P1336 Code: Crankshaft Position System Variation Not Learned
🟠 Moderate severity · drivable
The engine usually runs normally, but the check engine light stays on until the crankshaft relearn is done.
What P1336 means
P1336 is a manufacturer-specific code. On GM vehicles it means the engine computer has not learned how the crankshaft position sensor signal lines up with the pistons, which usually happens after the sensor or timing parts were replaced. On Honda and Acura vehicles the same code points to a crankshaft position sensor signal that drops out or is out of range.
Symptoms
- Check engine light is on
- Engine cranks but won't start (sensor-related cases)
- Engine stalls or runs rough (more common on Honda and Acura)
- Code returns right after clearing until the relearn is done
Common causes
- most common: Crankshaft variation value was never re-learned after the sensor, timing chain, or engine work (GM)
- common: Damaged wiring or a loose connector at the crankshaft position sensor
- common: Faulty crankshaft position sensor
- less common: Low or disconnected battery erased the learned value
- less common: Worn timing components or excessive crankshaft runout
- rare: Faulty engine computer (ECM)
How to fix it
| Fix | DIY? | Typical cost |
|---|---|---|
| Run a crankshaft position system variation learn (relearn) with a scan tool (GM) | Mechanic | $80–150 |
| Inspect and repair the crankshaft sensor wiring and connector | Yes | $20–60 |
| Replace the crankshaft position sensor | Yes | $50–200 |
| Replace worn timing components if the relearn keeps failing | Mechanic | $300–900 |
Frequently asked questions
Can I drive with P1336?
Usually yes. On GM vehicles the engine typically runs fine, but the light stays on and the relearn should be done so emissions checks pass. If the engine stalls or won't start, don't drive it.
What does the P1336 relearn mean on GM vehicles?
After parts like the crankshaft sensor or timing chain are replaced, the computer must relearn how the crank signal lines up with the pistons. A scan tool runs this procedure in a few minutes, and driving alone usually won't clear the code.
What does P1336 mean on a Honda or Acura?
On Honda and Acura cars, P1336 usually points to the crankshaft position sensor circuit itself, such as a bad sensor or damaged wiring, instead of a relearn. Testing the sensor signal is the next step.
Related codes
P0335
P0335 Code: Crankshaft Position Sensor Circuit Malfunction
P0336P0336 Code: Crankshaft Position Sensor A Circuit Range/Performance
P0016P0016 Code: Crankshaft Position - Camshaft Position Correlation (Bank 1 Sensor A)
Updated 2026-08. This page is informational and not a substitute for professional diagnosis.