P0336: Crankshaft Position Sensor A Circuit Range/Performance

What P0336 tells you, and what it does not

This code sets when the crank sensor circuit produces a signal that is present but does not match the pattern the computer expects, such as gaps in the tooth pattern arriving at the wrong intervals. It usually points to a sensor gap problem or a damaged reluctor wheel rather than a dead circuit.

The code sits in the crankshaft position sensing area and is reported by the comprehensive component monitor. It names the circuit or the condition where the computer saw a reading outside its expected range. It does not name a failed part, and several genuinely different faults set this same code, which is the whole reason the causes below are ordered rather than listed.

What people usually notice

• Intermittent rough running
• Occasional stalling
• Check engine light
• Hesitation at certain engine speeds
• Erratic tachometer reading

What causes P0336?

The causes below are ordered by how often they turn out to be the answer, cheapest and most common first. That order matters more than the list itself: the expensive component named in the code text is very rarely the first thing to replace, and working down from the top is what stops a crankshaft position sensing fault becoming an expensive guess.

Excessive air gap between the sensor and the reluctor wheel is the one to rule out before anything else. A gap outside specification weakens the signal enough to be misread as an implausible pattern.

Working out which cause it is

Start with freeze frame. Engine RPM at the fault shows whether the pattern issue only appears at a specific speed range. That snapshot is taken at the instant the code set, and it is the single most useful piece of evidence you have, which is also why clearing the code before reading it is such a costly habit.

This code is diagnosed by watching values change rather than by reading the number again, so the tool has to stream live data and hold freeze frame. A live scope trace comparing the crank signal pattern against the camshaft signal shows exactly where the two fall out of sync.

The order worth working in

• 1. Excessive air gap between the sensor and the reluctor wheel: A gap outside specification weakens the signal enough to be misread as an implausible pattern.
• 2. Worn timing chain or belt that has stretched, throwing the pattern out of sync with the camshaft signal: Chain stretch shifts the crank signal's relationship to the rest of the engine over time.
• 3. Damaged or missing teeth on the reluctor wheel: Physical damage to the tone ring produces gaps the computer cannot interpret correctly.
• 4. Sensor mounted slightly out of position after a repair: An incorrectly reinstalled sensor after other work can produce this exact fault.
• 5. Electromagnetic interference from nearby ignition wiring: Poorly routed or damaged ignition wiring can induce noise into the crank sensor signal.

What P0336 means for driving the car

Get it checked soon, since a degrading crank signal can progress to sudden stalling.

This is a severity 3 of 4 code, which means continuing to drive normally risks damage that costs considerably more than the repair in front of you. Treat the lamp as an instruction rather than a notification.

What does it cost to ignore P0336?

A degrading crank signal that produces this code can progress to a complete signal loss, which risks a sudden stall while driving.

There is also the diagnostic cost of waiting. Freeze frame data, pending code history and the readiness monitor state all describe the fault as it was when it set, and all of it is lost the moment somebody clears the code to make the lamp go out.