Section 6 (Engine Controls - Tests W/Codes): Summary
WARNING: This page is about a different car, the 1991 Acura Legend. However, it is still accessible from the selected car via links, so may be relevant.
If no hard fault codes are present, driveability symptoms exist or intermittent codes exist, proceed to TESTS W/O CODES article for diagnosis by symptom (i.e., ROUGH IDLE, NO START, etc.) or intermittent diagnostic procedures.
TROUBLE CODE IDENTIFICATION CHART (1)
| Code | System Affected | Probable Cause | ||||
|---|---|---|---|---|---|---|
| 0 | ECU | No Signal to ECU | ||||
| 1 | O2 Sensor (Left) | Open/Shorted Signal Circuit | ||||
| 2 | O2 Sensor (Right) | Open/Shorted Signal Circuit | ||||
| 3 | MAP Sensor | MAP Sensor Electrical Problem | ||||
| 4 | Crank Angle No. 1 | Sensor Circuit Problem | ||||
| 5 | MAP Sensor | MAP Sensor Mechanical Problem | ||||
| 6 (2) | Coolant Temp Sensor (TW) | Open/Shorted Signal Circuit | ||||
| 7 (2) | Throttle Angle Sensor | Open/Shorted Signal Circuit | ||||
| 9 | No. 1 Cylinder Position | Problem in CYL Sensor Circuit | ||||
| 10 | Intake Air Temperature | Open/Shorted Signal Circuit | ||||
| 12 | EGR System | No EGR Action | ||||
| 13 | Atmospheric Pressure | Open/Shorted Signal Circuit | ||||
| 14 | Electronic Air Control Valve (EACV) | EACV Circuit Problem | ||||
| 15 | Ignition Output Signal | Open/Shorted Signal Circuit | ||||
| 16 | Fuel Injector | Open/Shorted Signal Circuit | ||||
| 17 (2) | Vehicle Speed Sensor (VSS) | No VSS Signal | ||||
| 18 | Ignition Timing Adjuster | Open/Shorted Signal Circuit | ||||
| 23 | Left Knock Sensor | Open/Shorted Signal Circuit | ||||
| 41 | Left O2 Sensor Heater | Open/Shorted Signal Circuit | ||||
| 42 | Right O2 Sensor Heater | Open/Shorted Signal Circuit | ||||
| 43 | Left Fuel Supply System | Open/Shorted O2 Circuit | ||||
| 44 | Right Fuel Supply System | Open/Shorted O2 Circuit | ||||
| 45 | Left Fuel Metering | Injectors Control | ||||
| 46 | Right Fuel Metering | Injectors Control | ||||
| 53 | Right Knock Sensor | Open/Shorted Signal Circuit | ||||
| 54 | Crank Angle No. 2 | Sensor Circuit Problem | ||||
| 59 | No. 2 Cylinder Position | Problem in CYL Sensor Circuit | ||||
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