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 (Approved Method)
Turn ignition switch to the "2" position. After 3 seconds, the malfunction light will start flashing fault codes. One flash for fault code 1, two flashes for fault code 2, three flashes for fault code 3 or four times for fault code 4.
If more than one fault code is present, malfunction light will flash fault codes in order of occurrence. After the first fault code is flashed, the malfunction light will be off for 3 seconds. If any other fault(s) are present, malfunction light will flash code related to fault.
After all fault codes are flashed, malfunction light will be off for 3 seconds and then remain on until ignition key is turned off. This signals the end of fault codes present.
If malfunction light stays on continuously, after 3 seconds with ignition switch in "2" position, fault codes 1-4 are not present. This does not mean, however, that other trouble codes may be stored in memory.
| Trouble Codes (1) | Affected Circuit | Probable Cause | ||||
|---|---|---|---|---|---|---|
| MALFUNCTION LIGHT | MCU Power/Ground | No RPM Signal or | ||||
| NOT ON/NO START | or RPM Sensors | MCU Power/Ground | ||||
| 05 | Evaporative Purge Valve | Open/Short to MCU Term. 5 | ||||
| 07 (Fault Code 1) (2) | Airflow Meter | Open/Short to MCU Term. 7, 12 or 26 | ||||
| 10 (Fault Code 2) (2) | Oxygen Sensor | Incorrect air/fuel mixture | ||||
| 28 (Fault Code 2) (2) | Oxygen Sensor | Open/Short to MCU Term. 28 | ||||
| 16 | Fuel Injectors 1, 3 or 5 | Open/Short to MCU Term. 16 | ||||
| 17 | Fuel Injectors 2, 4 or 6 | Open/Short to MCU Term. 17 | ||||
| 22 and/or 04 | Idle Speed Actuator | Unstable Idle Speed | ||||
| 44 (Fault Code 3) (2) | Air Temp. Sensor | Short to MCU Term. 44 | ||||
| 45 (Fault Code 3) (2) | Coolant Temp. Sensor | Open/Short to MCU Term. 45 | ||||
| 52 (Fault Code 4) (2) | Idle Position Switch | Idle Always on at MCU Term. 52 | ||||
| 53 | Full Throttle Switch | Throttle Open Always on at MCU Term. 53 | ||||
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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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