P0337: Crankshaft Position Sensor A Circuit Low Input
Can you still drive? Possibly, but the engine may stall without warning. If the sensor fails completely, the engine will not start at all.
What Does P0337 Mean?
Code P0337 indicates that the crankshaft position sensor is producing a signal voltage lower than expected. The crankshaft position sensor is critical for engine operation, providing the ECM with crankshaft speed and position data needed for fuel injection and ignition timing.
Need to read your codes?
An OBD-II scanner lets you read and clear diagnostic trouble codes from your vehicle's computer. Most scanners work with any car made after 1996.
Browse OBD-II Scanners on AmazonCommon Causes
- Failing crankshaft position sensor
- Excessive sensor-to-reluctor air gap
- Damaged or corroded wiring
- Cracked or chipped reluctor ring teeth
- Weak sensor magnet
Symptoms
- Engine cranks but won't start
- Intermittent stalling
- Rough idle
- Check engine light on
- Loss of tachometer signal
Diagnostic Steps
- 1Check for crank sensor signal on scan tool while cranking
- 2Measure sensor resistance and compare to specifications
- 3Inspect sensor air gap to reluctor ring
- 4Check wiring between sensor and ECM for damage
- 5Inspect reluctor ring for missing or damaged teeth
- 6Test sensor output with an oscilloscope
Recommended Parts & Tools
crankshaft position sensor
sensor feeler gauge set
Estimated Repair Cost
| Type | Estimated Cost |
|---|---|
| Total Repair Cost Range | $75 - $350 |
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Chat with AI About P0337Commonly Affected Vehicles
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Frequently Asked Questions
Can a weak crank sensor signal cause intermittent stalling?
Yes, a sensor producing a low signal may work when cold but fail as it heats up, causing the engine to stall randomly and sometimes not restart until it cools.
Where is the crankshaft position sensor?
It's typically located near the crankshaft pulley at the front of the engine or near the flywheel at the rear, depending on the vehicle.
Community Fix Reports
Community reports are user-submitted and not verified by Auto AI Buddy. Results may vary.
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