Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
Circuit Description
The DTC P0335 Crankshaft Position (CKP) sensor circuit diagnostic monitors the signal from CKP sensor. CKP sensor is a magnetic generator type sensor, producing an alternating current signal. CKP sensor signal increases in both frequency and amplitude as engine RPM increases. CKP sensor sends this reference signal to the Powertrain Control Module (PCM) to indicate crankshaft RPM and position. This reference signal is used by PCM to calculate fuel injection pulse, establish Top Dead Center (TDC) for ignition timing and where to start ignition coil and injection sequencing. There will be no spark or fuel delivery if there is no CKP sensor signal.
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.