First I have a 97 2.8QM AFC engine code. About a month ago I ran over a cattle guard that disconnected my flex pipe from my cat. During this occurance one of my O2 sensors snapped. Code verified this but I also had a bunch of crazy codes come up. I thought that maybe putting in a new cat and clearing the codes would take care of it. So I welded the flex pipe back to the cat and put in a new O2 sensor to replace the snapped one. I drove the car for about a block and the check engine light came on again. All the same codes reappeared minus the code for a broken O2 sensor. Here are the codes:

P1409 Tank vent value N80 - Electrical problem in circuit
P1400 Value for EGR N 18 Electrical problem in circuit
P1511 Intake manifold changeover value N156 Electrical problem in circuit
P0161 O2 heater Circuit Bank 2 sensor 2 electrical problem
P0141 O2 heater Circuit Bank 1 sensor 2 electrical problem
P0155 O2 heater Circuit Bank 2 sensor 1 electrical problem
P0153 O2 heater Circuit Bank 1 sensor 1 electrical problem

Does anybody have any idea as to what is going on here? Any suggestions on where I should start?

Also, my running lights and side markers only work when I turn the foglights on. This is not that big of a problem except that I have to drive with foglights on all the time. I have a new multifunction switch so I know that is not it. Has anybody heard of this happening before?

Thanks

 

My guess is you have a blown fuse, some broken wiring, or disconnected connectors.

They all point to an electrical issue - I would check to make sure all these items are getting power - they may all be getting power from the same connection. You sure you didn't leave anything unconnected?

First thing I would do, check for Fuse #29 (20 amp I believe), might be blown. If it is, replace it (buy more than one of these). Unplug all of your O2 sensors. Now start the car. If fuse doesn't blow then while running reconnect one at a time to isolate the problem. Also look at the Fuel Pump relay. power for these items go through this relay.

 

Thanks.

I will check the wiring diagrams I am pretty sure I did not leave anything disconnected because I was getting these codes before I changed the O2 sensor. I guess the possibility exists that some wiring got jarred loose when I bottomed out and seperated the flex pipe and cat. If they all have the same connector that would make sense.

Any guess on the problem with the side markers and taillights only working with fog lights on

 

did that lighting problem start after your incident as well?

 

No that started roughly 4 months ago. Every once in a while the fuses for the side markers and tailligths will blow and even with teh fog lights on I have nothing. If I replace the fuses the side markers will only work with fog lights on

 

Finally got time to look at my code issue. Like you said Brrman, it turned out to be fuse #29. Thanks