Questions & Answers for: GMC post catalyst Computers & Internet

...without a jump. All the pressures were fine. I fixed the starting problem by cleaning the battery posts and no more need for jumps. I've been told the problem is the EGR system. Truck symptoms as

...Post-catalyst Fuel Trim System Bank 1 Check your Oxygen Sensor Heater Circuit, could be dirty or loose wires or just stop working. Usually you have 4 of these under your car so check all. Fault Code ...

...a dead miss. If the state of tune and the compression is good, then you'll likely need a cat. I've posted the drive cycle just so you know what to do when you have resolved the code. Cold Start. In ...

Catalyst Monitor B1 Failed test. First find out what damaged the catalytic converter in the first place and fix that. Then drive it and check the front O2 sensor and post cat sensor. Front should vary

...engine light just came on today. Tank is not overfilled, and cap is tight. ...

...Catalyst System Low Efficiency Bank 2 bank 1 means , that bank that contains cylinder #1 where is cylinder #1 it on all V engines, that cylinder that is MOST forward. all cyl 1 are offset front never ...