On Mar 8, 12:33 pm, wrote:
> Looking for opinions, I have an issue where the check engine light is
> coming on. I recently gave the car a tuneup which cleared the misfire
> codes it had, but now (1 week later), I have the following codes
> present:
>
> P1128 Long Term fuel trim too lean
> P0172 System Too Rich
> P0134 Oxygen Sensor Circuit - no activity detected (pre-converter
> sensor)
>
> I am guessing that the O2 sensor needs to be replaced, but will this
> also fix the other codes? I haven't detected any vacuum leaks that
> might be suspect. Any help would be appreciated. Thanks.

More info, it is a 1999 2.0L GL, new style. Thanks.