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The Ford Transit trouble code p1402 indicates an issue with the Engine Gas Recirculation (EGR) valve position (EVP) sensor circuit. This valve recirculates small amounts of exhaust gas back into the engine intake system to boost efficiency, cut fuel usage, and lower NOx emissions. Signs of a faulty EGR valve include rough idling or stalling, a fuel smell, increased fuel consumption, engine noises like pinging or knocking, and a lit check engine light. An EGR valve can go bad by staying open constantly or closed all the time.
The p1402 code on a Ford car indicates that a problem was found in the circuit of the engine's exhaust gas recirculation valve position sensor.