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The service and repair manual with diagram will provide step by step help to locate and fix the problem on your own easily and you will get the manual from the given link Home Toolsnyouhttps://toolsnyou.com
May need a new oil pressure switch,it's located next to oil filter,remove electrical connector then part.You may have to remove oil filter to remove part.
Please refer to the owners manual for red light warning, it can be low oil pressure or hot engine or emissions system. If you don't have an owqners manual you can find used ones on eBay Motors.
The below is taken from another site written a year ago:
What you are looking at is the Service Indicator. The green, yellow and red lights let you know when service needs to be performed. The green lights mean everything is still good. The yellow lights mean "anytime you're ready." The red lights mean do the service ASAP. There are also two other lighted areas. One says "inspection," the other says "oil change" (or oil service.) An oil change is an oil change. However, there are two inspections: Inspection 1 is normally at every other 15,000 miles; Inspections 2 is at every 30,000 miles. Your local BMW dealer should have a pamphlet listing all duties performed for each of the services. Inspection 2 can run you around $400-$800 depending on the service station/dealership's labor rates. Inspections 1 should be around 1/2 of that. You should have your oil changed about every 5000 miles. Dealership oil changes can range from $35-$65. A BMW that is well taken care of will last a long time.
FYI, don't be surprised if the SI (service indicator) board decides to **** out one day. I'm surprised to see yours is still working (they usually die within 10 years unless someone went thru the expense to have it replaced.) If/when it does go, just gauge your services by the mileage intervals I've listed above. I'd also recommend when you stop into (or just call) the dealership, go to the parts department and order an owner's manual for your BMW. Should be less than $20 and get to you in about a week unless they have one in stock. When the service tech has performed the necessary service(s), he will reset your SI board so that only green lights are showing.
This solution may be too late but will help others with same problem. The E30 series have 2 rechargeable batteries on the (Service Indicator) SI board WHEN FITTED. located within the dash unit ( tacho/speedo/temp/fuel Unit) they have a life span of 6 years however mine lasted 17years not bad for a rechargeable batt anyway back to the point the effects of a buggered batts are
Inconsistent taco and temp guages
background radio noise (old model radios)
and THE INABILITY TO TURN SERVICE LIGHTS OFF !
The batts can be found in CONRAD (germany) MAPLIN (uk) the cos of the batts are approx £3 the new board costs direct from BMW with trade discount approx £200 in 2007 have fun (soldering required to replace batts) :-]
what the light looks like? if it looks like a little engine then thas the check engine light than tells you when a sensor is not working good and needs to be check with scan tool in an auto repair
but nothing to be worry car will be driveable but won't pass smog test until fix, if light does not loook like a little engine or motor then let me know how doe it look like
thank you very much you have been a great help much appreciated
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