What causes GM code 65?

Leaking right bank injector or high fuel pressure Saturated charcoal canister or stuck purge Faulty fuel pressure regulator Contaminated or biased O2 sensor

How do I fix GM code 65?

Read codes with a paperclip jumper and check for black exhaust smoke Check fuel pressure and leak down Inspect the regulator vacuum line for raw fuel Check the air filter and purge valve operation Test the O2 sensor cross counts on a scan tool Repair the fuel fault before replacing the sensor

65 Right Bank O2 Sensor Rich Exhaust Indicated

Q: What does GM code 65 mean?

GM code 65. Right Bank O2 Sensor Rich Exhaust Indicated. Applies to 1988-1995 Corvette, Camaro, C/K trucks with dual exhaust.

Make: GM (1982-1995)
Category: Powertrain - Fuel/Air Metering
Severity: Check Engine Light
Applies to: 1988-1995 Corvette, Camaro, C/K trucks with dual exhaust

How to read it

Code 65 reads as 6 flashes, pause, 5 flashes on the check-engine light. Jump terminals A and B on the ALDL connector with the key off, then turn the key on with the engine off and count the check-engine flashes.

What does GM code 65 mean?

65. Right Bank O2 Sensor Rich Exhaust Indicated. This code sets when your vehicle computer detects right bank o2 sensor rich exhaust indicated.

Common causes of 65

Leaking right bank injector or high fuel pressure
Saturated charcoal canister or stuck purge
Faulty fuel pressure regulator
Contaminated or biased O2 sensor

How to fix 65

Read codes with a paperclip jumper and check for black exhaust smoke
Check fuel pressure and leak down
Inspect the regulator vacuum line for raw fuel
Check the air filter and purge valve operation
Test the O2 sensor cross counts on a scan tool
Repair the fuel fault before replacing the sensor