Possible Causes

- Shorted sensor - Shorted sensor circuit - Failed ECM

When Detected

The ECM has detected an out of voltage range on the 5 volt reference circuit B

Description

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.