P0526 Code - Cooling Fan Speed Sensor Circuit

What Does P0526 Mean?

OBD-II Code Cooling fans may stay on all the time is defined as a Fan Speed Sensor Circuit

The purpose of the electric cooling fan system is to provide extra cooling capacity to the conventional radiator cooling system on hot days, and/or when the A/C is on, an/or when the vehicle is being driven in stop and go traffic which causes insufficient Airflow over the radiator. When the engine control module (PCM) cannot control the cooling fan as desired, it will set code P0526.

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What are the common causes of P0526 ?

Common causes include a bad cooling fan motor or a faulty cooling fan relay. Less common causes include corroded or loose electrical connectors, a faulty engine coolant temperature sensor, and open or shorted electrical wiring (often resulting in a blown fuse).



How do you troubleshoot P0526 ?

You might continue by connecting the scanner to the vehicle diagnostic connector and retrieving all stored codes and freeze frame data. With the valve disconnected, the red voltmeter lead should be attached to the IMRC valve power wire and the black voltmeter lead connected to ground. Oxygen sensors signal the engine management computer the amount of oxygen present in the exhaust, which is used in determining and controlling the fuel ratio.

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