100% Free

No Scanner Needed

Carly logo
Prices

matteowolf1

Mini Countryman rough running issue

My 2010 Mini Countryman diesel has started running really rough. The check engine light is on. I scanned the error memory and it mentions something about 'reset quantity drift compensation'. I'm guessing this has something to do with the fuel injection and possibly a defective injector. Could this be the issue?

Summary of the thread

A 2010 Mini Countryman diesel was experiencing rough running and a check engine light, with an error code indicating 'reset quantity drift compensation.' This pointed to a potential issue with the fuel injection system, possibly a defective injector. Suggestions included checking airflow sensors and considering a temporary ECU reset. Ultimately, a mechanic confirmed a faulty injector, which was replaced, resolving the issue.

Did this summary help you solve your problem?

4 comment(s)

FelixWernerFan

Rough engine running on your Mini Countryman? Check engine light on... sounds like you're on the right track thinking about the fuel injection. First things first, have you checked the airflow sensors? A faulty sensor can mess with the fuel/air mixture and cause similar symptoms. Also, what's your fuel economy like? Has it gotten worse recently? Have you tried any fuel additives to clean the injectors? A simple reset procedure for the ECU might help temporarily, but it's probably a band-aid if an injector is actually defective. I would scan the error memory before proceeding.

matteowolf1 (community.author)

Thanks for the quick reply. Where exactly are the airflow sensors located, and is there a way to test them without special tools? Is there a specific reset procedure for the ECU you suggest?

FelixWernerFan

Okay, so the 'reset quantity drift compensation' error code pretty much confirms it's fuel injection related. As for the airflow sensors, they are located in the intake, directly after the air filter box. You'd ideally test them with a multimeter, but without tools, visually inspect them for any obvious damage or debris. As for the reset procedure, disconnecting the battery for about 30 minutes sometimes works, but honestly, with that error code, that sounds like a hardware issue. It looks like an injection valve/injector is defective. I'd suggest getting it to a workshop before you do much driving.

matteowolf1 (community.author)

Update on my Countryman. Took it to my trusted mechanic. They ran some onboard diagnostics and confirmed it was the reset quantity drift compensation related to a faulty injector, just like you suspected. Ended up costing me 515€, but she's running smooth as butter now. Thanks for the help!

rmh_community_comment_box_header

community_crosslink_scanner_headline

community_crosslink_scanner_intro

community_crosslink_scanner_title

community_crosslink_scanner_price

community_crosslink_rmh_headline

community_crosslink_rmh_intro

community_crosslink_rmh_title

community_crosslink_rmh_subtitle

community_crosslink_rmh_brand

MINI

community_crosslink_rmh_model

COUNTRYMAN