltage Sensor 2
DTC P0138 HO2S Circuit High Voltage Sensor 2
DTC P0140 HO2S Circuit Insufficient Activity Sensor 2
DTC P0141 HO2S Heater Performance Sensor 2
DTC P0171 Fuel Trim System Lean
DTC P0172 Fuel Trim System Rich
DTC P0201 Injector 1 Control Circuit
DTC P0202 Injector 2 Control Circuit
DTC P0203 Injector 3 Control Circuit
DTC P0204 Injector 4 Control Circuit
DTC P0205 Injector 5 Control Circuit
DTC P0206 Injector 6 Control Circuit
DTC P0230 Fuel Pump Relay Control Circuit
DTC P0300 Engine Misfire Detected
DTC P0325 Knock Sensor Module Performance
DTC P0327 Knock Sensor (KS) Circuit
DTC P0336 Crankshaft Position (CKP) Sensor Circuit
DTC P0341 Camshaft Position (CMP) Sensor Performance
DTC P0401 Exhaust Gas Recirculation (EGR) Flow Insufficient
DTC P0403 Exhaust Gas Recirculation (EGR) Solenoid Control Circuit
DTC P0404 Exhaust Gas Recirculation (EGR) Open Position Performance
DTC P0405 Exhaust Gas Recirculation (EGR) Position Sensor Circuit Low
Voltage
DTC P0420 Catalyst System Low Efficiency
DTC P0440 Evaporative Emission (EVAP) System
DTC P0442 Evaporative Emission (EVAP) System Small Leak Detected
DTC P0446 Evaporative Emission (EVAP) Vent System Performance
DTC P0452 Fuel Tank Pressure Sensor Circuit Low Voltage
DTC P0453 Fuel Tank Pressure Sensor Circuit High Voltage
DTC P0462 Fuel Level Sensor Circuit Low Voltage
DTC P0463 Fuel Level Sensor Circuit High Voltage
DTC P0506 Idle Speed Low
DTC P0507 Idle Speed High
DTC P0530 Air Conditioning (A/C) Refrigerant Pressure Sensor Circuit
DTC P0560 System Voltage
DTC P0601 Control Module Read Only Memory (ROM)
DTC P0602 Control Module Not Programmed
DTC P1106 Manifold Absolute Pressure (MAP) Sensor Circuit Intermittent High
Voltage
DTC P1107 Manifold Absolute Pressure (MAP) Sensor Circuit Intermittent Low
Voltage
DTC P1111 Intake Air Temperature (IAT) Sensor Circuit Intermittent High
Voltage
DTC P1112 Intake Air Temperature (IAT) Sensor Circuit Intermittent Low
Voltage
DTC P1114 Engine Coolant Temperature (ECT) Sensor Circuit Intermittent Low
Voltage
DTC P1115 Engine Coolant Temperature (ECT) Sensor Circuit Intermittent High
Voltage
DTC P1121 Throttle Position (TP) Sensor Circuit Intermittent High Voltage
DTC P1122 Throttle Position (TP) Sensor Circuit Intermittent Low Voltage
DTC P1133 HO2S Insufficient Switching Sensor 1
DTC P1134 HO2S Transition Time Ratio Sensor 1
DTC P1336 Crankshaft Position (CKP) System Variation Not Learned
DTC P1351 Ignition Coil Control Circuit High Voltage
DTC P1352 Ignition Bypass Circuit High Voltage
DTC P1361 Ignition Control (IC) Circuit Low Voltage
DTC P1362 Ignition Bypass Circuit Low Voltage
DTC P1374 Crankshaft Position (CKP) High to Low Resolution Frequency
Correlation
DTC P1380 Misfire Detected - Rough Road Data Not Available
DTC P1381 Misfire Detected - No Communication with Brake Control Module
DTC P1404 Exhaust Gas Recirculation (EGR) Closed Position Performance
DTC P1441 Evaporative Emission (EVAP) System Flow During Non-Purge
DTC P1554 Cruise Control Feedback Circuit
DTC P1573 Lost Communications with Brake/Traction Control (EBTCM) System
DTC P1602 Lost Communications with Brake/Traction Control (EBTCM) System
DTC P1610 Class II Failure with BFC
DTC P1626 Theft Deterrent Fuel Enable Signal Lost
DTC P1630 Theft Deterrent Learn Mode Active
DTC P1631 Theft Deterrent Start Enable Signal Not Correct
DTC P1635 5 Volt Reference Circuit
DTC P1639 5 Volt Reference 2 Circuit
DTC P1641 Air Conditioning (A/C) Clutch Relay Control Circuit
DTC P1651 Cooling Fan Relay 1 Control Circuit
DTC P1652 Cooling Fan Relay 2 Control Circuit
DTC P1662 Cruise Control Inhibit Output Circuit
DTC P1665 Evaporative Emission (EVAP) Vent Solenoid Control Circuit
DTC P1671 Malfunction Indicator Lamp (MIL) Control Circuit
DTC P1676 Evaporative Emission (EVAP) Purge Solenoid Control Circuit
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Linear Mode
