Check engine light bmw 325i code 340

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Check the fuses.

BMW 3 Series E46 Fuses and Relay Diagrams

bmwguide.net https://bmwguide.net > 3 Series > E46

Jan 17, 2023 - The main fuse box is located in the glove compartment. You will see two white latches (left and right) that need to be turned to open the fuse ...

Fuse and relay box diagram BMW 3 E46

fusesdiagram.com https://fusesdiagram.com > BMW

Fuse box diagram BMW 3 E46 ; 6. Reversing lamp/s relay ; F1. (30A) Ignition coils-320i with MS43/325i/330i ; F2. (30A) Engine control module (ECM), reversing lamp/ ...

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It could be the electric fan that cools the radiator is not working correctly check to seevthat it comes on when the car Warms up.
check for loose connections or blown fuses. Hope this helps

You most likely have an engine vacuum leak or a defective mass airflow sensor or low fuel pressure. Read the codes with a OBD2 code reader and see what the standard codes are.

Hello, I was driving my 2002 BMW 325i and at a stop light the back tail light come I check It and look like it had a short in the housing it just start to act weird, the lights on the dash came on emi, check engine, brake, the one in middle that's looks like a A with a circle round it.i disconnected the battery for about 10mins and they still come on, can anyone of you help. What to do

All I know is that it is a 9 year old BMW. Probably has a little over 100k miles on it, right?
I would give better than 50/50 odds that a check engine light is telling you that your oxygen sensors are approaching the end of their service and are getting slow to respond. If you read the codes (which many auto parts stores will do for free) and the code says 'Catalyst efficiency low', the problem is old oxygen sensors.
You can replace oxygen sensors yourself if you have ramps to raise the car up.

328 e46 eml light came on now wont start can anyone help please

Hi,

The code you reported does not seem to have relevance for BMW. Often generic OBDII codes do not have meaning and in this case the fault code does not correlate with any reference tables that I am using at this time. If you can have the car scanned with the BMW proprietary software and revert with those codes, it might shed light on this issue.

Let me know.so that we could proceed.

Hope i helped you.

Thanks for using ' Fixya ' and have a nice day!!

What you need to do is have a shop pull the CHECK ENGINE LIGHT CODES from tne cars computor. Once codes are known the diagnostics proceures must be perform to determine what of the engine circuits caused the light to come on. Once repairs are done then the CHECK ENGINE LIGHT can be reset.

could be new engine mounts or miss fire ...

The check engine light could be any number of things and the only way to find out is have the codes scanned. The brake light issue is common on E46 3 series. It is an issue were the brown ground wire that goes into the lamp housing melts at the connector causing a loose ground connection. The connector needs to be replaced and also add additional grounding wires to prevent further issues. And for fuel additives either use the cheveron techron, or the bmw fuel additive(the bmw stuff is the exact same thing, so just use which ever is cheaper).