P0335
CriticalCrankshaft Position Sensor A Circuit
Engine System
What Does P0335 Mean?
The ECM is not receiving a proper signal from the crankshaft position sensor. This sensor is critical for engine timing and fuel injection.
Common Fix
Replace crankshaft position sensor
Estimated Cost (DIY)
$15 - $50
Symptoms
- ⚠️No start or intermittent no-start
- ⚠️Engine stalls while driving
- ⚠️Tachometer drops to zero intermittently
- ⚠️Check engine light
Common Causes
Failed crankshaft position sensorlikely
Damaged reluctor ring (tone wheel)possible
Wiring or connector issuepossible
Excessive crankshaft endplayunlikely
How to Diagnose P0335
- 1Check sensor connector for corrosion
- 2Test sensor resistance and AC voltage output while cranking
- 3Inspect reluctor ring for damage through sensor hole
- 4Check wiring continuity
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Frequently Asked Questions
- Can a bad crank sensor cause a no-start?
- Yes — the crankshaft position sensor is essential. Without it, the ECM cannot fire the spark plugs or injectors at the right time.
- How do crank sensors fail?
- Heat is the #1 killer. The sensor works fine cold but fails when hot, causing intermittent stalling or no-starts.