P0335

Crankshaft Position Sensor "A" Circuit Malfunction

OBD-II diagnostic trouble code P0335indicates a fault detected by the vehicle's onboard computer. This code applies to all OBD-II compliant vehicles and should be addressed promptly to avoid potential engine or emissions system damage.

Severity Level 5 — Critical

This code indicates a critical issue that may cause severe engine damage or complete engine failure. Stop driving immediately and have the vehicle towed to a repair shop. Continuing to drive could result in catastrophic engine damage and costly repairs.

Common Symptoms

• Engine cranks but will not start — this sensor is critical for ignition timing
• Engine stalling while driving (dangerous — can cause loss of power steering and brakes)
• Check Engine Light on
• Intermittent starting problems (starts sometimes, then randomly won't start)
• Tachometer erratic or not working during cranking

Possible Causes

• Faulty crankshaft position sensor — heat-related failure, often fails when engine is hot and works again when cool
• Damaged or corroded wiring/connector at sensor — sensor is often near exhaust manifold, wiring insulation melts over time
• Cracked or broken reluctor ring/flexplate teeth — sensor cannot read crank position
• Excessive air gap between sensor and reluctor ring (out of spec)
• Faulty PCM (rare)
• Broken timing belt or chain — engine won't start AND sensor code sets because crank signal is absent

Common Fixes

• Replace crankshaft position sensor — often 1-bolt and 1-connector job, but location can be hard to reach ($80-300 including labor)
• Repair damaged wiring/connector at sensor ($50-200)
• Replace flexplate or reluctor ring if damaged ($800-2000, requires transmission removal)
• Check timing belt/chain — if broken, major engine repair may be needed ($500-3000)

Estimated Repair Cost

These are estimated costs based on generic repair data. Actual costs may vary depending on your vehicle, location, and labor rates.

Explore Repair Costs

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