ImpalaWhile undergoing many facelifts in its history, the Impala has proved itself to both civilians and police forces as one of the most capable 4-door cars GM has ever offered. Currently moving towards its 10th generation the Impala is one of the longest lasting and popular models.
This is my brother's car and he asked me for some help. He had his computer scanned at a parts store and they told him his O2 sensors were bad. Wanted to have as much info as possible before I start troubleshooting since I'm not familiar with the car. If I decide to swap out the sensors, is AC Delco worth the extra money or are Bosch replacements OK?
I got to see my brothers car today. The "Service vehicle soon" message is showing on dashboard. I scanned the OBD2 connector and got no codes. I would suspect if his O2 sensors were bad, the "check engine" light would come on instead of the service vehicle soon light anyway. I don't know why the shop he visited said he needed Os sensors. I saw their diagnostic report, and there are no codes listed, just a quote to change the O2 sensors.
According to his owners manual, if the service vehicle soon message appears, you must visit the dealer, or there is a problem with a trunk safety system. I'm pretty sure the car doesn't have this safety system on it.
After a little research I suspect the Body Control Module (BCM) is turning on the light. Does this BCM have a diagnostic connection and would an Auto Zone or similar place be able to diagnose or pull codes?
no, autozone or any other parts store wont be able to read BCM codes. you'll most likely have to got to a dealer to get those codes as those codes can only br read with a tech II scanner. the only place i've seen with a tech II is a dealer. you dont have to take it to a chevy dealer, any GM dealer will have a tech II scanner.
2001 impala, 3.4, 1.0dhp pcm, fenderwell intake w/k&n filter, 2.5" downpipe-exhaust w/flowmaster 40, 17" helo slick rims, LED tail lights/front turn signals, multi color led LS cluster/ hvac controls, impala embroidered floormats, 20% tint, aftermarket moonroof, turn signal mirrors