I have a 97 Gmc Safari it runs just fine had the plugs,wires,cap,rotor just replaced at 100k.. I took it for the e-check and got all kinds of codes P0134,P0135,P0146,P0147,P0300,P1133.. Ive seen that most of the codes are O2 sensors. Should I replace all 3 of the O2 sensors and could this have caused the P0300 multiple cylinder misfire ??? Thanks
2007-07-22 04:35:40 · 6 answers · asked by lstpmpkn 1 in Cars & Transportation ➔ Maintenance & Repairs
I suggest clearing the codes by disconnecting the battery for 45 seconds then driving it for a few trips to see what codes re-set and then attend to only those codes. The cyl misfire codes are not directly related to any 02 sensor codes but the tune up likely cured that code.
2007-07-22 04:43:09 · answer #1 · answered by Vince J 5 · 0⤊ 0⤋
Generally clearing codes is NOT recommended for OBDII vehicles, but the practice does happen and is useful in some situations, take note the vehicle cannot pass an emission certification test until the system monitors complete ( all will be reset and have to complete w/ code reset), this may take 2-10 drive cycles to complete. It is useful to record the codes and also get freeze frame data from the PCM to correctly diagnose the issue . codes that show rich or lean conditions are fuel and/ or air delivory related @ fuel or air leak, vacuum leak, leaking injector, etc.and can cause a P0300 code, diagnose lowest code first then move on.
2007-07-22 07:06:26 · answer #2 · answered by Perry F 5 · 0⤊ 0⤋
don't replace the o2 sensors, yet. please have it actually checked out. to have all your o2 sensors going out at the same time is not likely. have a professional check it out. more then likely they are all related. i would get that done before addressing the p0300 code as too many things could cause a random missfire. good luck
2007-07-22 04:40:56 · answer #3 · answered by pmurph76 1 · 1⤊ 0⤋
what most people dont realize is that O2 sensors wear out like spark plugs and should be changed every couple of years. I would recommend changing them and clearing the codes and see if PO300 resets itself....good luck
2007-07-22 04:41:35 · answer #4 · answered by Christian 7 · 0⤊ 0⤋
may be just memory codes that were set before the tune-up.. have them cleared then road test in all conditions and see what codes if any return then diagnose
2007-07-22 04:41:13 · answer #5 · answered by John St.Louis 5 · 1⤊ 0⤋
run, get remote from that vehicle, look out, save your self now....................................O... i'm hoping you're nevertheless alive, that vehicle is doomed, merely call a towing business enterprise, and enable them to humanaly get rid of that vehicle for you!
2016-10-09 05:56:26 · answer #6 · answered by Anonymous · 0⤊ 0⤋