What Does P02C2 Mean?
The ECM has detected that the individual fuel trim correction for cylinder 11 has reached its maximum enrichment limit. This means the PCM is adding as much extra fuel as it can to cylinder 11, but it still cannot achieve the target air/fuel ratio. The driver may notice rough running, reduced power, or elevated exhaust emissions, particularly under load.
Common Causes
35%
Restricted or partially clogged fuel injector on cylinder 11 reducing fuel delivery
25%
Intake manifold vacuum leak at cylinder 11 runner causing lean condition
20%
Low fuel pressure or weak fuel pump not meeting demand at high-cylinder-count engines
12%
Faulty injector driver circuit or wiring harness issue to cylinder 11
8%
Compression loss on cylinder 11 causing incomplete combustion
Diagnostic Steps
1
Monitor cylinder 11 individual fuel trim via live data — values near +25% or higher confirm max enrichment compensation.
2
Perform a fuel injector balance test or relative compression test via scan data to compare cylinder 11 contribution against other cylinders.
3
Check fuel pressure with a mechanical gauge at the fuel rail — spec is typically 55-62 PSI at idle for direct injection systems; compare against manufacturer specification.
4
Inspect the wiring harness and connector at the cylinder 11 injector for corrosion, damaged pins, or chafing — measure injector resistance (typically 11-18 ohms for high-impedance injectors).
5
Perform a cylinder leakdown test on cylinder 11 — less than 10% leakage is acceptable; listen at intake, exhaust, and crankcase for leak location.
Estimated Repair Cost
$200 - $900
Parts + labor, varies by vehicle and location
The ECM has detected that the individual fuel trim correction for cylinder 11 has reached its maximum enrichment limit. This means the PCM is adding as much extra fuel as it can to cylinder 11, but it still cannot achieve the target air/fuel ratio. The driver may notice rough running, reduced power,...
The most common cause of P02C2 (Cylinder 11 - Fuel Trim at Max Limit) is: Restricted or partially clogged fuel injector on cylinder 11 reducing fuel delivery
Typical repair costs for P02C2 range from $200 to $900, depending on the vehicle, location, and whether you do it yourself or go to a shop.
Drivable in the short term, but continued operation risks catalytic converter damage from the lean/rich cycling. Extended driving may cause elevated emissions and potential cylinder damage. Have it diagnosed within a few days.
Start by connecting an OBD2 scanner to read the code and any freeze frame data. Then follow the diagnostic steps specific to P02C2 to identify the root cause.
OBDHut Mobile App
Scan codes directly from your car with the OBDHut app.
Coming Soon
Quick Info
Category
Powertrain
System
Fuel System
Difficulty
Type
Generic (SAE)
Recommended Tools
OBD2 Scanner
A quality scan tool helps you read codes, view live data, and clear faults.
