Notes On Trouble Codes
- When Trouble Code P1500 occurs, MIL on instrument panel will not come on. When Trouble Code P1510 occurs, MIL on instrument panel will not come on.
- When certain malfunctions or trouble codes initially occur, they will be temporarily stored in ECM memory, but MIL on instrument panel will not come on.
- The second time malfunction or trouble code is detected, MIL on instrument panel will then come on, provided ignition is turned off and then back on after malfunction or trouble code was first detected. This is referred to as the Two Trip Detection Logic and only applies to specified trouble codes. See TROUBLE CODE IDENTIFICATION table.
NOTE:
When road testing vehicle in Check Mode, the Two Trip Detection Logic will not function. In Check Mode, the MIL on instrument panel will come on the first time malfunction or trouble code is detected.
TROUBLE CODE DETECTING CONDITIONS
| Trouble Code | Problem Area | ||
|---|---|---|---|
| P0100 | Open Or Short Circuit In Airflow Meter Circuit At Less Than 4000 RPM | ||
| P0101 | Closed Throttle Switch On With Engine Less Than 900 RPM & Airflow Meter Output Voltage Greater Than 2.2 Volts | ||
| P0110 | Open Or Short Circuit In Intake Air Temp. Sensor Circuit | ||
| P0115 | Open Or Short Circuit In Engine Coolant Temp. Sensor Circuit | ||
| P0116 | After Engine Operates At Least 20 Minutes, Engine Coolant Temperature Is Less Than Approx. 86°F (30°C) | ||
| P0120 | Closed Throttle Switch Off & VTA Voltage Is Less Than .1 Volt Or VTA Voltage Is Greater Than 4.9 Volts | ||
| P0121 | Closed Throttle Switch Is On & VTA Voltage Is Greater Than 2.0 Volts | ||
| P0125 | Heated O2 Sensor Not Indicating Rich With Engine Speed Greater Than 1500 RPM & Vehicle Speed Is Greater Than 25 MPH For At Least 2 Minutes | ||
| P0130 | Heated O2 Sensor Voltage Remains At .4-.55 Volt During Idling With Engine Warm | ||
| P0133 | Heated O2 Sensor Voltage Response Time Exceeds One Second During Idling With Engine Warm | ||
| P0135 | O2 Sensor Heater Current Is Less Than .25 Amp Or Exceeds 2 Amps Or Voltage Drop For The Heater Exceeds 5 Volts | ||
| P0136 | Heated Oxygen Sensor Voltage Remains At .4 Volt Or Exceeds 5 Volt When Vehicle Is Driven At 31 MPH With Engine Warm | ||
| P0141 | O2 Sensor Heater Current Is Less Than .25 Amp Or Exceeds 2 Amps Or Voltage Drop For The Heater Exceeds 5 Volts | ||
| P0171 | With Engine Warm, Air/Fuel Ratio Is Rich | ||
| P0172 | With Engine Warm, Air/Fuel Ratio Is Lean | ||
| P0201 | Cylinder No. 1 Misfires Continuously | ||
| P0202 | Cylinder No. 2 Misfires Continuously | ||
| P0203 | Cylinder No. 3 Misfires Continuously | ||
| P0204 | Cylinder No. 4 Misfires Continuously | ||
| P0300 | Misfire Of Multiple Cylinders During Same 200-1000 Engine Revolutions | ||
| P0301 | No. 1 Cylinder Misfiring Detected For Each 200 Or 1000 Engine Revolutions | ||
| P0302 | No. 2 Cylinder Misfiring Detected For Each 200 Or 1000 Engine Revolutions | ||
| P0303 | No. 3 Cylinder Misfiring Detected For Each 200 Or 1000 Engine Revolutions | ||
| P0304 | No. 4 Cylinder Misfiring Detected For Each 200 Or 1000 Engine Revolutions | ||
| P0325 | No Knock Sensor No. 1 Signal At 2000 RPM | ||
| P0335 | No Crankshaft Position Sensor Signal To ECM | ||
| P0336 | Deviation In Crankshaft & Camshaft Position Sensor Signals | ||
| P0340 | No Camshaft Position Sensor Signal To ECM | ||
| P0401 | With Engine Warm & Driven At 50 MPH For 5 Minutes, EGR Gas Temp. Sensor Value Does Not Exceed Ambient Air Temp. By 72°F (40°C) | ||
| P0402 | EGR Valve Always Open Or EGR Gas Temp. Sensor Value Is High During EGR Cut Off With Engine Cold | ||
| P0420 | With Engine Warm, Heated O2 Sensors Have Same Wave Patterns | ||
| P0441 | Evaporative Emission System Has Improper Response To Computer Command | ||
| P0500 | No Vehicle Speed Sensor Signal To ECM | ||
| P0505 | Idle Speed Varies Greatly From ECM Target Speed | ||
| P0510 | TP Switch Does Not Turn On When Vehicle Is Driven | ||
| P1300 (1) | No IGF Signal To ECM Per Consecutive IGT Signals | ||
| P1500 (1) | No Starter Signal To ECM | ||
| P1510 (1) | Intake Air Volume Too Low With Supercharger Magnetic Clutch On With Engine Speed Of At Least 2800 RPM | ||
| P1600 (1) | Open Circuit In ECM Back-Up Power Source | ||
| P1605 (1) | ECM Malfunction For Knock Control | ||
| P1705 (1) | Direct Clutch Speed Sensor Output Is 300 RPM Or Less With Vehicle At 20 MPH Or More & With Park/Neutral Position Switch Off | ||
| P1765 (1) | With Engine Warm, Current Flow To Shift Solenoid Valve SLN Is .2 Amp Or Less For One Second With Engine At 500 RPM Or More, Or With Park/Neutral Position Switch Off | ||
| P1780 (1) | Park/Neutral Position Switch On When Driving Vehicle At 44 MPH Or More With Engine At 1500-2500 RPM | ||
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TROUBLE CODE IDENTIFICATION
| Code | Two Trip Logic | System Affected | Probable Cause | ||
|---|---|---|---|---|---|
| P0100 | No | Airflow Meter Ckt Malfunction | Airflow Meter Or Ckt, ECM | ||
| P0101 | Yes | Airflow Meter Ckt Range/Performance | Airflow Meter | ||
| P0110 | No | Intake Air Temp. Ckt Malfunction | Intake Air Temp. Sensor Or Ckt, ECM | ||
| P0115 | No | Engine Coolant Temp. Ckt Malfunction | Engine Coolant Temp. Sensor Or Ckt, ECM | ||
| P0116 | Yes | Engine Coolant Temp. Ckt Range/Performance | Engine Coolant Temp. Sensor, Cooling System | ||
| P0120 | No | Throttle Position Ckt Malfunction | Throttle Position Sensor Or Ckt, ECM | ||
| P0121 | Yes | Throttle Position Ckt Range/Performance | Throttle Position Sensor | ||
| P0125 | No | Insufficient Coolant Temp. For Closed Loop Fuel Control | Heated Oxygen Sensor Or Ckt | ||
| P0130 | Yes | Heated Oxygen Sensor Ckt Malfunction (Bank 1, Sensor 1) | Heated Oxygen Sensor, Fuel Trim Malfunction | ||
| P0133 | Yes | Heated Oxygen Sensor Ckt Slow Response (Bank 1, Sensor 1) | Heated Oxygen Sensor | ||
| P0135 | Yes | Heated Oxygen Sensor Ckt Malfunction (Bank 1, Sensor 1) | Heated Oxygen Sensor Or Ckt, ECM | ||
| P0136 | Yes | Heated Oxygen Sensor Ckt Malfunction (Bank 1, Sensor 2) | Heated Oxygen Sensor | ||
| P0141 | Yes | Heated Oxygen Sensor Ckt Malfunction (Bank 1, Sensor 2) | Heated Oxygen Sensor Or Ckt, ECM | ||
| P0171 | Yes | System Too Lean (Fuel Trim) | Air Intake Hose, Fuel Pressure, Injector, Oxygen Sensor Or Ckt, Airflow Meter, Engine Coolant Temp. Sensor | ||
| P0172 | Yes | System Too Rich (Fuel Trim) | Fuel Pressure, Injector, Oxygen Sensor Or Ckt, Airflow Meter, Engine Coolant Temp. Sensor | ||
| P0201 | Yes | Injector Ckt Malfunction (Cyl. No. 1) | Injector Or Ckt, Ignition System, Improper Valve Clearance, Compression Pressure | ||
| P0202 | Yes | Injector Ckt Malfunction (Cyl. No. 2) | Injector Or Ckt, Ignition System, Improper Valve Clearance, Compression Pressure | ||
| P0203 | Yes | Injector Ckt Malfunction (Cyl. No. 3) | Injector Or Ckt, Ignition System, Improper Valve Clearance, Compression Pressure | ||
| P0204 | Yes | Injector Ckt Malfunction (Cyl. No. 4) | Injector Or Ckt, Ignition System, Improper Valve Clearance, Compression Pressure | ||
| P0300 | No | Random Misfire Detected | Injector, Fuel Pressure, EGR, Ignition System, Improper Valve Clearance, Improper Valve Timing, Airflow Meter, Compression Pressure, Engine Coolant Temp. Sensor | ||
| P0301 | Yes | Misfire Detected (Cylinder No. 1) | Injector, Fuel Pressure, EGR, Ignition System, Improper Valve Clearance, Improper Valve Timing, Airflow Meter, Compression Pressure, Engine Coolant Temp. Sensor | ||
| P0302 | Yes | Misfire Detected (Cylinder No. 2) | Injector, Fuel Pressure, EGR, Ignition System, Improper Valve Clearance, Improper Valve Timing, Airflow Meter, Compression Pressure, Engine Coolant Temp. Sensor | ||
| P0303 | Yes | Misfire Detected (Cylinder No. 3) | Injector, Fuel Pressure, EGR, Ignition System, Improper Valve Clearance, Improper Valve Timing, Airflow Meter, Compression Pressure, Engine Coolant Temp. Sensor | ||
| P0304 | Yes | Misfire Detected (Cylinder No. 4) | Injector, Fuel Pressure, EGR, Ignition System, Improper Valve Clearance, Improper Valve Timing, Airflow Meter, Compression Pressure, Engine Coolant Temp. Sensor | ||
| P0325 | No | Knock Sensor No. 1 Ckt Malfunction | Knock Sensor No. 1 Or Ckt, ECM | ||
| P0335 | Yes | Crankshaft Position Sensor Ckt | Crankshaft Position Sensor Or Ckt, Starter, ECM | ||
| P0336 | Yes | Crankshaft Position Sensor Ckt Range/Performance | Mechanical Malfunction, ECM | ||
| P0340 | Yes | Camshaft Position Sensor Ckt Malfunction | Camshaft Position Sensor Or Ckt, Starter, ECM | ||
| P0401 | Yes | Exhaust Gas Recirculation Flow Insufficient Detected | EGR Valve Or Hoses, EGR VSV Or Ckt, EGR Gas Temp. Sensor Ckt, ECM | ||
| P0402 | Yes | Exhaust Gas Recirculation Flow Excessive Detected | EGR Valve Or Hoses, EGR VSV Or Ckt, EGR Gas Temp. Sensor Ckt, ECM | ||
| P0420 | No | Catalyst System Efficiency Below Threshold | Catalytic Converter, Oxygen Sensor Or Ckt | ||
| P0441 | Yes | Evaporative Emission Control System | EVAP VSV Or Ckt, Defective Hoses Or Charcoal | ||
| P0441 | Yes | Incorrect Purge Flow | Canister, ECM | ||
| P0500 | No | Vehicle Speed Sensor Malfunction | Vehicle Speed Sensor Or Ckt, Instrument Cluster, ECM | ||
| P0505 | Yes | Idle Control System Malfunction | IAC Valve Or Ckt, A/C Idle-Up VSV | ||
| P0510 | Yes | Closed Throttle Switch Malfunction | TPS Or Ckt, ECM | ||
| P1300 (1) | No | Ignitor Ckt Malfunction | Ignitor Ckt To ECM, Ignitor, ECM | ||
| P1500 (1) | No | Starter Signal Ckt Malfunction | Starter Signal Ckt, Ignition Switch, Starter Relay, ECM | ||
| P1510 (1) | No | Boost Pressure Control Ckt Malfunction | Supercharger Magnetic Clutch, Supercharger Relay Or Ckt, Supercharger By-Pass Valve Or Ckt, Loose Air Intake Hose, ECM | ||
| P1600 (1) | No | ECM BATT Malfunction | ECM Power Source | ||
| P1605 (1) | No | Knock Control Malfunction | ECM | ||
| P1780 (1) | Yes | Park/Neutral Position Switch Malfunction | Park/Neutral Position Switch Or Ckt, ECM | ||
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