I just replaced an O2 sensor on 99 bonneville. I had a check engine light, code p0133 slow response, and po300 mult/random misfire. After replacing sensor I still have cel, same codes plus p0134, no activity from sensor. I am getting .83 to .88 volts from sensor. No driveablity problems. Help

Joe

Check to make sure there is nothing wrong with the plug and wires. Also, can you can the car for live data? Might have a hard time finding a place that can do this. Where are you located, might be a member near by that can help out.

Saginw Michigan.

We have several members in Michigan, not sure if any have a scanner though. Perhaps someone will chime in.

i havez scanner..But saginaw is about a 2.5 hr drive..My buddy greg lives over by ann arbor ill see if he has one its a lil closer to ya

dan, couldnt this be like when the rear wire touch the sensor wires?

It could, and well worth a look. Generally when a high voltage wire is touching a sensor wire you get strange signals. But this seems to be a steady off signal. However, I don't know what kind of refresh rate his tester has. Mine refreshes at 2million per second, a DVOM wont have a rate any where near that. But should still show a spike.

CEL gone. Car running fine. Just need to be more patient. Thanks again for your help.

Got a 93 olds 88 (98k miles) that had a ticking sound on morning start up. Sound went away after 4 seconds. Three miles down road car began to run rough with louder ticking possibly a knock.Slight loss of power. Drove home. Car stalled once at traffic light but started back up. No check engine light, no smoke, no fluid loss, no overheating. Oil seems to look ok to my untrained eye.
I don't know what a blown engine, thrown rod or piston slap sounds like but am told these are possiblities. Any chance its something different/less expensive?

As always, I appreciated your knowledge.

Joe

it could be a lifter, is it a tick or a clank sound