P0335 means the engine control unit is not receiving a valid signal from the crankshaft position sensor. This sensor tells the ECU where the crankshaft is in its rotation, which is essential for fuel injection and ignition timing. Without it, the engine may not start or may stall unexpectedly.
P0335 means the engine control unit is not receiving a valid signal from the crankshaft position sensor. This sensor tells the ECU where the crankshaft is in its rotation, which is essential for fuel injection and ignition timing. Without it, the engine may not start or may stall unexpectedly.
P0335 is a ignition-related diagnostic trouble code classified as critical severity. When your vehicle's ECU detects this condition, it stores P0335 and illuminates the check engine light.
If your vehicle has triggered P0335, you may notice one or more of these symptoms:
Here are the most common causes of P0335, ranked by how likely they are to be the culprit:
No - address this immediately. A faulty crankshaft position sensor can cause the engine to stall without warning, including at motorway speeds. The engine may also refuse to start. Do not drive until this is resolved.
Follow these steps to pinpoint the root cause of P0335:
Repair costs for P0335 vary depending on the root cause and your vehicle. Here are typical estimates:
Prices estimated as of March 2026. Costs vary by region, vehicle, and shop.
P0335 behaves differently depending on your vehicle. Select your car below for model-specific causes, known issues, and adjusted cost estimates:
These codes are often seen alongside P0335 or indicate related issues:
Yes. The crankshaft position sensor provides the primary signal that tells the ECU when to fire the spark plugs and injectors. Without this signal, most engines will crank but refuse to start entirely.
It monitors the rotational speed and position of the crankshaft using a toothed reluctor ring. The ECU uses this data to precisely time fuel injection and ignition events. It is one of the most critical engine sensors.
Heat-related stalling is a classic symptom of a failing crankshaft position sensor. As the sensor heats up, internal components expand and lose their ability to generate a clean signal. The engine often restarts after cooling down.
The sensor itself typically costs 20 to 100 EUR. Labour ranges from 50 to 200 EUR depending on the sensor location. On many vehicles it is accessible from underneath or behind the engine, making it a straightforward replacement.
On many cars it is a moderate DIY job. The sensor is usually held in by one or two bolts. The challenge is access, as it is often located low on the engine block near the starter or behind the crankshaft pulley. You will need a jack and possibly a socket extension.
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