Ford DTC P0335 Decoded: Crankshaft Position Sensor Circuit

Code Meaning: Crankshaft Position Sensor Circuit A Fault


  • Damaged crankshaft position sensor
  • Damaged reluctor ring
  • Sensor output open or shorted to ground or voltage
  • Damaged CKP sensor connector
  • Broken timing belt

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Black sedan 4dr Ford


Note that the crank sensor is only used to detect misfires, not spark timing, so this won’t change the vehicle’s ability to start. It’s also important to note that the code won’t appear until the problem happens enough over time to be a problem — otherwise it won’t throw a code.

  • Check Engine Light is on
  • Lack of power/power loss is possible
  • Engine might stall while driving

What Does The Code Mean?

The Crankshaft Position Sensor, also called the crank position sensor, is a sensor used in the engine to monitor and record the rate the crank is spinning. It is used by the ECM to control the ignition and fuel injection.

When the engine is running, the gap in the sensor changes with the high and low parts of the teeth. It’s this changing gap that causes the magnetic field that causes the voltage from the sensor to change.

How To Fix Potential Issues

  • Using a scan tool, check for an RPM signal when the engine is running
  • If no RPM reading, visually inspect the crank sensor and repair if needed
  • If no damage is apparent, check the CKP 5 Volt square wave pattern with a scope
  • Check the resistance of the sensor to make sure it’s within spec, if not, replace the sensor

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