What is a reluctor ring?

The reluctor ring (tone wheel) is a toothed ring on the crankshaft. The sensor reads the teeth passing by to determine crank position and speed.

Can metal debris cause P0336?

Yes — magnetic sensors attract metal shavings from normal engine wear. Cleaning the sensor tip sometimes resolves P0336.

High Severity

Engine System

The crank sensor signal is irregular or intermittent. The ECM can read the sensor but the signal quality is poor.

Common Fix

Replace crankshaft position sensor

Estimated Cost (DIY)

$15 - $50

Failing crankshaft position sensorlikely

Damaged or dirty reluctor ringpossible

Excessive sensor air gappossible

Connector issuepossible

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What is a reluctor ring?: The reluctor ring (tone wheel) is a toothed ring on the crankshaft. The sensor reads the teeth passing by to determine crank position and speed.
Can metal debris cause P0336?: Yes — magnetic sensors attract metal shavings from normal engine wear. Cleaning the sensor tip sometimes resolves P0336.

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