Code Definition

P2336 (23) — Cylinder 1 Above Knock Threshold (Knock Limit Exceeded)

System: Powertrain  |  Type: Generic (OBD-II Standard)  |  Make: Generic

About P2336

P2336 is a generic (obd-ii standard) powertrain diagnostic trouble code. It belongs to the P-prefix family of codes, which covers engine, transmission, emissions, or fuel-system faults.

Scanning & clearing: A generic OBD-II scan tool will usually read and clear powertrain (P) codes. For live data, freeze-frame capture, and bi-directional tests you may need a more capable scan tool that supports the vehicle's ECM protocol.

Because P2336 is a generic OBD-II code, its base definition is shared across manufacturers. The specific diagnostic steps, reference values, and repair procedures can vary by vehicle, and the TaT Diagnostic Assistant includes verified procedures submitted by working technicians.

Code Information

The Engine Control Module continuously monitors combustion knock for each cylinder using one or more knock sensors and retards ignition timing when it detects knock. DTC P2336 sets when the ECM determines that the knock intensity for cylinder 1 has exceeded the calibrated knock control limit even though timing retard has been applied. This means abnormal combustion, or detonation, on cylinder 1 that the knock control strategy cannot fully correct, and it is typically detected under load or acceleration. Left unaddressed, sustained knock can damage the piston, rings, and bearings, so the driver...

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