P2337Cylinder 2 Above Knock/Combustion Vibration Sensor Threshold
- Generic OBD-II code · Powertrain
- Turns on the check-engine light
- Matters for the ITP
- Needs a drive cycle to confirm a fix
- How the car detects it
- P2337 is the cylinder 2 entry of the per-cylinder knock series P2336–P2347. Using crank position, the engine module splits the knock sensor signal into one window per combustion event and compares the vibration level in cylinder 2's window with its threshold; above it the code is stored and spark for that cylinder is pulled back. The only manufacturer document found that names it is Stellantis bulletin 09-009-26 for the 2.0L turbo plug-in hybrid engine of the Jeep Wrangler 4xe and Grand Cherokee 4xe: it extends the engine warranty without time or mileage limit, requires a lit MIL plus one of P2336–P2339, blames debris and foundry sand left in the engine and replaces it completely. One cylinder alone over the limit points to a local cause rather than poor fuel, which would hit all cylinders.
- What you may notice
- MIL on
- Audible knocking, especially under load
- Reduced power or sluggish acceleration
- Likely causes
- PossibleInternal damage from debris left in the engine (Stellantis 2.0L PHEV)
- PossibleDeposits on piston or valves of cylinder 2
- RareWrong or worn spark plug in cylinder 2
- RareMechanical noise falling into cylinder 2's knock window
- Inspection (ITP)
- Matters for the ITP. While the check-engine light is on, the car fails the emissions check.
- Repair
- Hard · Usually a job for a workshop.Typical cost: €0 – €8,000
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.