P0336
Crankshaft Position Sensor A Circuit Range/Performance
Encountering the engine check light code P0336 signifies an explicit mechanical or electrical operational breakdown categorized as "Crankshaft Position Sensor A Circuit Range/Performance". Professional scanner tools usually flag this subsystem loop early on.
Driver's Summary
The diagnostic trouble code P0336 indicates an active fault in the crankshaft position sensor a circuit range/performance circuit or component. In practice, this fault causes engine cranks but will not start, stalling, misfires. This condition is classified as high severity. Prompt diagnosis is essential to prevent cascading damage to related components.
Symptoms
Engine cranks but will not start, stalling, misfires
Common Causes
- Damaged reluctor ring
- Faulty crankshaft position sensor
- Metal debris on sensor tip
- Loose sensor mounting
How to Fix
- 1 Replace crankshaft position sensor
- 2 Clean magnetic tip of the sensor
- 3 Inspect and replace reluctor ring
- 4 Tighten sensor mounting bolt
Technical Explanation
The ECM detects code P0336 by continuously monitoring the relevant sensor circuit against calibrated threshold values stored in its non-volatile memory. The PCM monitors crankshaft rotational velocity via the CKP sensor at a resolution of individual tooth gaps on the reluctor ring. A combustion event in each cylinder produces a measurable acceleration spike; its absence or weakness is flagged as a misfire event within a 200-revolution or 1000-revolution test window. The fault remains stored in memory even after the MIL is cleared; it becomes a confirmed DTC after failing two consecutive drive cycles, and the PCM logs a freeze frame record of the engine's exact operating state at the moment of detection.
Is It Safe to Drive?
With P0336 active, your engine or transmission is not operating within design parameters. Short-term driving may seem fine, but internal damage is accumulating — particularly to damaged reluctor ring.
Mechanic's Pro Tip
The most common mistake with P0336 is replacing the sensor without verifying the reference voltage and ground integrity first. Use a scan tool to monitor the sensor's live output; a truly failed sensor shows a stuck, flatlined reading — a sensor that fluctuates but reads slightly off usually indicates a wiring or vacuum issue, not a dead sensor. Always spray electrical contact cleaner on the connector pins before condemning the sensor.
Sensor replacement: $150 - $300; Reluctor ring: $400 - $600