Hey guys, could use some more brains on this issue.

I have cobb ap v2 with v403 stage 3 SF installed with supporting mods. 2008 MR.


Randomly got an ACD failure this winter, thought it was an actual ACD pump failure.
Shortly after I got p2253 [primary o2 high voltage] p0138 [secondary o2 high voltage] along with u0167[immobolizer comm error] all at the same time.

I'm having trouble figuring out why they would all come on at the same time, I really doubt both o2 sensors failed mechanically at the exact same time so Im thinking there might be a software or can bus issue here and was wondering if anyone came across anything like this, I've done some extensive searches but nothing solid came up.

I've had a look at the wiring for both o2 sensors, looks solid. Updated the AP today 2/19/2014 and reflash v403 -- same codes.

Any diagnostic tips?

 

Resolved:

I removed my AXXESS ASWC unit for steering wheel control with aftermarket decks and it was messing with my CAN BUS system.

I highly recommend not using these devices... they're electronics are shotty at best. More like turds in my opinion.


ACD still dead however, I now have STFT and LTFT's.

 

Try removing the negative terminal from the battery, push the brake pedal for a few seconds, and wait for 5 minutes before hooking the negative terminal back up. This should reset everything in the car, hopefully your ACD comes back.
-Chris

 

Not to revive an old thread, but this person's problem is exactly like mine. I just got my AWC Pump replaced under the new warranty extension 10y/100k. I took it to the dealer with COBB Flashed to stage2 93oct. Once I got it back, I could toggle my AWC switch on the steering wheel, and I am stuck only on Tarmac. I get trouble code U1067 - immobilizing communication error. There is also an unnamed error code that just says "ECU" with no details.

Chris, should I follow your instructions above to reset everything in the car with the ECU still flashed to Stage 2, or tune back to Stock before-hand?

I did not have this issue with toggling my AWC switch before my AWC service light went on.

 

The dealer may have tried to flash your ECU, there is a new flash they are pushing. Every time I take mine in, I put a piece of tape over the OBD2 port that says "do not flash" just in case.

 

I have the U0167 Immobilizer communication error after flash in the std map.. the others all functions only how to solve this U0167 code?. it was not there before i flash in the std map

 

Hi, just wanted to thank you for sharing your experience. I bought a 2006 Land Rover LR3 from an auction. It was dropped off with NO KEY and a drilled out ignition switch. Little bit of "magic" and it won't start but turns on. Pulled the codes. And it said 2 Oxygen sensors bank 1 and 2 I think. And u0167 "lost communication with immobilizer control module". I am embarrassed to say that I ASSUMED both O2 sensors going out at the same time was a Land Rover thing. And that the 067 was due to not having a good fob... 5 months later, I stumbled upon your post.... I don't know if my Rover has any updated or upgrades. I know it last ran October, 2022. And it has 134k mi. I was also towed and tampered with. And still dont have a fob for it (mechanic ran off with my repair money - ugh.) Anyways, all this to say thank you for broadening my vision to other possible causes!

"After you've eliminated the impossible, whatever remains, no matter how improbable, is the truth." Sherlock Holmes