P0651 Ford

Ford P0651 OBD-II Trouble Code Definition:

P0651 Sensor Reference Voltage B Circuit Fault

P0651 Ford OBD-II Trouble CodeDescription:

OBD Trouble Code P0651
Sensor Reference Voltage “B” Circuit/Open
What does the code mean? OBD-ii Code P0651 definition:
These 5-volt reference circuits are independent of each other outside the PCM, but are bussed together inside the Engine Control Module (ECM). Therefore a circuit condition on one sensor 5-volt reference circuit may affect the other sensor 5-volt reference circuits. The ECM monitors the voltage on the 5-volt reference circuit.
Causes Causes of the OBD-II code P0651
– Shorted sensor – Shorted sensor circuit – Failed ECM The Error code is generally activated on detection of the following conditions: The ECM has detected an out of voltage range on the 5 volt reference circuit 2