Autodata Technical Issue 58 – 2007 Citroen C6 with increased engine idle speed

Each month the Autodata team answers a common technical question and provides a printable document with technical diagrams to download and keep, exclusively for IGA members.

Q. We are having trouble diagnosing a fault on a 2007 Citroën C6 2,7 HDI with an increased engine idle speed. The vehicle came in with the engine malfunction indicator lamp (MIL) illuminated and several engine management trouble codes stored. We have visually checked the intake system for air leaks but have not found the cause of the fault. Have you come across this increased engine idle speed fault before? 

A. Yes, we are aware of an increased engine idle speed fault and it affects Citroën C6 models with 2,7 HDI engine. The increased engine idle speed fault complete with trouble code P0069 is due to the manifold absolute pressure (MAP) sensor being faulty or contaminated with dirt. 

Fit a new MAP sensor (fig. 1.1). Erase trouble codes and check engine idle speed to ensure the fault has been fixed.

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