What Does P0336 Mean?
The crankshaft position sensor A signal is present but outside the expected range or is performing erratically. The ECM is seeing an inconsistent or noisy CKP signal that does not match the expected pulse pattern for the engine's reluctor ring. The driver may experience rough idle, intermittent misfires, hesitation during acceleration, or occasional stalling.
Common Causes
30%
Damaged or worn teeth on the crankshaft reluctor ring causing irregular pulse spacing or amplitude
25%
Incorrect air gap between CKP sensor and reluctor ring due to sensor movement or ring runout
25%
Worn or failing CKP sensor producing weak or distorted signal output
10%
Electromagnetic interference or shielding damage on the CKP sensor wiring
10%
Excessive crankshaft end play or harmonic balancer wobble causing variable air gap
Diagnostic Steps
1
Monitor engine RPM on live data at idle — erratic or jumping RPM readings (more than ±50 RPM fluctuation) confirm the CKP signal quality issue.
2
Use an oscilloscope on the CKP sensor output to observe the waveform while the engine idles — look for consistent amplitude, uniform pulse spacing, and no dropout areas that would indicate tooth damage or air gap issues.
3
Inspect the reluctor ring (tone wheel) for physical damage, debris buildup, or cracked teeth — on many engines this is part of the harmonic balancer and can be inspected from underneath.
4
Check the CKP sensor mounting for looseness and verify the air gap is within spec (typically 0.5–1.5mm) using a non-magnetic feeler gauge.
5
Inspect the harmonic balancer for separation of the rubber isolator — a slipped outer ring changes the reluctor ring position relative to TDC and alters the signal pattern.
6
Compare the CKP sensor resistance to specification and check for proper voltage output amplitude — a weak magnetic sensor may read correct resistance but produce insufficient signal voltage at low RPM.
Estimated Repair Cost
$100 - $600
Parts + labor, varies by vehicle and location
The crankshaft position sensor A signal is present but outside the expected range or is performing erratically. The ECM is seeing an inconsistent or noisy CKP signal that does not match the expected pulse pattern for the engine's reluctor ring. The driver may experience rough idle, intermittent misf...
The most common cause of P0336 (Crankshaft Position Sensor A Circuit Range/Performance) is: Damaged or worn teeth on the crankshaft reluctor ring causing irregular pulse spacing or amplitude
Typical repair costs for P0336 range from $100 to $600, depending on the vehicle, location, and whether you do it yourself or go to a shop.
Drive with caution. While the engine runs, timing accuracy is compromised, which can cause misfires and rough running. There is a risk of stalling at low speeds or idle. If the condition worsens, the engine may stall unexpectedly. Avoid highway driving if stalling symptoms are present.
Start by connecting an OBD2 scanner to read the code and any freeze frame data. Then follow the diagnostic steps specific to P0336 to identify the root cause.
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Quick Info
Category
Powertrain
System
Ignition System
Difficulty
Type
Generic (SAE)
Recommended Tools
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