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P0651 Diagnostic Trouble Code Discussion for March 2015

5-Volt Reference 2 Circuit Malfunction

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Trouble Ticket Help Requests for DTC P0651
Help Request Posted
2012 Volkswagen Passat TDI SE 2.0L MIL Lamp on VIN: 1VWBN7A31C
P0651: ref v b open. This vehicle has a long history of check engine light on. We are picking this one up after a previous post and a delay. We have discovered that the ECM is not putting out a 5v reference on circuits for *(reducatant psi sensor)*, *(glow plug (compression) sens...
March 02, 2015