Engine malfunction

[datsm3]

Got an Engine Malfunction light tonight. Came on afte about a block driving out my house. Limited me to around 45 mph. Turned the car around and parked it. Started it up again a minute later, and it came on again.

What I did install was an IPE F1 exhaust. I did it on Sunday. Been driving the car everyday. Drove maybe almost 200 miles and got the light. Any ideas? Could the exhaust be it?

I'll have to check in the morning underneath. Maybe an O2 sensor wire melted, O2 sensor undid itself? Not sure. Just throwing it out there.

[xpunisherx]

IMO...really hard to say without hooking up to a tester and reading the error code. Recommend doing that first before speculating.

[datsm3]

Originally Posted by xpunisherx

IMO...really hard to say without hooking up to a tester and reading the error code. Recommend doing that first before speculating.

Yep. Borrowed a reader from my friend and will run tomorrow. Having the IPE exhaust, it's too loud to troubleshoot at 11pm LOL

[MFL]

You don't have to turn the car on to pull the codes, they're stored.

[xpunisherx]

Originally Posted by datsm3

Yep. Borrowed a reader from my friend and will run tomorrow. Having the IPE exhaust, it's too loud to troubleshoot at 11pm LOL

Right on. Let us know what you find out.

[datsm3]

Got the codes today:

P1209 - no dtc definition found - confirmed
P2298 - pending: O2 sensor out of range during deceleration bank 2 sensor 1 - pending
P1209 - no dtc definition found - pending

[BzsBimmer]

Are you sure you put the right O2's in the right place?

[datsm3]

Originally Posted by BzsBimmer

Are you sure you put the right O2's in the right place?

Yes. When I installed, I had the two pipes (stock and IPE) laying side by side. On top of that, the connectors for post and pre cat have specific connectors, so it's next to impossible to install incorrectly.

But definitely something worth bringing up. Thanks.

My game plan right now....

Car is still under warranty. I will bring it to the dealer to resolve the issue. Of course, remove the IPE exhaust first. I don't want them to turn me around due to catless system.

Once we figure that out, I'll post my results here. But also, I will get a proper tune by Alex at Alpine in LA (Great guy to work with BTW).

Thanks everyone.

[BzsBimmer]

2729 - P2298
Information saved in DME
Fault code 2729 - P2298
Fault text Oxygen sensor, coast-mode diagnosis before cat., bank 2
Fault description O2 Sensor Out of Range During Deceleration (Bank 2 Sensor 1)
Condition for fault identification Test condition: Oxygen sensor is available (via sensor temperature, no error code entries, etc.) but the AD value is less than 3398mV (K_LAVK_OBD_SA_SCHW) for a number of 2 (K_LAVK_OBD_SA_CNT) measurements
. Terminal condition: Engine running - overrun condition
. Voltage condition: none
Condition for fault memory entry none
Action in service 1. Check plug and wiring harness to pre-cat oxygen sensor LSVK B2 (focus on opens in wires for virtual ground and pumping current)
. 2. Replace oxygen sensor
Fault effect and breakdown warning MIL on after engine runs 2x
Driver information Warning light: MIL
Service instruction none

[BzsBimmer]

27E4 - P1209
Information saved in DME
Fault code 27E4 - P1209
Fault text Vacuum sensor, brake booster, plausibility
Fault description Brake Booster Pump Shutoff Valve Plausibility
Condition for fault identification Test condition: Constant violations of activation threshold or vacuum gradient is too low during activation
. Terminal condition: TERM87
. Voltage condition: none
Condition for fault memory entry 5000 ms
Action in service 1. Check ELUP fuse,
. 2. Check wires,
. 3. Replace ELUP
Fault effect and breakdown warning CC message
. Engine speed limited
. Reduced power
. MIL after engine runs 2x
Driver information Warning light: MIL, EML, CC message, backup program
Service instruction None

[BzsBimmer]

Giving credit to Regular Guy
http://www.m3post.com/forums/showthread.php?t=928325

[datsm3]

Originally Posted by BzsBimmer

27E4 - P1209
Information saved in DME
Fault code 27E4 - P1209
Fault text Vacuum sensor, brake booster, plausibility
Fault description Brake Booster Pump Shutoff Valve Plausibility
Condition for fault identification Test condition: Constant violations of activation threshold or vacuum gradient is too low during activation
. Terminal condition: TERM87
. Voltage condition: none
Condition for fault memory entry 5000 ms
Action in service 1. Check ELUP fuse,
. 2. Check wires,
. 3. Replace ELUP
Fault effect and breakdown warning CC message
. Engine speed limited
. Reduced power
. MIL after engine runs 2x
Driver information Warning light: MIL, EML, CC message, backup program
Service instruction None

This one is very interesting because the IPE F1 exhaust relies on vacuum lines from the brake booster to operate the actuator on the exhaust. I'll check for leaks.

[surlynkid]

Originally Posted by BzsBimmer

Are you sure you put the right O2's in the right place?

Impossible to mix up primary with secondary. The connectors are different. You can move side to side but that doesn't matter.

[BzsBimmer]

Originally Posted by surlynkid

Impossible to mix up primary with secondary. The connectors are different. You can move side to side but that doesn't matter.

I wasn't sure. coming from an e46 m3 so thought I'd throw it out.

[datsm3]

Figured issue out.

Culprit was a vacuum line. The IPE exhaust system relies on vacuum pressure for the flap actuators to operate. The line had about a 1/4" inch cut which leaked. What prompted me to find this needle in the haystack problem was every time I shut down the car, I heard a hissing sound coming from the rear of the car.

I cleared the codes, logged about 50 miles on the car and no reported check engine lights, reduced power (limp mode). All seems well for now.

Thank you BzsBimmer for helping to diagnose!

[WickedE93]

[datsm3]

Originally Posted by WickedE93

Thanks to the forum! This proves that us collaborating together resolves issues we may have with our cars. This forum rocks!

[Patrón]

Originally Posted by datsm3

Thanks to the forum! This proves that us collaborating together resolves issues we may have with our cars. This forum rocks!

agree, glad you fixed your problem.

[regular guy]

Originally Posted by BzsBimmer

Giving credit to Regular Guy
http://www.m3post.com/forums/showthread.php?t=928325

Thanks!

[BzsBimmer]

Credit goes to Regular Guy for his posts.
All I did was use the search button ;-)

Ha posted a few minutes after you did!

[BPMSport]

Also fyi for anyone else experiencing the vacuum fault.. A lot of times this fault will throw cars into limp mode that recently had a brake fluid flush or change. The sensor is located directly under the brake fluid reservoir and if any fluid gets on it, the car will keep getting thrown in limp mode. Seen it happen a number of times. Hope this helps.

[Stein]

Originally Posted by Mike Benvo

Also fyi for anyone else experiencing the vacuum fault.. A lot of times this fault will throw cars into limp mode that recently had a brake fluid flush or change. The sensor is located directly under the brake fluid reservoir and if any fluid gets on it, the car will keep getting thrown in limp mode. Seen it happen a number of times. Hope this helps.

Does the sensor need to be replaced? I just had my brake fluid flushed and the car has gone into limp mode twice in 5 days since then. Both times I turned the car off and on and it ran fine.