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Discussion Starter #1
Heah Guys. I am a virginal owner of a 2005 M5 E60, which I bought approximately 1 month ago.

Shortly after buying I noticed she was a little lumpy occasionally and jerky... almost like a misfire. At the weekend the Engine management light came on and last night, after connecting it to a OBD II I bought, the following error codes were registering. All cylinder Misfire related.

P0301
P0302
P0303
P0404
P0305
P0300
P114B (Pending Fault)

I have contacted a BMW specialist and they seem to think its a ionic sensor fault (like a posh knock-sensor) or a wiring fault.

Just wondered if anyone has come across similiar issues, and could point me in the right direction. Any advise/suggestions would be most appreciated.

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Discussion Starter #2
Gutted - 120+ views and no replies. A BMW specialist seems to think it could be an air leak on Bank 1. Will report back
 

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Wow, missed this last week, not sure how.

The last code could be the cause of all the above.

Air leak isn't going to cause all those, IMO...it would have to be pretty serious. I would more suspect a failing/failed pre-cat O2 sensor. This error comes from the post cat sensor and indicates the mix is either to rich or lean after the cats.



277C - P114A Information saved in Fault code
Fault text
Fault description
Condition for fault identification
DME
277C - P114A
Oxygen sensor trim control diagnosis, bank 1
Post Catalyst Fuel Trim Via Oxygen Sensor System Too Rich (Bank 1)
Test condition:
LEAN suspected under consideration of P-component ((6 (K_LA_TRIM_P_ANZ_MAX) + 3 (K_LA_TRIM_DIAG_P_SCHW P-spikes)) leads to deliberate RICH/LEAN control activation;
if the pre-catalyst and post-catalyst oxygen sensors respond accordingly a trim control error is recognized.
Terminal condition: Engine running Voltage condition:
none
none
1) Check intake and exhaust systems for leaks; incl. HFM operation/ ..if no fault is present.. 2.) Conduct oxygen sensor test routine/ 3.) If the test does not produce any results and the trim control error is still present ->Replace the sensor before the catalytic converter
MIL on after engine runs 2x / no effects on drivability
Warning light: MIL
none
Condition for fault memory entry
Action in service
Fault effect and breakdown warning
Driver information
Service instruction
Information saved in Fault code
Fault text
Fault description
Condition for fault identification
DME
277C - P114B
Oxygen sensor trim control diagnosis, bank 1
Post Catalyst Fuel Trim Via Oxygen Sensor System Too Lean (Bank 1)
Test condition:
RICH suspected under consideration of I-component (( 2 (K_LA_TRIM_DIAG_I_MAX_SCHW) recognition of I- component limit) leads to deliberate RICH/LEAN control activation;
If the pre-catalyst and post-catalyst oxygen sensors respond accordingly a trim control error is recognized.
Terminal condition: Engine running Voltage condition:
none
none
1) Check intake and exhaust systems for leaks; incl. HFM operation/ ..if no fault is present.. 2.) Conduct oxygen sensor test routine/ 3.) If the test does not produce any results and the trim control error is still present ->Replace the sensor before the catalytic converter
MIL on after engine runs 2x / no effects on drivability
Warning light: MIL
none
Condition for fault memory entry
Action in service
Fault effect and breakdown warning
Driver information
Service instruction
 

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Discussion Starter #4
Thanks so much for taking the time to reply Jcolley.

I have ordered a Precat Lambda sensor which will arrive tomorrow. Will report back once she is on.

Thanks again.
 

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Discussion Starter #5
Hi Jcolley,

Well!!! Are you the man? I wouldn't mind your Paypal account to send you some cash to treat yourself to some beers/wine. :)

Replaced the sensor, cleared the fault codes and she drives perfectly. You were right. HOWEVER.:) One side effect to sorting the issue out is that now rather strangely the car will only change up a gear when over 3,000rpm. I have fiddled with the D1 and S1-S5 settings, but that makes no difference at all.

I did search the forums for anything that suggests what it might be and there was reference made to the SMG adaptation and 02 Lamda sensor offsets.

If you do happen to have any suggestions would be again most grateful.
 

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Discussion Starter #6
Hi Jcolley,

Well!!! Are you the man? I wouldn't mind your Paypal account to send you some cash to treat yourself to some beers/wine. :)

Replaced the sensor, cleared the fault codes and she drives perfectly. You were right. HOWEVER.:) One side effect to sorting the issue out is that now rather strangely the car will only change up a gear when over 3,000rpm. I have fiddled with the D1 and S1-S5 settings, but that makes no difference at all.

I did search the forums for anything that suggests what it might be and there was reference made to the SMG adaptation and 02 Lamda sensor offsets.

If you do happen to have any suggestions would be again most grateful.
 

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Ive been experiencing simmilare troubles, I.E p0301 etc all misfires,
had codes P2626 and 2629 O2 sensors faults come up, had both sensors replaced but the 2629 is still recurring.
Any ideas?
 
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