Error code

OBD2 P0335

OBD2P0335
Diagnostic Trouble Code· Standard OBD-II fault code read from the vehicle's onboard diagnostics.

What it means

Crankshaft Position Sensor 'A' Circuit.

Severity

moderateThe vehicle may be drivable but with reduced performance.

Summary

P0335 indicates a malfunction in the crankshaft position sensor circuit, which is crucial for determining engine speed and timing.

Symptoms

  • Check Engine Light (CEL) illuminated
  • No-start or start-stall conditions
  • Hard starting
  • Rough idle
  • Poor acceleration

Common Causes

  • Faulty crankshaft position sensor due to age, damage, or corrosion
  • Improper installation of the sensor with incorrect clearance from the reluctor ring
  • Electrical interference from alternator phase problems in Ford trucks and Mustang GT
  • Wiring damage caused by pests or environmental factors
  • Brittle connectors and wire insulation due to age

Diagnosis

  1. Visually inspect all connectors for proper connection
  2. Check the wiring harness for damage or corrosion
  3. Inspect the sensor for resistance and signal using a DVOM set to AC mV

Fixes

  • Replace the crankshaft position sensor

FAQ

Can I drive with P0335?

You can usually drive but expect reduced performance and potential starting issues.

What causes the crankshaft position sensor to fail?

Common causes include age, damage, improper installation, electrical interference, or wiring damage from pests or environmental factors.

View source

Not affiliated with OBD2. Answer summarized from the manufacturer's manual linked above; consult that source for the authoritative procedure.

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