Question about BMW 325Ci

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Engine codes displayed on OBD tool

Help with engine codes displayed on OBD tool (no year option). 2003 BMW 325Ci. P1342,P1344,P1347,P1348, & P1350. All of these seem to do w/ misfire during start cylinders 1,2,3,4 & 5?? Also P0300(random multiple cylinder misfire). P0306(possible O2 sensor circuit malfunction Bank 1 Sensor 2)???? And last but not least, P1083(fuel control mixture lean bank 1 sensor 1) & P1085 (same as other), but has to do w/ bank 1 sensor 2???? Should I just push it off the side of a mountain?? Please tell me where to start? HELP??

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You might want to start with spark plugs. I'm not sure if that year has coil on plug ignition, but if it doesn't, spark plug wires are probably in order as well. Some of the O2 sensor faults could be caused by the poor ignition your mis-fires are causing. Sensor 1 is closest to the engine, sensor 2 is further away, on the other side of the Catalytic converter.

Posted on May 10, 2017

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Posted on Jan 02, 2017

SpotBert
  • 231 Answers

SOURCE: OBD II Location 07 Mountaineer

I'm going to take a guess and say likely to be in the passenger compartment. Sometime, they are near the glove box. You can also look under the driver side compartment. There should be a plastic protective cap. Use a flashlight.

Posted on Dec 24, 2008

  • 107 Answers

SOURCE: the computer says Random / muliple cylinder misfire detected

look for a vacuum leak

Posted on Feb 27, 2009

moparownr
  • 667 Answers

SOURCE: Help 10 codes on 323i!

These codes will have to be cleared and the car driven through a drive cycle, maybe a couple of times, is the check engine light off? Also you should check your MAF sensor it may need to be cleaned or replaced and makes sure there are no holes in your intake tubing. Hope this helps, let me know.

Posted on Dec 15, 2009

  • 462 Answers

SOURCE: engine system too lean (bank 1 , bank 2 )

Usualy this happens when you have vacuum leak after air flow meter , bad flow meter or temperature sensor.Actually for this problem I would take car to mechanic shop.

Posted on Apr 18, 2010

  • 1796 Answers

SOURCE: I have a Mercedes s500

Hi!!
What all this codes have in common is that every single one of them can be caused by a vacuum leak, so carefully check for cracked, loose or disconnected vacuum hoses, wiring to the coils, fuel pressure regulator, fuel injectors, specially on cylinder 2.

  • PO100 - Possible causes are wiring harness failure, air leak or defective hot film MAF sensor
  • PO130 - Vacuum leak
  • PO170 - PO173 - Possible causes are air ingress (leak), fuel injector failure, pressure regulator failure or mechanical wear of engine. Inspect and repair as necessary.
  • PO300 - possible causes are vacuum leak, wiring harness failure or ignition coil defective.
  • PO302 - If limit value for misfire "harmful to TWC" is exceeded, the MIL flashes immediately. If too many combustion misfires occur in one cylinder, the cylinder is switched off (cylinder selective fuel shut off). After the affected cylinders are shut off, the MIL changes from flashing to continuously lit until next time the engine is started. If combustion misfires are recognized, the fault code P0460 or P0462 is set if fuel tank level is too low (fuel reserve indicator light is on). Combustion misfires due to a shortage of fuel are recognized by means of this additional information.

NOTE:After cylinder cut-out system is turned off, the system monitors (through misfire detection) if all intake and exhaust valves are open again.
NOTE:Misfiring may be caused by many faults in the fuel injection system. Usually a misfiring fault is stored with faults pertaining to other components. An engine mechanical fault could also cause a misfire condition.
Good Luck!! A HELPFUL - 4 THUMBS - rating for this solution would be greatly appreciated. Thank you for using FixYa.

Posted on Dec 03, 2010

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system to lean bank 2 the following link courtsy of obd-codes.com
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Fuse box diagram for a 2004 BMW 325ci


Fuses & RelaysThe fuse box is located under the engine hood on the left side, near the upper strut housing or near the battery.
Various relays are also mounted on the fuse box for easy accessibility.



Flashers
The flashers are located behind the bottom center of the lower instrument trim panel.



Review the...
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BMW 325ci - Car cuts off on very hot days - Error code P00128


Check the following :

BMW Code PO128
This means that the engine's PCM detected that the engine has not reached the required temperature level within a specified amount of time after starting the engine. The intent of the P0128 code is to indicate a faulty thermostat. Similar codes: P0125
In determining the engine did not reach a "normal" temperature, it takes into account the length of time the vehicle has been running, the intake air temperature (IAT) sensor reading, the engine coolant

temperature (ECT) sensor reading, and the speed of the vehicle.

You will likely not notice any drivability problems other than the MIL illumination.
A code P0128 may mean that one or more of the following has happened:
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  • Leaking or stuck open thermostat
  • Faulty cooling fan (running too much)
  • Faulty coolant temperature (ECT) sensor
  • Faulty intake air temperature (IAT) sensor
solutions
Past experience indicates that the most likely solution is to replace the thermostat. Verify coolant strength & level
  • Verify proper cooling fan operation (check if it's running more than it should). Replace if necessary.
  • Verify proper engine coolant temperature (ECT) sensor operation, replace if necessary.
  • Verify proper intake air temperature (IAT) sensor operation, replace if necessary.
  • If the above items check out good, replace the thermostat

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