P2336 code meaning
Cylinder 1 Above Knock/Combustion Vibration Sensor Threshold
Powertrain system Generic code P23xx codes Check engine light
What P2336 means
The engine module listens to the knock sensors and assigns each vibration burst to the cylinder whose combustion falls into that crank-angle window, so it can retard spark on one cylinder alone. P2336 means the knock intensity attributed to cylinder 1 has exceeded the calibrated threshold. Stellantis lists P2336 to P2339 in bulletin 09-009-26 (May 2026) for the plug-in hybrid 2.0L turbo four (sales code ECX) in the 2024–2025 Jeep Wrangler 4xe and 2023–2025 Grand Cherokee: with the MIL lit and audible knocking, machining debris and casting sand are named as the cause and the whole engine is replaced. GM and Saab file a single knocking cylinder under P0324 instead (more than 8 s). Lasting knock can damage pistons, so the code should be followed up soon.
P2336 at a glance
- Check engine lightYes, usually on
- Emissions testCan fail
- Limp modeNot expected
- Repair difficultyHard
- Typical labor0.5 to 13 hours
- Clears after repairAfter a drive cycle
Symptoms of P2336
- Check engine light on
- Knocking or pinging noise from the engine
- Less power because spark is retarded
Common causes of P2336
- PossibleEngine damage from machining debris or casting sand (Stellantis 2.0L PHEV, bulletin 09-009-26)
- PossibleCarbon deposits or hot spots in cylinder 1
- PossibleFuel with too low octane rating
- Less likelyCylinder 1 running lean (injector delivering too little)
Check the most likely causes first. Replacing parts by guesswork is the most expensive way to clear a code.
Parts involved
Knock sensorSpark plug
What each part of P2336 means
| P | Powertrain system: engine, fuel system, ignition, emissions and transmission. |
| 2 | Generic code (second SAE range): it means the same on every make. |
| 3 | Area: ignition system or misfire. |
| 36 | The exact fault in that area. |
What to do next
- Note P2336 and any other codes stored with it: several codes together often point to one cause.
- Check for loose connectors and damaged wiring around the parts the code names.
- Check open recalls for your car: some faults are fixed for free by the dealer. Enter your VIN.
- Clear the code only after the repair. If it comes back, the fault is still there.
Buying a used car? Scan it for stored codes before you pay. A recently cleared memory can hide a problem.
Questions about P2336
What does P2336 mean?
P2336 means "Cylinder 1 Above Knock/Combustion Vibration Sensor Threshold". The engine module listens to the knock sensors and assigns each vibration burst to the cylinder whose combustion falls into that crank-angle window, so it can retard spark on one cylinder alone. It is a generic code, so it means the same on every make.
Is it safe to drive with P2336?
Usually yes, for a short time, if the check engine light is steady and the car drives normally. If the light flashes or the car runs badly, stop and have it checked.
Will P2336 fail an emissions test?
Yes, it can. P2336 is emissions-related, so most inspection programs fail a car while it is stored or while the check engine light is on.
How hard is P2336 to fix?
Difficulty: hard. A typical repair takes 0.5 to 13 hours of work. This is a job for a workshop.
Will P2336 clear itself after the repair?
After the repair the car has to complete a drive cycle (a mix of city and highway driving) before the test runs again. Until then the readiness monitor shows "not ready", which can fail an inspection.