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.
Continuous Memory Codes (Soft Faults)
These codes indicate a fault that may or may not be present at the time of testing, and are used to diagnose intermittent problems. See appropriate charts under SERVICE CODE DEFINITION CHARTS for definitions of codes. Continuous Memory Codes are retrieved during the KOEO SELF-TEST. Some codes may illuminate the CHECK ENGINE or SERVICE ENGINE SOON light. The corresponding soft trouble code will be retained in the ECA memory. If the fault does not reoccur within 40 warm-up cycles (80 cycles on some models), ECA will automatically clear the code.
Service codes may be cleared from memory by the technician. See CLEARING CODES. Intermittent faults may be caused by a sensor, connector or wiring-related problems. See INTERMITTENTS in the TESTS W/O CODES 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.