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- - PCM code P056 (https://www.cadillacforum.com/forum/cadillac-seville-16/pcm-code-p056-399/)

lilchris1500

12-15-2005 06:01 PM

PCM code P056

I keep getting a P056 code but the service engine soon light does not stay on all the time. What should I do?

Logan

01-12-2006 02:46 PM

RE: PCM code P056

Hmmm.....that is the transmission input speed sensor. $20 part $2000 deep into the trans. It is NOT the VSS sensor.

You can check the transmission connections, also, note, that spark plug wires resting on any part of the engine harness can cause a false code.

Logan Diagnostic
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