P045D
Exhaust Gas Recirculation "B" Control Circuit High
DTC P045D, sometimes indicated as P045D00 is an OBD diagnostic trouble code indicating a generic fault with the vehicle powertrain (i.e. engine and gearbox). This code identifies an error with the auxiliary emissions system causing exhaust gas recirculation "b" control circuit high.
The exhaust gas recirculation (EGR) system recirculates a small amount of exhaust gas back into the engine to lower the combustion temperature and reduce NOx emissions. The exhaust gas recirculation "B" control circuit high (DTC P045D) is caused by a short circuit or open circuit in the EGR system "B" control circuit.
The most common cause of the DTC P045D is a short circuit in the wiring harness. The wiring harness can become damaged from rubbing against the exhaust manifold or other hot components. The harness can also become damaged by rodents or other pests.
The DTC P045D can also be caused by an open circuit in the EGR system "B" control circuit. The most common cause of an open circuit is a bad EGR valve.
If the DTC P045D is caused by a short circuit in the wiring harness, the wiring harness should be replaced. If the DTC P045D is caused by an open circuit, the EGR valve should be replaced.
- P045D: Gas Recirculation B Control Circuit High
- P045D: Exhaust Gas Recirculation "B" Control Circuit High
- P045D: Exhaust gas recirculation (EGR) valve actuator B – circuit high
- P045D 00: Exhaust gas recirculation (EGR) valve actuator B - circuit high