engine malfunction reduced power

[mbhaddad]

I just got a new battery and about 10 miles later I started getting an engine malfunction error. The car was coded for the new battery and I've driven 300 miles since and keep getting the error and going into limp mode. Any idea what this could be? Also this was the day before a track day and the car continuously hit this error after the first lap of each session.

Mark

[IMG]

Hmm, I installed a new battery and no codding was required and no issues. Got it done at the dealer ? What codes are you getting when scanning your car ?

[mbhaddad]

The DME/DDE is showing 4 codes

27E4 - Underpressure pump Mastervac plausibility
2B57 - Motor Emergency Program activated
2796 - Electronic throttle controller adaption wrong.
CDC2 - Note sure what this is

I should note i also had the brakes flushed. And this error seems to point to a pressure sensor hose?

[BPMSport]

It's because of the brake fluid flush. There is a sensor under the reservoir, and if fluid spills on that, it will cause 27E4 and engine malfunction/limp mode. Clean up the area and replace that sensor, and you'll be good to go. Hope this helps!

[mbhaddad]

Looks like there was an o-ring on that sensor that got damaged somehow and caused this, replacing the o-ring and cleaning seems to be working so far. Thanks for the help!