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P0335: Crankshaft Position Sensor 'A' Circuit Malfunction

What this check-engine code means in plain English, what usually causes it, and what a fix typically costs.

Severity: Urgent — may cause stalling or no-start condition

What P0335 means

The crankshaft position sensor (CKP) monitors the position and speed of the crankshaft, sending critical timing data to the engine computer. When this code sets, the sensor signal is missing, erratic, or out of range, preventing the computer from properly controlling ignition timing and fuel injection.

What causes P0335?

Likely
Failed crankshaft position sensorThe sensor itself has failed internally due to heat, vibration, or age and no longer produces a valid signal.
Likely
Damaged sensor wiring or connectorWires may be broken, chafed, corroded, or the connector may have backed out or corroded, interrupting the signal.
Possible
Reluctor ring damage or debrisThe toothed wheel (reluctor) on the crankshaft may be damaged, missing teeth, or have metallic debris interfering with the sensor reading.
Less common
Engine computer (PCM) failureThe powertrain control module itself may have a faulty input circuit, though this is rare compared to sensor or wiring issues.

Is P0335 safe to drive?

Drive it?
Not recommended
Watch for
Stalling, no-start, rough idle, or sudden engine shutdown
DIY-friendly?
Sensor replacement is often straightforward; diagnosis requires a scan tool or multimeter.

Driving is not recommended because the engine may stall without warning, potentially in traffic or unsafe conditions. The vehicle may also fail to restart. If the engine is running, get to a safe location and arrange for repair or towing as soon as possible.

P0335 repair cost

~$100 – $300+

Industry-average estimates. Cost depends on sensor location accessibility and whether wiring repair is needed beyond simple sensor replacement.

Which one is it for your car?

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