BMW ECU Error Codes Described (Pxxx codes as well)

Can you help with this code?
27BB Fuel system diagnostic bank 2

Thanks

Hi guys

Can someone please tell me in simple terms what the below means... Other than my car is knackered!

2739 - Secondary air Mini-HFM electr Diagnostic
27C5 - Secondary air mini-HFM Plausibility

Thansk for your help.

M

27BB - P0174

[btable=100][btrhead=FFFFFF][btd]27BB - P0174[/btd][btd][/btd][/btrhead][btrhead=FFFFFF][btd]Information saved in[/btd][btd]DME[/btd][/btrhead][btrhead=FFFFFF][btd]Fault code[/btd][btd]27BB - P0174[/btd][/btrhead][btrhead=FFFFFF][btd]Fault text[/btd][btd]Fuel system, lambda/charge plausibility, bank 2[/btd][/btrhead][btrhead=FFFFFF][btd]Fault description[/btd][btd]System Too Lean (Bank 2)[/btd][/btrhead][btrhead=FFFFFF][btd]Condition for fault identification[/btd][btd]Test condition: Deviation from mean value (depending on psau, lam, aq) in percent is determined and compared with the max. deviation (in relation to rpm/load factor) KF_FPLAU_OBD_LAM_DELTA_ML_MAX[/btd][/btrhead][btrhead=FFFFFF][btd][/btd][btd]Terminal condition: Engine running[/btd][/btrhead][btrhead=FFFFFF][btd][/btd][btd]Voltage condition: None[/btd][/btrhead][btrhead=FFFFFF][btd]Condition for fault memory entry[/btd][btd]10000 ms[/btd][/btrhead][btrhead=FFFFFF][btd]Action in service[/btd][btd]1. Check the fuel system for leaks[/btd][/btrhead][btrhead=FFFFFF][btd][/btd][btd]2. System test routine[/btd][/btrhead][btrhead=FFFFFF][btd][/btd][btd]3. HFM and charge path must be flawless.[/btd][/btrhead][btrhead=FFFFFF][btd][/btd][btd]4. Defective fuel pressure sensor[/btd][/btrhead][btrhead=FFFFFF][btd]Fault effect and breakdown warning[/btd][btd]MIL on after engine runs 2x[/btd][/btrhead][btrhead=FFFFFF][btd]Driver information[/btd][btd]Warning light: MIL[/btd][/btrhead][btrhead=FFFFFF][btd]Service instruction[/btd][btd]None[/btd][/btrhead][/btable]


27BB - P0174

[btable=100][btrhead=FFFFFF][btd]27BB - P0174[/btd][btd][/btd][/btrhead][btrhead=FFFFFF][btd]Information saved in[/btd][btd]DME[/btd][/btrhead][btrhead=FFFFFF][btd]Fault code[/btd][btd]27BB - P0174[/btd][/btrhead][btrhead=FFFFFF][btd]Fault text[/btd][btd]Fuel system, lambda/charge plausibility, bank 2[/btd][/btrhead][btrhead=FFFFFF][btd]Fault description[/btd][btd]System Too Lean (Bank 2)[/btd][/btrhead][btrhead=FFFFFF][btd]Condition for fault identification[/btd][btd]Test condition: Deviation from mean value (depending on psau, lam, aq) in percent is determined and compared with the max. deviation (in relation to rpm/load factor) KF_FPLAU_OBD_LAM_DELTA_ML_MAX * expansion factor (KL_FPLAU_OBD_LAM_CSS_F)[/btd][/btrhead][btrhead=FFFFFF][btd][/btd][btd]Terminal condition: Engine running[/btd][/btrhead][btrhead=FFFFFF][btd][/btd][btd]Voltage condition: None[/btd][/btrhead][btrhead=FFFFFF][btd]Condition for fault memory entry[/btd][btd]10000 ms[/btd][/btrhead][btrhead=FFFFFF][btd]Action in service[/btd][btd]1. Check the fuel system for leaks[/btd][/btrhead][btrhead=FFFFFF][btd][/btd][btd]2. System test routine[/btd][/btrhead][btrhead=FFFFFF][btd][/btd][btd]3. HFM and charge path must be flawless.[/btd][/btrhead][btrhead=FFFFFF][btd][/btd][btd]4. Defective fuel pressure sensor[/btd][/btrhead][btrhead=FFFFFF][btd]Fault effect and breakdown warning[/btd][btd]MIL on after engine runs 2x[/btd][/btrhead][btrhead=FFFFFF][btd]Driver information[/btd][btd]Warning light: MIL[/btd][/btrhead][btrhead=FFFFFF][btd]Service instruction[/btd][btd]None[/btd][/btrhead][/btable]


27BB - P0175

[btable=100][btrhead=FFFFFF][btd]27BB - P0175[/btd][btd][/btd][/btrhead][btrhead=FFFFFF][btd]Information saved in[/btd][btd]DME[/btd][/btrhead][btrhead=FFFFFF][btd]Fault code[/btd][btd]27BB - P0175[/btd][/btrhead][btrhead=FFFFFF][btd]Fault text[/btd][btd]Fuel system, lambda/charge plausibility, bank 2[/btd][/btrhead][btrhead=FFFFFF][btd]Fault description[/btd][btd]System Too Rich (Bank 2)[/btd][/btrhead][btrhead=FFFFFF][btd]Condition for fault identification[/btd][btd]Test condition: Deviation from mean value (depending on psau, lam, aq) in percent is determined and compared with the max. deviation (in relation to rpm/load factor) KF_FPLAU_OBD_LAM_DELTA_ML_MAX[/btd][/btrhead][btrhead=FFFFFF][btd][/btd][btd]Terminal condition: Engine running[/btd][/btrhead][btrhead=FFFFFF][btd][/btd][btd]Voltage condition: None[/btd][/btrhead][btrhead=FFFFFF][btd]Condition for fault memory entry[/btd][btd]10000 ms[/btd][/btrhead][btrhead=FFFFFF][btd]Action in service[/btd][btd]1. Check the fuel system for leaks[/btd][/btrhead][btrhead=FFFFFF][btd][/btd][btd]2. System test routine[/btd][/btrhead][btrhead=FFFFFF][btd][/btd][btd]3. HFM and charge path must be flawless.[/btd][/btrhead][btrhead=FFFFFF][btd][/btd][btd]4. Defective fuel pressure sensor[/btd][/btrhead][btrhead=FFFFFF][btd]Fault effect and breakdown warning[/btd][btd]MIL on after engine runs 2x[/btd][/btrhead][btrhead=FFFFFF][btd]Driver information[/btd][btd]Warning light: MIL[/btd][/btrhead][btrhead=FFFFFF][btd]Service instruction[/btd][btd]None[/btd][/btrhead][/btable]


27BB - P0175

[btable=100][btrhead=FFFFFF][btd]27BB - P0175[/btd][btd][/btd][/btrhead][btrhead=FFFFFF][btd]Information saved in[/btd][btd]DME[/btd][/btrhead][btrhead=FFFFFF][btd]Fault code[/btd][btd]27BB - P0175[/btd][/btrhead][btrhead=FFFFFF][btd]Fault text[/btd][btd]Fuel system, lambda/charge plausibility, bank 2[/btd][/btrhead][btrhead=FFFFFF][btd]Fault description[/btd][btd]System Too Rich (Bank 2)[/btd][/btrhead][btrhead=FFFFFF][btd]Condition for fault identification[/btd][btd]Test condition: Deviation from mean value (depending on psau, lam, aq) in percent is determined and compared with the max. deviation (in relation to rpm/load factor) KF_FPLAU_OBD_LAM_DELTA_ML_MAX * expansion factor (KL_FPLAU_OBD_LAM_CSS_F)[/btd][/btrhead][btrhead=FFFFFF][btd][/btd][btd]Terminal condition: Engine running[/btd][/btrhead][btrhead=FFFFFF][btd][/btd][btd]Voltage condition: None[/btd][/btrhead][btrhead=FFFFFF][btd]Condition for fault memory entry[/btd][btd]10000 ms[/btd][/btrhead][btrhead=FFFFFF][btd]Action in service[/btd][btd]1. Check the fuel system for leaks[/btd][/btrhead][btrhead=FFFFFF][btd][/btd][btd]2. System test routine[/btd][/btrhead][btrhead=FFFFFF][btd][/btd][btd]3. HFM and charge path must be flawless.[/btd][/btrhead][btrhead=FFFFFF][btd][/btd][btd]4. Defective fuel pressure sensor[/btd][/btrhead][btrhead=FFFFFF][btd]Fault effect and breakdown warning[/btd][btd]MIL on after engine runs 2x[/btd][/btrhead][btrhead=FFFFFF][btd]Driver information[/btd][btd]Warning light: MIL[/btd][/btrhead][btrhead=FFFFFF][btd]Service instruction[/btd][btd]None[/btd][/btrhead][/btable]


27BB - P2179

[btable=100][btrhead=FFFFFF][btd]27BB - P2179[/btd][btd][/btd][/btrhead][btrhead=FFFFFF][btd]Information saved in[/btd][btd]DME[/btd][/btrhead][btrhead=FFFFFF][btd]Fault code[/btd][btd]27BB - P2179[/btd][/btrhead][btrhead=FFFFFF][btd]Fault text[/btd][btd]Fuel system, lambda/charge plausibility, bank 2[/btd][/btrhead][btrhead=FFFFFF][btd]Fault description[/btd][btd]System Too Lean Off Idle (Bank 2)[/btd][/btrhead][btrhead=FFFFFF][btd]Condition for fault identification[/btd][btd]Test condition: Deviation from mean value (depending on psau, lam, aq) in percent is determined and compared with the max. deviation (in relation to rpm/load factor) KF_FPLAU_OBD_LAM_DELTA_ML_MAX[/btd][/btrhead][btrhead=FFFFFF][btd][/btd][btd]Terminal condition: Engine running[/btd][/btrhead][btrhead=FFFFFF][btd][/btd][btd]Voltage condition: None[/btd][/btrhead][btrhead=FFFFFF][btd]Condition for fault memory entry[/btd][btd]10000 ms[/btd][/btrhead][btrhead=FFFFFF][btd]Action in service[/btd][btd]1. Check the fuel system for leaks[/btd][/btrhead][btrhead=FFFFFF][btd][/btd][btd]2. System test routine[/btd][/btrhead][btrhead=FFFFFF][btd][/btd][btd]3. HFM and charge path must be flawless.[/btd][/btrhead][btrhead=FFFFFF][btd][/btd][btd]4. Defective fuel pressure sensor[/btd][/btrhead][btrhead=FFFFFF][btd]Fault effect and breakdown warning[/btd][btd]MIL on after engine runs 2x[/btd][/btrhead][btrhead=FFFFFF][btd]Driver information[/btd][btd]Warning light: MIL[/btd][/btrhead][btrhead=FFFFFF][btd]Service instruction[/btd][btd]None[/btd][/btrhead][/btable]


27BB - P2179

[btable=100][btrhead=FFFFFF][btd]27BB - P2179[/btd][btd][/btd][/btrhead][btrhead=FFFFFF][btd]Information saved in[/btd][btd]DME[/btd][/btrhead][btrhead=FFFFFF][btd]Fault code[/btd][btd]27BB - P2179[/btd][/btrhead][btrhead=FFFFFF][btd]Fault text[/btd][btd]Fuel system, lambda/charge plausibility, bank 2[/btd][/btrhead][btrhead=FFFFFF][btd]Fault description[/btd][btd]System Too Lean Off Idle (Bank 2)[/btd][/btrhead][btrhead=FFFFFF][btd]Condition for fault identification[/btd][btd]Test condition: Deviation from mean value (depending on psau, lam, aq) in percent is determined and compared with the max. deviation (in relation to rpm/load factor) KF_FPLAU_OBD_LAM_DELTA_ML_MAX * expansion factor (KL_FPLAU_OBD_LAM_CSS_F)[/btd][/btrhead][btrhead=FFFFFF][btd][/btd][btd]Terminal condition: Engine running[/btd][/btrhead][btrhead=FFFFFF][btd][/btd][btd]Voltage condition: None[/btd][/btrhead][btrhead=FFFFFF][btd]Condition for fault memory entry[/btd][btd]10000 ms[/btd][/btrhead][btrhead=FFFFFF][btd]Action in service[/btd][btd]1. Check the fuel system for leaks[/btd][/btrhead][btrhead=FFFFFF][btd][/btd][btd]2. System test routine[/btd][/btrhead][btrhead=FFFFFF][btd][/btd][btd]3. HFM and charge path must be flawless.[/btd][/btrhead][btrhead=FFFFFF][btd][/btd][btd]4. Defective fuel pressure sensor[/btd][/btrhead][btrhead=FFFFFF][btd]Fault effect and breakdown warning[/btd][btd]MIL on after engine runs 2x[/btd][/btrhead][btrhead=FFFFFF][btd]Driver information[/btd][btd]Warning light: MIL[/btd][/btrhead][btrhead=FFFFFF][btd]Service instruction[/btd][btd]None[/btd][/btrhead][/btable]


27BB - P2180

[btable=100][btrhead=FFFFFF][btd]27BB - P2180[/btd][btd][/btd][/btrhead][btrhead=FFFFFF][btd]Information saved in[/btd][btd]DME[/btd][/btrhead][btrhead=FFFFFF][btd]Fault code[/btd][btd]27BB - P2180[/btd][/btrhead][btrhead=FFFFFF][btd]Fault text[/btd][btd]Fuel system, lambda/charge plausibility, bank 2[/btd][/btrhead][btrhead=FFFFFF][btd]Fault description[/btd][btd]System Too Rich Off Idle (Bank 2)[/btd][/btrhead][btrhead=FFFFFF][btd]Condition for fault identification[/btd][btd]Test condition: Deviation from mean value (depending on psau, lam, aq) in percent is determined and compared with the max. deviation (in relation to rpm/load factor) KF_FPLAU_OBD_LAM_DELTA_ML_MAX[/btd][/btrhead][btrhead=FFFFFF][btd][/btd][btd]Terminal condition: Engine running[/btd][/btrhead][btrhead=FFFFFF][btd][/btd][btd]Voltage condition: None[/btd][/btrhead][btrhead=FFFFFF][btd]Condition for fault memory entry[/btd][btd]10000 ms[/btd][/btrhead][btrhead=FFFFFF][btd]Action in service[/btd][btd]1. Check the fuel system for leaks[/btd][/btrhead][btrhead=FFFFFF][btd][/btd][btd]2. System test routine[/btd][/btrhead][btrhead=FFFFFF][btd][/btd][btd]3. HFM and charge path must be flawless.[/btd][/btrhead][btrhead=FFFFFF][btd][/btd][btd]4. Defective fuel pressure sensor[/btd][/btrhead][btrhead=FFFFFF][btd]Fault effect and breakdown warning[/btd][btd]MIL on after engine runs 2x[/btd][/btrhead][btrhead=FFFFFF][btd]Driver information[/btd][btd]Warning light: MIL[/btd][/btrhead][btrhead=FFFFFF][btd]Service instruction[/btd][btd]None[/btd][/btrhead][/btable]


27BB - P2180

[btable=100][btrhead=FFFFFF][btd]27BB - P2180[/btd][btd][/btd][/btrhead][btrhead=FFFFFF][btd]Information saved in[/btd][btd]DME[/btd][/btrhead][btrhead=FFFFFF][btd]Fault code[/btd][btd]27BB - P2180[/btd][/btrhead][btrhead=FFFFFF][btd]Fault text[/btd][btd]Fuel system, lambda/charge plausibility, bank 2[/btd][/btrhead][btrhead=FFFFFF][btd]Fault description[/btd][btd]System Too Rich Off Idle (Bank 2)[/btd][/btrhead][btrhead=FFFFFF][btd]Condition for fault identification[/btd][btd]Test condition: Deviation from mean value (depending on psau, lam, aq) in percent is determined and compared with the max. deviation (in relation to rpm/load factor) KF_FPLAU_OBD_LAM_DELTA_ML_MAX * expansion factor (KL_FPLAU_OBD_LAM_CSS_F)[/btd][/btrhead][btrhead=FFFFFF][btd][/btd][btd]Terminal condition: Engine running[/btd][/btrhead][btrhead=FFFFFF][btd][/btd][btd]Voltage condition: None[/btd][/btrhead][btrhead=FFFFFF][btd]Condition for fault memory entry[/btd][btd]10000 ms[/btd][/btrhead][btrhead=FFFFFF][btd]Action in service[/btd][btd]1. Check the fuel system for leaks[/btd][/btrhead][btrhead=FFFFFF][btd][/btd][btd]2. System test routine[/btd][/btrhead][btrhead=FFFFFF][btd][/btd][btd]3. HFM and charge path must be flawless.[/btd][/btrhead][btrhead=FFFFFF][btd][/btd][btd]4. Defective fuel pressure sensor[/btd][/btrhead][btrhead=FFFFFF][btd]Fault effect and breakdown warning[/btd][btd]MIL on after engine runs 2x[/btd][/btrhead][btrhead=FFFFFF][btd]Driver information[/btd][btd]Warning light: MIL[/btd][/btrhead][btrhead=FFFFFF][btd]Service instruction[/btd][btd]None[/btd][/btrhead][/btable]

27C5 - P2430

[btable=100][btrhead=FFFFFF][btd]27C5 - P2430[/btd][btd][/btd][/btrhead][btrhead=FFFFFF][btd]Information saved in[/btd][btd]DME[/btd][/btrhead][btrhead=FFFFFF][btd]Fault code[/btd][btd]27C5 - P2430[/btd][/btrhead][btrhead=FFFFFF][btd]Fault text[/btd][btd]Air-mass sensor, secondary air, plausibility[/btd][/btrhead][btrhead=FFFFFF][btd]Fault description[/btd][btd]Secondary Air Injection System Air Flow/Pressure Sensor Circuit (Bank 1)[/btd][/btrhead][btrhead=FFFFFF][btd]Condition for fault identification[/btd][btd]Test condition: sls_obd_max after 10 sec. SLS operation under KL_SLS_OBD_HFM_DIAG_MIN or after 20 sec. SLS_operation sls_obdh_mdf_max_intg_norm < K_SLS_OBDH_EUV_MIN_DEF and higher exhaust gas lamda[/btd][/btrhead][btrhead=FFFFFF][btd][/btd][btd]Terminal condition: Engine running[/btd][/btrhead][btrhead=FFFFFF][btd][/btd][btd]Voltage condition: Battery voltage > 10.8 V (k_sls_obd_ub_min)[/btd][/btrhead][btrhead=FFFFFF][btd]Condition for fault memory entry[/btd][btd]30000 ms[/btd][/btrhead][btrhead=FFFFFF][btd]Action in service[/btd][btd]1. Remove secondary air line from secondary air pump[/btd][/btrhead][btrhead=FFFFFF][btd][/btd][btd]2. Conduct test routine[/btd][/btrhead][btrhead=FFFFFF][btd][/btd][btd]3. If secondary air pump runs/air flows out, and error is still logged, replace the mini-HFM[/btd][/btrhead][btrhead=FFFFFF][btd]Fault effect and breakdown warning[/btd][btd]MIL is on after 2x engine cold start[/btd][/btrhead][btrhead=FFFFFF][btd]Driver information[/btd][btd]Warning light: MIL[/btd][/btrhead][btrhead=FFFFFF][btd]Service instruction[/btd][btd]None[/btd][/btrhead][/btable]

Dannys M3 wrote

Can you help with this code?
27BB Fuel system diagnostic bank 2

Thanks

27BB - P0174, Post-91

F16RCE wrote

Hi guys

Can someone please tell me in simple terms what the below means... Other than my car is knackered!

2739 - Secondary air Mini-HFM electr Diagnostic
27C5 - Secondary air mini-HFM Plausibility

Thansk for your help.

M

2739 - P2430, Post-60
27C5 - P2430, Post-92

Two different codes, but kind of look like the same thing. They share the same "P" code.

Great thread. THanks.

something about these:
271C
2761
2762
Vanos ???

thanks

Hi,

Can anybody help me?
I got these codes on my 2011 M3:
5A72
5A73
5A74
The transmission is acting up.
Thanks,

27C9 - P0160

[btable=100][btrhead=FFFFFF][btd]27C9 - P0160[/btd][btd][/btd][/btrhead][btrhead=FFFFFF][btd]Information saved in[/btd][btd]DME[/btd][/btrhead][btrhead=FFFFFF][btd]Fault code[/btd][btd]27C9 - P0160[/btd][/btrhead][btrhead=FFFFFF][btd]Fault text[/btd][btd]Oxygen sensor behind catalytic converter, bank 2, signal[/btd][/btrhead][btrhead=FFFFFF][btd]Fault description[/btd][btd]O2 Sensor Circuit No Activity Detected (Bank 2 Sensor 2)[/btd][/btrhead][btrhead=FFFFFF][btd]Condition for fault identification[/btd][btd]Test condition: Sensor voltage lank_us_b2 > K_LANK_USM and lank_us_b2 < K_LANK_USF for at least K_LANK_DIAG_OL_T[/btd][/btrhead][btrhead=FFFFFF][btd][/btd][btd]Terminal condition: Engine running[/btd][/btrhead][btrhead=FFFFFF][btd][/btd][btd]Voltage condition: Battery voltage > 9V (k_ed_ubmin)[/btd][/btrhead][btrhead=FFFFFF][btd]Condition for fault memory entry[/btd][btd]16 sec.[/btd][/btrhead][btrhead=FFFFFF][btd]Action in service[/btd][btd]1. Check plug and wiring harness on post-cat sensor LSNK B2[/btd][/btrhead][btrhead=FFFFFF][btd][/btd][btd]2. If OK replace sensor[/btd][/btrhead][btrhead=FFFFFF][btd]Fault effect and breakdown warning[/btd][btd]MIL on after engine runs 2x[/btd][/btrhead][btrhead=FFFFFF][btd]Driver information[/btd][btd]Warning light: MIL[/btd][/btrhead][btrhead=FFFFFF][btd]Service instruction[/btd][btd]None[/btd][/btrhead][/btable]

Some help on this: 2712 and what does the CDB6 mean exactly?

271C - P000C

Information saved in
DME

Fault code
271C - P000C

Fault text
VANOS control, intake bank 2

Fault description
'A' Camshaft Position Slow Response (Bank 2)

Condition for fault identification
Test condition:
Oscillating controller > 3.0 °Crankshaft
Terminal condition: Terminal 15
Voltage condition:
Battery voltage > 9V (k_ed_ubmin)

Condition for fault memory entry
1

Action in service

Clear fault memory, VANOS system test
Check valves, check adjuster

Fault effect and breakdown warning
MIL on after engine runs 2x

Driver information
Warning light:
MIL

Could someone explain a 279F error please.

alpina-527 wrote

Could someone explain a 279F error please.

Are you sure it is 279F? My BMW ISTA software does not show that code. It has 279E, but not "F".

HenryTav wrote

Are you sure it is 279F? My BMW ISTA software does not show that code. It has 279E, but not "F".

Yes, definitely 279F

I found reference to output fan A, but I've no idea what that is

alpina-527 wrote

Yes, definitely 279F

I found reference to output fan A, but I've no idea what that is

That is weird, since my BMW software is updated until 05/14... What's the production year of your car? Let me know and I will check some sources I have. Also, it is an E92 right?

HenryTav wrote

That is weird, since my BMW software is updated until 05/14... What's the production year of your car? Let me know and I will check some sources I have. Also, it is an E92 right?

Yes, it's a 2008 E92 M3

alpina-527 wrote

Yes, it's a 2008 E92 M3

Ok, I found it.

There are two descriptions for this code.

1. 00279F DME: Activation , Fan A
a. It can be the electric cooling fan that is not operating properly. How I would diagnose it? A primitive way to test it - if you do not have the BMW scanner or any other scanner that can activate the cooling fan and hear it functioning - would be turning the AC on and check if the fan kicks in. After some time, parked and engine running warm, you should hear the fan increasing the speed. The E92 M3’s fan is very loud when it is activated at maximum speed (hot weather and AC on).

2. 00279F : Map Thermostat Mechanism
a. The thermostat opens when the engine is too hot and allows the cooler fluid to refrigerate the engine. The car PCM (powertrain control module) monitors how efficient the coolant system is working. One plausible situation is, for example, when the engine is hot, the computer activates the electric fan and the engine does not cool down, the computer might interpret it as the thermostat is not operating properly. Also, the PCM (powertrain control module) might assume the fan is not operating as it should.
b. How to test it? Monitor the engine coolant temperature. It is difficult to do it on M3 because the instrument cluster does not have a gauge for engine coolant temperature, only engine oil temperature. But, If you have any scanner, you might be able to check the coolant temperature. It should be around 200 to 210 Fahrenheit within several minutes.
Worth to mention: Thermostat issues were very common on old e46s and BMW used the same terminology to indicate coolant issues. I had cases where replacing the thermostat would cure the problem.

I hope I was able to help!

Regards,

Wow, this thread will be awesome after it's finished being compiled... Great job..

were do i get the first series of numbers prior to the error code? for ex 27bo . .etc

is there any way to look up any kind of fault that could arise or is related to codes p0301 and p0491

Honestly, I didn't get your question "first numbers prior the error code?". Can you be more specific?
Now, P0301 is a generic code for cylinder number 1 misfire and P0491 is Secondary Air Injection System Insufficient Flow (Bank 1). More information is needed to give you "a direction" to go with this.

Finmysta wrote

Wow, this thread will be awesome after it's finished being compiled... Great job..

Nice set-up! Two Beemers! Beautiful cars!