Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
Retrieving Codes
Read trouble codes with either CHECK ENGINE light or Red LED inspection light on ECU. Trouble codes will flash after selecting Mode II.
Trouble codes are indicated by the number of flashes from CHECK ENGINE light or Red LED inspection light. Count the flashes. For example, 3 long (.6 second) flashes followed by 2 short (.3 second) flashes of CHECK ENGINE light or Red LED indicate a Code 32.
| Code | System Affected | Probable Cause | ||||
|---|---|---|---|---|---|---|
| 11 (1) | Crank Angle Sensor | (2) No crank signal | ||||
| 12 | Airflow Meter Circuit | Open/shorted circuit | ||||
| 13 | Coolant Temp. Sensor | Open/shorted circuit | ||||
| 14 | Vehicle Speed Sensor (VSS) | No VSS signal | ||||
| 21 (1) | Ign. Signal Circuit | (2) Open/shorted circuit | ||||
| 31 | ECU | Signals not normal | ||||
| 32 | EGR Function (Calif.) | No EGR action | ||||
| 33 | O2 Sensor | Open ckt/high O2 signal | ||||
| 34 (1) | Knock Sensor | Open/shorted ckt | ||||
| 35 | Exhaust Temp. Sensor (Calif.) | Open/shorted ckt | ||||
| 43 | Throttle Sensor | Open/shorted ckt | ||||
| 45 | Injector Leak (Calif.) | Leak at injector(s) | ||||
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.