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-   -   Mini Cooper S 2007 O2 sensor (http://forums.pelicanparts.com/mini-discussion-forum/1020471-mini-cooper-s-2007-o2-sensor.html)

Stechnic77 02-08-2019 05:48 AM

Mini Cooper S 2007 O2 sensor
 
Mini cooper with 2ac2 code
o2 sensor before cat plausibility
Voltage 1.52 volts which is to high / Down stream voltage at .04 at idle
Acceleration upstream voltage is 2.4/ Down stream voltage is at .9
Already Replace the map sensor, maf sensor

Anybody have this problem

Luccia at Pelican Parts 02-18-2019 12:32 PM

2AC2: O2 sensor (bank, sensor 1) mixture too lean.

What symptoms are you experiencing? Does it hesitate when you accelerate? How many miles are on your R56? Any other lights on the dash? Did you replace the o2 sensor?

I have seen this code before with a bad cat, but there were a few other codes as well as an ECL light & loss of acceleration when stepping on the accelerator. Replaced that, along with both sensors and new spark plugs and all was resolved.


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