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2013 VW Tiguan P0507 and P2187: Diagnosing Idle Air Control and Lean Burn Issues

Model: 2013 VW Tiguan Fault Code: P0507 Posted: 2017-12-23 18:03

I'm experiencing two diagnostic trouble codes on my 2013 VW Tiguan: P0507 (Idle Air Control System Revolutions Per Minute Higher Than Expected) and P2187 (System Too Lean at Idle, Bank 1). I've tried troubleshooting but can't identify the root cause. Can anyone provide guidance or suggest a step-by-step approach to resolve these issues? I suspect vacuum leaks may be contributing to the lean condition at idle, especially with P2187. However, if the lean condition occurs at higher RPMs, it could point to issues with the Mass Air Flow (MAF) sensor or fuel delivery system. Any insights or real-world fixes would be greatly appreciated.

Related fault codes
P0507P2187
Comments (4)
Anonymous 2017-12-24 16:11

Prioritize diagnosing P2187 first. If the engine is too lean only at idle, a vacuum leak is likely the culprit. If the lean condition persists at higher RPMs, consider issues with the MAF sensor or fuel delivery system.

Anonymous 2017-12-24 18:21

Thanks for the advice! After researching, I replaced the PCV diaphragm. Upon removal, I heard a hissing sound—indicating a torn gasket. After replacing it, the symptoms improved significantly. Will the check engine light reset itself automatically? Or do I need to use a scan tool?

Anonymous 2017-12-24 18:57

P2187 should not appear if fuel trim remains within normal limits. P0507 may or may not be directly related to the lean condition. If no error codes are present after repair, the check engine light will typically turn off. To confirm, use a code reader or scan tool to reset and retest for any returning errors. Let me know if replacing the PCV system resolved your issue.

Anonymous 2017-12-29 19:17

After replacing the PCV diaphragm (as it was torn), my check engine light went out after about three days. This suggests the repair addressed the underlying cause of both codes.