Mister.M

Check engine light and transmission problems with Hyundai i30

Hello everyone, I've had a problem with my Hyundai i30 for several months now. The check engine light is on yellow and the error code P0171 is displayed. Lambda sensors 1 and 2, as well as the timing chain, have already been replaced, but the problem persists. In addition, the engine shakes at idle and the automatic transmission doesn't shift as usual – sometimes much too late, sometimes too early. The workshop hasn't been able to find the fault yet. Has anyone had similar experiences or any tips on what the cause might be?

(Translated from German)

1 comment(s)

Check for any vacuum leaks in the intake system, as these can cause a lean condition and trigger the P0171 code. Inspect hoses and connections for cracks or disconnections. Let me know if you find anything or if you have further questions!

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