DTC C0327 Hummer
Post Catalyst Fuel Trim System Too Lean (Bank 2)
Post Catalyst Fuel Trim System Too Lean (Bank 2)
Description
Engine started, battery voltage must be at least 11.5v, all electrical components must be off, the ground between the engine and the chassis must be well connected, the exhaust system must be properly sealed between the catalytic converter and the cylinde
Cause and Solution
Oxygen sensor (before catalytic converter) is faultyOxygen sensor (behind catalytic converter) is faultyOxygen sensor heater (before catalytic converter) is faultyOxygen sensor heater (behind catalytic converter) is faultyCheck circuits
Video Guide
Diagnostic Info
- DTC Code: C0327
- Brand: Hummer