Code P229f knock sensor?

2011 MERCEDES BENZ ML350
79,000 MILES • 3.5L • 6 CYL • 4WD • AUTOMATIC
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MEELYBUG
  • MEMBER
  • 3 POSTS
P229f code. Replace knock sensor, the code returns. Should there be a learning in process for the sensor?
Apr 26, 2018 at 6:04 PM
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STEVE W.
  • CAR REPAIR CONTRIBUTOR
  • 15,158 POSTS
No learning process. A common cause for that code is a fault in the actual harness. Usually from a corroded connector. Does the engine make noise while running? THis can trigger a false code fromt he knock sensor. Can you please shoot a quick video with your phone so we can hear the noise? that would be great. You can upload it here with your response.
Apr 27, 2018 at 11:44 AM
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