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.
Code/Test Menu (KOER)
| On Demand Codes | Proceed to Test | ||
|---|---|---|---|
| 11 | (1)CONTINUOUS TEST | ||
| Any | See Code No. Below | ||
| None | Repeat self-test; then TEST D | ||
| 12 | TEST J | ||
| 16 | TEST I , step 15) | ||
| 21 | TEST E | ||
| 22 | TEST F | ||
| 23 | TEST G | ||
| 31 | TEST H | ||
| 32, 33, 34 | TEST H , step 9) | ||
| 35 | TEST H , step 19) | ||
| 41 | TEST I | ||
| 42 | TEST I , step 14) | ||
| 43 | TEST J , step 22) | ||
| 44, 45, 46 | TEST M | ||
| 72 | TEST F , step 10) | ||
| 73 | TEST G , step 14) | ||
| 77 | TEST N | ||
|
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Connect jumper wire or STAR tester to activate test. This test will display an Engine ID code, a Dynamic Response code and an On Demand Service code. After a Dynamic Response code (single digit) is received, quickly press and release accelerator once only.
Deactivate the self-test. Start and run engine at more than 2000 RPM for 2 minutes. Turn engine off and wait 10 seconds. Activate self-test. Start engine. Test will proceed with Engine ID code, Dynamic Response code and Key On-Engine Running On Demand Service codes. If a 10 or 1 pulse occurs during Dynamic Response code, open throttle wide open momentarily. Record codes and proceed as follows:
NO RELATED
Use the Manual With the Right Hardware
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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.