Check engine light running lean valves dirty.
SOURCE: check engine light comes on but car runs great 2002 bmw 325i and
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).
SOURCE: Check Engine light on 1998 BMW Z3 roadster
yes the light is because of the gas cap being gone (sets code in evaporative emissions system), replace the gas cap, disconnect the battery for five minutes and that will turn of/reset the light, make sure u have the radio code before u do this, if u don't u will have no radio after the battery is disconnected..
SOURCE: HOW COULD I READ CHECK ENGINE CODE ON A 1986 BMW 325E???
You can't use a tool to pull codes from an '87 BMW 325(e). You have the 2.7 liter and your DME, or computer is a Motronic. If you had a 325i, then a tool could read the codes because the computer was upgraded that year to a Motronic 1.1 system with a round plug in under the screw cap on the driver's side under the hood. The only tool you can buy is the one for resetting the service interval light and resetting the oil change light. To answer your question about going about finding your driveability problem would be to get a BMW Bentley Manual. This manual shows you how to use a standard voltmeter to check everything from your computer plug in. Your computer is located above the glovebox.
Good Luck,
~Stillin~
SOURCE: I would like to reset the check engine light on my
Hi as the car is BMW the only way you can reset it yourself is to buy an electronic tool that will plug into your cars engine management system, that will allow you to reset this light!!
You can buy this tool from 80-100 Pounds.
Other cars such as ford and peugeot etc can reset there light by using buttons on the dash board, but BMW, Mercs and Lexus don't have this function.
Your local garage will also be able to turn the light off, but will charge a small FEE!! So you will need to decide weather it is financially worth buying the tool to do it yourself or just pay the garage.
If you are planning on keeping the car for several more years if would be worth buying one as it will also provide you with the error codes, should your car have a problem and you will also be able to use it on other cars in the future if you do part with your BMW.
They are worth having if you work on cars yourself, as it will provide you with all error codes.
Let me know how you get on!! And if you need any further assistance. Thanx Paul
SOURCE: dtc light permanantly on
Well evreything electric can fail at antime.So its hard to say how long anything electrical will last.that being said I'd at least try to take it to someone for a second opinion.Most dealerships have such high labor costs.
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