[Chrisred]

Been getting limp with jb4 on during wot. Codes are 2c31 & 2c32. Lambda probe in front of cat 1 & 2, trimming control. And misfires on multiple cylinders (4,5&6) Does this mean my o2 sensors have to be replaced?? Or is it just a catless related code?? I had dp fix on and these codes appeared all of a sudden. Now I removed it.

I also get shaking while cruising and rough idle. Sparks have being changed.

Also I believe there's 4 o2 sensors?? How do I know which ones to change?

[E92TTKING]

On bt cable I'm getting
2c7e 29f4 and 29f5

I'm curious as well
Bump

For 2c7e it says lambda probe behind catalytic converter bank 1

The other 2 say converter conversion

[benzy89]

I was having the same problems as you (Lambda Bank, o2 Sensor Fault Codes & Misfires) when I installed my DPs and started running my COBB Stg 2+ tune. Took them back to the guy who did my install, turns out the secondary sensors were backwards. Put in 6 new plugs, moved the ignition coils around & fixed the sensors, the cars been running fine & not a single fault code has come up

Make sure you have the same sensors (Black tipped vs Grey tipped) on the same DP. It's possible that the o2 Sensor readings are triggering the misfires. Depending on your mileage you might also want to change out your spark plugs & ignition coils.

[Chrisred]

I'm confident that my sensors are properly installed as I've been catless now for 2 years and all of a sudden I get these codes.

So it's probably coils/plugs......

[E92TTKING]

Originally Posted by Chrisred

I'm confident that my sensors are properly installed as I've been catless now for 2 years and all of a sudden I get these codes.

So it's probably coils/plugs......

Me too. I have had my dp installed for about a year and now these codes come up ever since I had a new full catback exhaust installed

[benzy89]

Originally Posted by Chrisred

I'm confident that my sensors are properly installed as I've been catless now for 2 years and all of a sudden I get these codes.

So it's probably coils/plugs......

Originally Posted by E92TTKING

Me too. I have had my dp installed for about a year and now these codes come up ever since I had a new full catback exhaust installed

It's possible during the CBE install someone broke a sensor, also possible that it just burnt out since it is an electronic device. If you're getting misfire codes & haven't changed anything, it's could be a combination of:

• Spark Plugs
• Ignition Coils
• Fuel Injectors
• Clogged Intake Valves

[Chrisred]

What does trimming control mean on the lambda codes?? if o2 sensors are fkd up, what code do we usually get!?

[benzy89]

Originally Posted by Chrisred

What does trimming control mean on the lambda codes?? if o2 sensors are fkd up, what code do we usually get!?

Here are the codes I got last week when the o2 Sensors were installed backwards on my DPs:

Fault Codes on Stage 2+ FMIC

• P0302 - Cylinder 2 Misfire
• PO301 - Cylinder 1 Misfire
• PO300 - Random/Multiple Cylinder Misfires
  
• P2C7F - Lambda Probe after catalytic converter 2, trimming control
• P29CE - Misfire, Cylinder 2
• P29CD - Misfire, Cylinder 1
• P29CC - Misfire, more cylinders
  
• P2C31 - Lambda probe

Fault Codes on Stage 0/Stock Tune:

• P2C7F - Lambda Probe after catalytic converter 2, trimming control
• P2C6A - Lambda Probe after catalytic reversed

"Trimming Control" means that the DME is altering your Air:Fuel Ratios to correct your emissions. Usually it'll lean them out & the car will start to misfire (I got misfires & the shakes any time I touched the gas).

[spiderx4]

i think i might have the same problem. just to make sure, on which dp does the black and grey sensor go on? thanks

[E92TTKING]

Originally Posted by spiderx4

i think i might have the same problem. just to make sure, on which dp does the black and grey sensor go on? thanks

grey is smaller one

[benzy89]

Originally Posted by spiderx4

i think i might have the same problem. just to make sure, on which dp does the black and grey sensor go on? thanks

Black on the Longer Pipe, Grey on the Short one

[spiderx4]

Originally Posted by benzy89

Black on the Longer Pipe, Grey on the Short one

thnks

[e90328i]

When my o2 sensor when out i got low voltage on bank 1 or some shit like that only had a check engine light car felt fine no limp..

[Chrisred]

Originally Posted by e90328i

When my o2 sensor when out i got low voltage on bank 1 or some shit like that only had a check engine light car felt fine no limp..

Good to know. Thanks. So mine prob is fine....

[Chrisred]

How many sensors is there in total? 4?

[benzy89]

Originally Posted by Chrisred

How many sensors is there in total? 4?

4 on the DPs: 2 front sensors & 2 rear sensors.

[Chrisred]

No sensors on mid pipe cats?

[andynr328xi]

bump

[ChuckD05]

Any resolution to this ?

[robc1976]

Originally Posted by E92TTKING

On bt cable I'm getting
2c7e 29f4 and 29f5

I'm curious as well
Bump

For 2c7e it says lambda probe behind catalytic converter bank 1

The other 2 say converter conversion

The conversion 1 & 2 codes are from catless pipes. I ad a lot of he symptoms in this thread and it was actually a fuel injector leaking. I checked my plugs and all but one where a good color...the leaking injector made the other plug black.

[Chrisred]

Just changed all my plugs and coils and all plugs were black. Also some residue around hole where plug inserts