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What causes a P1405 Error Code on Ford Ranger?

Possible Causes

* Faulty exhaust gas recirculation (EGR) valve

*Faulty EGR valve position sensor

*Vacuum leaks

* Faulty oxygen sensor

* Faulty catalytic converter

* Faulty mass air flow (MAF) sensor

* Faulty intake air temperature (IAT) sensor

* Faulty throttle position sensor (TPS)

* PCM failure