OBD-II Generic Error Code P0337: How to Fix It

Medium 30-60 minutes Medium Severity Verified June 2026
Error Code
P0337
Brand
OBD-II Generic
Product Type
automotive
Severity
Medium
DIY Difficulty
Medium
Estimated Fix Time
30-60 minutes
Error code P0337 indicates that the Engine Control Module (ECM) has detected a low input signal from the crankshaft position sensor. This sensor is crucial for timing fuel injection and ignition. If left unresolved, it can cause rough running, stalling, or no-start conditions.
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Tools You'll Need

How to Fix Error Code P0337

  1. Check Wiring and Connector

    Ensure the ignition is off and disconnect the battery negative terminal before working on electrical components.
  2. Test Sensor Resistance

  3. Verify Power and Ground at Sensor

    Use caution to avoid shorting pins with the meter probe.
  4. Replace Crankshaft Position Sensor

    Some sensors require an air gap adjustment; consult your service manual.
  5. Clear Codes and Test Drive

Parts You May Need

Crankshaft position sensor
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Crankshaft position sensor
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Crankshaft position sensor
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Crankshaft position sensor
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When to Call a Professional

If after replacing the sensor and checking wiring the code returns, the issue may be a faulty ECM or a wiring short inside the harness. Professional diagnosis with advanced tools is recommended.

Frequently Asked Questions

What does error code P0337 mean?
P0337 means the engine control module has detected that the crankshaft position sensor signal voltage is too low. This can cause poor performance or no start.
Can I drive with a P0337 code?
Driving is not recommended as the vehicle may stall or run poorly. It's best to diagnose and fix the issue promptly to avoid further damage.
How much to fix code P0337?
Replacing a crankshaft position sensor typically costs $100-$200 for parts and labor if done by a shop. DIY cost is around $20-$60 for the sensor.
What causes P0337?
Common causes include a faulty crankshaft position sensor, damaged wiring or connectors, a bad ECM, or corrosion at the sensor connector.
Can a bad battery cause P0337?
While a low battery can cause various sensor errors, P0337 is more likely due to the sensor itself or its circuit. Check battery voltage first if suspect.