P040F FORD - Exhaust Gas Recirculation Temperature Sensor 'A'/'B' Correlation
- Faulty Exhaust Gas Recirculation Temperature Sensor 'A' or 'B'
- Exhaust Gas Recirculation Temperature Sensor 'A' or 'B' harness is open or shorted
- Exhaust Gas Recirculation Temperature Sensor 'A' or 'B' circuit poor electrical connection
- Engine Light ON (or Service Engine Soon Warning Light)
P040f Ford DescriptionThe Engine Control Module (ECM) monitors the Exhaust Gas Recirculation (EGR) Temperature Sensor 'A' and 'B' Circuit Performance, which measures the temperature of the exhaust gas. The EGR Temperature Sensor functions by increasing the resistance with increasing exhaust gas temperature. The ECM sets the OBDII code when the EGR Temperature Sensor signal is not to factory specifications.
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