OBD-II code · generic

P0335

Crankshaft Position Sensor 'A' Circuit

System: Camshaft / crankshaft position sensor
Severity: High (4/5)
Can I keep driving?: Drive with caution

What does P0335 mean?

P0335 is defined as “Crankshaft Position Sensor 'A' Circuit”. This code indicates a problem with the camshaft or crankshaft position signal, or with how these two signals line up. The engine computer sets ignition and injection timing from these signals.

Drive gently and only as far as you need to; have it checked as soon as possible.

Symptoms

Hard starting, long cranking or no start
Engine suddenly stalling while driving
Stumbling, loss of power and the check engine light

Common causes

Faulty position sensor or sensor connector
Metal swarf or oil build-up on the sensor tip
Timing belt/chain that has jumped or stretched (timing correlation codes)
Variable valve timing (VVT) unit failure

How to diagnose it

Determine whether the code points to the sensor circuit or to camshaft–crankshaft correlation.
Remove the sensor, clean its tip and check the connector pins.
Check the sensor signal and the phase relationship of the two signals with an oscilloscope.
For correlation codes, check the timing marks and chain stretch.

How to fix it

Replace the faulty sensor.
If the timing has slipped, replace the timing kit (belt/chain, tensioner, guides).
If the VVT unit is faulty, replace it and change the engine oil.

Manufacturer-specific meanings

The same code can mean something different on some makes.

Kia: Crankshaft Position Sensor 'A' Circuit
Nissan: Crankshaft Position Sensor Circuit

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This page is general information; an exact diagnosis needs measurements and a technician’s check.