Fault Family System: Powertrain (P-Codes) 12 SAE Codes

Cylinder Knock Threshold Exceeded

Diagnostic & Technical Explanation

P2336 (Cylinder 1 Above Knock/Combustion Vibration Sensor Threshold) records that the knock sensing system measured combustion vibration above the protection threshold in one specific cylinder — real detonation, not a sensor circuit fault. Carbon accumulation raising that cylinder's effective compression, a lean condition from a restricted injector on that hole, fuel of lower octane than the engine requires, and an overheating spot in the cooling jacket around that cylinder are the physical causes worth checking in order.

These 12 diagnostic trouble codes share one detection mechanism and one repair path, which is why MechanicDB groups them into a single authored fault family rather than repeating the same explanation 12 times.

Codes in this family (12)

Code	Definition	Repair coverage
P2336	Cylinder 1 Above Knock/Combustion Vibration Sensor Threshold	4 ranked fixes
P2337	Cylinder 2 Above Knock/Combustion Vibration Sensor Threshold	4 ranked fixes
P2338	Cylinder 3 Above Knock/Combustion Vibration Sensor Threshold	4 ranked fixes
P2339	Cylinder 4 Above Knock/Combustion Vibration Sensor Threshold	4 ranked fixes
P2340	Cylinder 5 Above Knock/Combustion Vibration Sensor Threshold	4 ranked fixes
P2341	Cylinder 6 Above Knock/Combustion Vibration Sensor Threshold	4 ranked fixes
P2342	Cylinder 7 Above Knock/Combustion Vibration Sensor Threshold	4 ranked fixes
P2343	Cylinder 8 Above Knock/Combustion Vibration Sensor Threshold	4 ranked fixes
P2344	Cylinder 9 Above Knock/Combustion Vibration Sensor Threshold	4 ranked fixes
P2345	Cylinder 10 Above Knock/Combustion Vibration Sensor Threshold	4 ranked fixes
P2346	Cylinder 11 Above Knock/Combustion Vibration Sensor Threshold	4 ranked fixes
P2347	Cylinder 12 Above Knock/Combustion Vibration Sensor Threshold	4 ranked fixes

What this page does not show

This page publishes the fault mechanism and the code index. The licensed dataset adds, for every one of the 15,886 codes, the full authored repair set (56,729 procedures in total) with the fields deliberately withheld here:

Procedures 2..n after the first-listed procedure
Aftermarket parts cost ranges in USD (est_parts_cost_min/max_usd)
Professional labor-hour estimates (est_labor_hours)
Step-by-step diagnostic and repair instructions
Replacement-part mappings and catalog lookups
6,637 manufacturer-specific OEM codes across 32 makes ($149 tier)

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