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P0337Crankshaft Position Sensor "A" Circuit Low

What it means

The crankshaft sensor signal is too low: usually the signal wire is shorted to ground or the sensor supply (on Hall-type sensors) is missing.

Symptoms

  • Engine cuts out while driving, sometimes restarts after cooling down
  • Long crank or no start
  • Rev counter drops to zero when it cuts out

Common causes

  • Signal shorted to ground
  • Missing supply on a Hall-type sensor
  • Failed sensor

What to check first

  1. Scope the crank signal while cranking and wiggling the harness
  2. Inspect the connector pins and the sensor tip
  3. Check the reluctor ring for damaged or missing teeth
Can I drive with P0337? Not recommended. P0337 can lead to stalling, limp mode or engine damage; diagnose it before driving further.

Generic OBD-II meaning. Manufacturer-specific meanings and checks can differ; always check the service information for the car.

How to test the parts behind P0337

Crankshaft position sensor (CKP)Wiring, typical values, multimeter and scope tests

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P0337: questions and answers

What does P0337 mean?

P0337: Crankshaft Position Sensor "A" Circuit Low. The crankshaft sensor signal is too low: usually the signal wire is shorted to ground or the sensor supply (on Hall-type sensors) is missing.

What are the symptoms of P0337?

Engine cuts out while driving, sometimes restarts after cooling down. Long crank or no start. Rev counter drops to zero when it cuts out.

What causes P0337?

Signal shorted to ground. Missing supply on a Hall-type sensor. Failed sensor.

How do you diagnose P0337?

1. Scope the crank signal while cranking and wiggling the harness 2. Inspect the connector pins and the sensor tip 3. Check the reluctor ring for damaged or missing teeth

Can I drive with P0337?

Not recommended. P0337 can lead to stalling, limp mode or engine damage; diagnose it before driving further.