hi all, i have a code 55 in my 93 se, and the haynes says it'* an o2 sensor or ecm, and this site just says "ecm". what does that mean, that i have a bad ecm?? cuz the car seems to run fine, i just have that stupid engine light on all the time. i reset the codes once and the light stayed off for a few hours, but came back on again after about 15 minutes of driving. again, the car seems to run and drive fine i just have no idea what to do about this code. thanks for the help!!

O2 would be 44 or 45. 55 does indicate a problem with the PCM. At this point, I'd be tempted to simply disconnect and reconnect the PCM a few times. Each connector (disconnect the battery for 30 minutes, play with the connectors, re-connect the PCM, then reconnect the battery).

You may just have some corrosion on a connector for a PCM ground.

where is the ecm located on these cars again? thanks.

Passenger side floor. Remove the kick panel and you should see the big thin silver box.

so it is a possibility that the ecm can be bad even if the car runs perfectly fine?? thats pretty crappy :( any other ideas? thanks.

unfortunately i dont... not sure what i can do now cuz this thing wont pass inspection without that light staying off, and if i cant figure out whats wrong then im kinda stuck. any other suggestions? just got the car and this kinda sucks... thanks guys

I have a suggestion. You have a bunch of NE members up there. We could arrange some help and a swap maybe? What about the Aviator?

Actually passenger side up under the dash.


Good luck,
Sellncars