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All codes/P0335

P0335

Crankshaft Position Sensor 'A' Circuit Malfunction

High severity

This code indicates a problem with the signal from your engine's crankshaft position sensor, which is crucial for the car's computer to know the engine's speed and piston position. Without this, the engine struggles to run or may not start.

Crankshaft Position Sensor 'A' Circuit Malfunction

Common causes

  • Faulty Crankshaft Position Sensor

    The sensor itself can fail, providing an intermittent or no signal to the PCM.

    high

    Typical part cost: $40-150 part

  • Wiring Harness Issues (open, short, corrosion)

    Damaged wires or corroded connectors can prevent the sensor signal from reaching the PCM.

    medium

    Typical part cost: $0-150 for repair

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First things to check

  1. 1Inspect the crankshaft position sensor wiring and connector for damage, corrosion, or loose connections.
  2. 2Test the crankshaft position sensor's resistance and signal output using a multimeter or oscilloscope.

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Tools you may need

Already have a compatible scanner? Use it. If not, a Bluetooth OBD2 adapter can help you confirm engine codes and check supported live sensor data before replacing parts.

Illustration of a Bluetooth OBD2 adapter, not a product photo

Basic checks

Veepeak OBDCheck BLE

A Bluetooth LE adapter for reading standard engine codes and supported live data.

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Illustration of a Bluetooth OBD2 adapter, not a product photo

Regular diagnostics

vgate iCar Pro BLE 4.0

A Bluetooth LE adapter with an automatic sleep feature for routine code and sensor checks.

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Illustration of a Bluetooth OBD2 adapter, not a product photo

Another option

OBDLink CX

A Bluetooth LE adapter to consider when comparing supported vehicles and diagnostic apps.

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Illustrations shown, not product photos. Check vehicle, phone and app compatibility before buying. These adapters do not guarantee access to ABS, airbags or manufacturer-specific systems. Clearing a code does not repair the fault and can reset emissions readiness monitors.

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Related codes

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Frequently asked questions

What does the crankshaft position sensor do?

The crankshaft position sensor monitors the rotational speed and position of the crankshaft. This information is vital for the engine computer to accurately control ignition timing and fuel injection.

Can a bad crankshaft sensor prevent my car from starting?

Yes, absolutely. If the engine computer doesn't receive a signal from the crankshaft position sensor, it won't know when to fire the spark plugs or inject fuel, preventing the engine from starting.

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