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.
Self-Diagnostic Codes
On Acura models a System Checker Harness (07999-PD60000A) is needed to test components. To reset ECU, on Integra models, remove hazard fuse at battery terminal for 10 seconds.
A Red LED light is located on ECU for self-diagnosis codes. Some Models also have a Yellow LED light which is for idle speed adjustment and is not related to trouble shooting codes. The Red LED light is for codes set at component failure. See appropriate LED CODES table in this article. To obtain ECU codes, turn ignition switch to the "ON" position and watch ECU Red LED light.
| LED Blinks (1) | System Code | ||
|---|---|---|---|
| 0 | ECU | ||
| 1 | Oxygen Sensor | ||
| 3 & 5 | MAP Sensor | ||
| 6 | Coolant Temperature Sensor | ||
| 7 | Throttle Angle Sensor | ||
| 8 | TDC Sensor | ||
| 9 | CYL Crank Angle Sensor | ||
| 10 | Intake Air Temperature Sensor | ||
| 13 | Atmospheric Pressure Sensor | ||
| 14 | Electronic Idle Control Valve | ||
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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.