My 99’ Acura 3.0 Cl (6-cyl) was giving me code P0141 (downstream o2 sensor heater circuit) so I bought a new OEM Denso 234-4601 from Amazon and took it to a local reputable shop to do the replacement. When he went in to reset the code, the car started running very rough and gave ~10 error codes including one in the transmission. After the shop was unable to diagnose what was wrong, we towed it to the dealer where they said the PCM was fried. The local shop said they would cover some of the cost of the repair but wants to buy and install a used part. The dealer, though, wont go along. I’m not quite sure what to do from here.
- Can a bad O2 sensor cause the PCM to short?
- If not, how could the shop have shorted the PCM while installing an O2 sensor (it was a rainy day and they did the job outside. also, key was in ignition)?
- Could anything else be wrong with the car in addition to the fried PCM?
Im just trying to figure out where the responsibility lies. Any help would be greatly appreciated.
The dealer confirmed that the new O2 sensor was good. That leaves the responsibility with the shop. The shop offered to do a used PCM so I asked them to contribute what their cost would have been and will pay the dealer the difference to get it done correctly.