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
Locate ECU under carpet on passenger's footwell, and check for trouble codes. Connect jumper wire to diagnostic connector (Black and White wires). Turn ignition on. Observe CHECK ENGINE light. Light indicates a system failure code by number of blinks.
CHECK ENGINE light indicates component problems with a blinking series of codes. Trouble codes 1-9 are indicated by individual short blinks. Codes 10-59 are indicated by a series of long and short blinks. One long blink equals 10 short blinks. Add long and short blinks together to determine trouble code.
If codes other than those listed are indicated, substitute a known good ECU, and recheck. If codes do not reappear, replace ECU. CHECK ENGINE light may come on indicating a system problem due to a poor or intermittent connection. Check all related connections, and repair as necessary. Whenever CHECK ENGINE light comes on and stays on steadily, see CHECK ENGINE LIGHT STAYS ON under, CODE 0: NO CODES in this article .
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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.
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