Questions & Answers for: Chevrolet TrailBlazer code for 300

...code po440 .i changed gas cap and turned off the chech engine light... i made 300 miles and it was good and today morning i drove a mile and light turned on ..... what do i have to fix ...thanks OBD ...

code 174 and 171 on failed emissions inspections chk engine light comes on car rev's bounce between 300 and 500 when sitting idle sorry i don't understand your codes. There not the OBD2 codes from ...

...code 300 and code 506. Thank you. This P0506 code is one that's sometimes triggered on vehicles that have electronic throttle control. That is, they don't have a regular throttle cable from ...

...shifted to just over 2000 RPM. Has anyone else had this happen? What could it be? SCAN IT FOR VSS CODES AND. TRANSMISSION CODES.FOR TORQUE CONVERTER FAULT CODES OR SHIFT VALVES CODES.IF ALL IS GOOD ...

code(s) (like P0340) for you on that. It might be the cam position actuator as well. Either way - these are both quite easy - the cost of the parts - roughly $30-$35 for the CPS and around $275 - $300

...300-350 to 129 Big drop! run code check and look for map, mass air flow sensor, tps codes. don't pay a lot of attention if O2sensor comes up with any of them, unless it's the only code. Even so check ...

...are no leaks showing. I would take it to autozone or another major parts store they can scan it for codes to see if there is something wrong. I have a car that the service engine light comes on, and ...

...code P0410, air pump problem, the problem could be a bad air pump, a air check valve that is on the side of the engine head or even both. in some rare cases a bad 02 sensor can trick the system into ...

...code 300 it was code 301 now it just throwing code 300 just changed plugs the codes need to be cleared also did you replace plug wires or coil packs? codes need to be erased every time a repair is ...

...Code 300 means you have a random miss that is not serious enough to pick one cylinder. The computer measures RPM on each cylinder as the plug fires. So it is not that a cylinder is not firing but ...