2009 Infiniti P0335: What It Means & Is It Safe to Drive?
P0335 on the 2009 Infiniti: Crankshaft Position Sensor A Circuit Malfunction. Here's what it means, what usually causes it, what repairs typically cost, and whether it's safe to keep driving.
What this code means
The PCM is not receiving the expected signal from the crankshaft position sensor (CKP). This sensor tells the ECM the exact position and speed of the crankshaft. Without it, the engine may not start or will stall and run poorly.
Common causes on the 2009 Infiniti
- Failed crankshaft position sensor
- Damaged or corroded sensor wiring/connector
- Tone ring (reluctor wheel) damage or debris
- Failed PCM (rare)
Symptoms
- Engine won't start or stalls unexpectedly
- Check Engine Light on
- Engine cranks but will not fire
- Intermittent stalling at speed
Typical fixes
- Replace crankshaft position sensor
- Inspect and repair wiring harness and connector
- Check tone ring for damage or packed debris
Repair cost range
For a 2009 Infiniti, repairs for P0335 typically fall between $100 and $350, depending on the root cause and labor rates in your area.
Known issues on Infiniti
Infiniti VQ crankshaft position sensor failure is uncommon; connector corrosion or wiring harness damage from heat or oil contamination is more likely. Clean and inspect the sensor connector before replacing the sensor.
Most commonly affected models