On board computer needed

Susanb

Test Drive
Location
Riverside county
Hiya folks. I drive a 2000 XE which runs great except it won't pass smog. Mechanic thinks she needs a new computer. Thing is, Nissan sez they don't make them anymore. I need some ideas where to find one. Thanks, Susan.
 

Susanb

Test Drive
Location
Riverside county
First code was intermittent random misfire but new timing belt fixed that. No it is Oxygen Sensor but mechanic says they look fine. I replaced a little over a year ago.

The check engine light is always on. It flashes sometimes. 240,000 miles. Original owner.
 

Prime

Shut up Baby, I know it!
Admin
Location
Denver Adjacent
Do you know what codes the check engine light is coming from? If you don't, you can take it to AutoZone, Advanced Auto Parts, or O'Reilly and get them to scan it for free. If you have the codes we can dive a bit deeper.
 

Susanb

Test Drive
Location
Riverside county
Finally got the diagnostic codes.
P0151
02 Sensor Circuit
Low Bank 2 Sensor 1
Then:
P0131
2 Sensor Circuit Low Voltage Bank 1 Sensor 1

Please advise. I Really love this car and need her to pass smog.
 

kirk

I'm Shady AF. Ask Anyone.
Moderator
Supporting Member
Location
Allen, Texas
I am late to the party, not sure how I missed the Notif, sorry prime.

But, i would be super super surprised if that is a computer issue. That code is almost always the O2 sensor. If you replaced the cats, whatever damaged those could have easily damaged the sensors. I would gamble that first for sure. change them, clear the codes, drive.

You can get a used ECM (on board computer) on eBay pretty easily.

But I really dont think thats the issue. Have you or your mechanic looked for damaged wires, etc?

Also, did it start showing these codes shortly after the cats were changed? Have you ever cleared them, driven then seen if they come back?

Gotta be those sensors
 

Susanb

Test Drive
Location
Riverside county
I am late to the party, not sure how I missed the Notif, sorry prime.

But, i would be super super surprised if that is a computer issue. That code is almost always the O2 sensor. If you replaced the cats, whatever damaged those could have easily damaged the sensors. I would gamble that first for sure. change them, clear the codes, drive.

You can get a used ECM (on board computer) on eBay pretty easily.

But I really dont think thats the issue. Have you or your mechanic looked for damaged wires, etc?

Also, did it start showing these codes shortly after the cats were changed? Have you ever cleared them, driven then seen if they come back?

Gotta be those sensors
I am thinking the sensors are first. At the start, Trixy wouldn't pass smog due to random misfire. Plus, there was loss of power on hill acceleration. Replaced the timing belt at 70 thou and the misfire.cleared up, car runs great. Now there are the O2 codes which had been masked by the misfire apparently per the dealership service dude.

The smog and repair shop mechanic thinks the sensors look good so he's reticent to replace. This is a smog and repair shop I am compelled to ude because of the no pass smog issue.

The front two cats were nearly completely plugged when replaced. Could barely see light through them. The sensors were replaced at same time. That will be two years in December.

I had the timing belt done at.the.dealership because the smog and repair ship weren't sure it was distributor or not that caused the intermittent random misfire code .

The dealership did something to the sensors with a flammable liquid. They described it as a super trick thing that only their mechanic knows how to do. I think it was a B.S. story they tell to women.

So, I am happy to do the sensors and hope we pass smog to get on with life.

Thanks for the support and I will be in touch. S-
 

Susanb

Test Drive
Location
Riverside county
Thanks. I found:
NTK:
downstream right. Bank 1. Sensor 2

Upstream right Bank 1. Sensor 1

Upstream left. Bank 2. Sensor 1

Downstream left. Bank 2 Sensor 2

These are all the NTK under Xterra 2000 v6 3.3 so I think this is it, right?

I am ordering but if I am wrong pls let me know and U will cancel. Thanks, I am learning...


Oh, and here is a code: 185388733167948560

Put that in the "how did you hear about us" box on checkout and save 5%.
 
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