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P1085 – Fuel control limit mixture too lean (Bank 2 Sensor 1)
P1345 – Misfire Cylinder 2 with Fuel Cut-off
P0174 - System to Lean (Bank 2)
P0171 - System too Lean (Bank 1)
Check the intake boot and MAF sensor.
I am getting you more details.
Your vehicle is running lean and the ECM is noticing that problem. Therefore it is sending a signal to RICHEN the mixture. You are having an unmetered air leak in the system.
How is oil entering the intake system?
There is no oil in the intake. The intake meter is giving ECU the signal to increase the fuel.
The ECU think the engine is running lean therefore it up the fuel supply to the injectors.
Also there is a recall on the igition coils
Can you see if you coil is made by BREMI or BOSCH?
I am sending the campaign letter.
The code for the misfire is from the coil.
The other codes are about fuel mixture.
Therefore please look into the hoses and connectors along the intake. Make sure they're ok.
Please also inspect the ignition coil.
On the affected vehicles, check the manufacturer of the ignition coils. If BREMI coils are found, replace them with Bosch ignition coils.
E39 with M54 from 09/02 up to 07/03
E53 (X5) with M54 from 09/02 up to 12/04
E65/E66 with N62/N73 from 09/01 up to 12/04
E85 (Z4) with M54 from 09/02 up to 12/04
E83 (X3) with M54 from 09/03 up to 12/04
In order to remedy this situation
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I have all Bosch coils. Should I still replace the coil once I find the misfiring cyl?
Yes, replace #2 coil with BMW# XXXXX (Bosch made)
I am sending you another BMW campaign regarding the Engine Wiring Harness Section Replacement for Ignition Coils.
October 2002 Service Engineering
PERFORM THE PROCEDURE OUTLINED IN THIS SERVICE INFORMATION ON ALL AFFECTED VEHICLES BEFORE CUSTOMER DELIVERY OR THE NEXT TIME THEY ARE IN THE SHOP FOR MAINTENANCE OR REPAIRS.
SUBJECTEngine Wiring Harness Section Replacement for Ignition Coils
MODELE46 325i and 330i with M54 engine
E39 525i and 530i with M54 engine
SITUATIONCertain 2003 model year BMW automobiles with M54 engines incorporate an engine harness that may have electrical connectors with a contact force below specifications.
AFFECTED VEHICLESThis Service Action involves E46 3 series and E39 5 series vehicles with M54 engines which were produced from 9/02/02 9/11/02.
In order to determine if a specific vehicle is affected by this Service Action, it will be necessary to utilize the "Service Menu" of the DCS (Dealer Communication System). Based on the response of the system, either proceed with the corrective action or take no further action.
The Chassis Number Ranges listed are only for informational purposes and are not to be considered as the only deciding factor.
CORRECTIONReplace the engine wiring harness section for ignition coils on all affected vehicles.
PROCEDUREReplace the engine wiring harness section for ignition coils as outlined in repair manual group 12, section 12 51100.
You should also change the spark plugs if you haven't done so.
Make sure they're Bosch.