P0336
Crankshaft Position Sensor A Circuit Range/Performance
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The P0336 code indicates that the crankshaft position sensor (CKP) is sending a signal that is erratic or outside the expected range for engine operation. Unlike P0335 (which indicates a complete circuit failure), P0336 means the sensor is communicating but its signal pattern doesn't match what the ECM expects for the current engine speed and conditions.
The crankshaft position sensor is one of the most critical sensors on your engine. It tells the ECM exactly where each piston is in its rotation cycle, which is essential for proper fuel injection timing and ignition timing. When this signal is unreliable, you may experience misfires, hard starting, stalling, and rough running. In some cases, the engine may refuse to start entirely.
This code should be addressed within the week because an unreliable CKP signal can cause the engine to stall without warning — potentially in a dangerous situation like highway driving. The most common fix is replacing the CKP sensor, which is usually accessible on the front or side of the engine near the crankshaft pulley. It's often a straightforward DIY repair. However, if the reluctor ring (tone wheel) is damaged, that's a more involved repair that typically requires professional attention.
Severity
Symptoms
- •Engine misfires or runs rough
- •Difficulty starting the engine or extended cranking
- •Engine stalls unexpectedly, especially at idle
- •Check Engine light is on
- •Noticeable hesitation or stumbling during acceleration
- •Tachometer needle may fluctuate erratically
Likely Causes
The CKP sensor has degraded due to heat and age, producing an erratic or out-of-range signal that doesn't match expected crankshaft rotation patterns.
The tone wheel (reluctor ring) on the crankshaft is damaged, has missing teeth, or has accumulated metallic debris, causing irregular signal patterns.
Damaged, corroded, or loose wiring or connectors between the CKP sensor and ECM are causing intermittent signal dropouts or noise.
Worn thrust bearings allowing excessive crankshaft movement can change the air gap between the sensor and reluctor ring, affecting signal quality.
The ECM may have an internal fault, or nearby electrical components may be creating electromagnetic interference that corrupts the CKP signal.
Estimated Cost
Professional Repair
Includes parts + labor
Common Fixes
- Replace the crankshaft position sensor
- Inspect and clean the reluctor ring of debris
- Repair or replace damaged wiring and connectors
- Check and correct the sensor-to-reluctor air gap
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