In this guide, we look at common troubles that turn on BMW Check Engine Light (CEL), likewise known as Service Engine Soon (SES).

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If your BMW check engine light (or service engine soon light) remains on, it suggests that the Onboard Diagnostic System (likewise recognized as Digital Motor Electronics DME) has actually detected a trouble via the emission device, engine, or transmission.

 BMW examine engine light might come on due to somepoint as easy as a loosened gas cap, yet it have the right to additionally indicate an expensive engine or transmission difficulty.


Don"t panic!

It doesn"t expect your BMW needs to be towed unmuch less the car is overheating or if the check engine light is flashing. Continuing to drive if your BMW examine engine light continues to flash have the right to bring about more major and also costly troubles down the road.


If the inspect engine light or service engine quickly continues to be on, your BMW might drive fine if the cause is due to EVAP related fault code.

Unmuch less the difficulty is more serious in which situation you might alert performance problems such as:

BMW engine misfireBMW won"t accelerateStuck in limp modeEngine shakes at idle.BMW engine overheatsPoor accelerationErratic idleHard to start

BMW Service Engine Soon light may be on without any type of noticeable performance problems.

What does the BMW inspect engine or company engine shortly light mean? 

Your BMW"s check-engine light serves as a warning device to the driver that somepoint isn"t fairly ideal through its functionality – the problem deserve to be incredibly easy or serious. If significant, inspect engine light will certainly flash, and also transmission will certainly obtain stuck in limp mode. 

These issues can variety in severity, from a loose gas cap to a severe engine malattribute choose timing chain failure. 

Usual Causes

There are thousands of troubles that may create the check engine or business engine shortly in a BMW. BMW particular problems include:

VANOSCracked or loose hosesOld batteryBad mass airflow sensor,Low fuel level,Bad charcoal carbon canister,Wire harness,High-Prescertain Fuel Pump (HPFP) faientice,Crankshaft sensor badInjectors (when applicable).

Do not begin replacing BMW components without reading the fault codes.

If you do not have a BMW sdeserve to tool, have actually a shop specializing in BMWs review the codes and troubleshoot the trouble for you. Your regional auto components store may check out your BMW examine engine light free of charge. 

Once you have a diagnosis performed, you can decide if the repair is something you deserve to tackle yourself or let a BMW shop complete the job-related.

What to execute when the BMW check engine light turns on?

The initially step is to examine the fuel cap. If the cap is loose, it will certainly create the CEL. Tighten it till you hear it click.


Most 2005 and more recent BMWs will likewise show a separate symbol to remind you if you forgain to tighten the fuel cap. If the gas cap was loose and also you tighten it. The CEL light will certainly reset itself in a few driving cycles, commonly within a day or two.

If the BMW drives fine, closely monitor the engine temperature. If your BMW is overheating or the oil light is on, soptimal driving your BMW automatically. Get the BMW towed if crucial.

To discover out why your BMW examine engine light is on, you have to read fault codes. This is a simple procedure you can perdevelop yourself. 

How to diagnose BMW examine engine light

These instructions present you just how to read and also clear codes regarded examine engine lights on a BMW. It is wanted to diagnose BMW check engine light through an OBD-II scanner that can check out BMW-specific fault codes such as Foxwell NT510 for BMW. 




Locate the diagnostic port on your BMW. The port is under the dash on the driver"s side. Plug scanner into the OBD2 port. Turn on the ignition by pressing the begin button without pushing on the brake pedal.Allow the scanner to turn on.Press read/enter to check out codes from DME Module.Please create down the codes and clear them when you are completed.

This procedure only enables you to read and also clear codes from the ECU / DME / DDE. 

If you have other troubles, a generic OBD2 scanner will certainly not review and also clear the codes. In various other words, a generic OBD2 scanner can just review and clear codes from the ECU but not from various other modules, including ABS, SRS, Airbag, DSC, Stcapacity Control, EGS Transmission, etc.

Keep in mind that you deserve to check out the codes, yet you can"t clear them unmuch less you settle the problem that motivated the code. If you don"t solve the underlying trouble, the light and also the code will return. It retransforms right away; in other cases, it have the right to take a day or 2.

BMW Check Engine Light Symbol

There is a distinction in between BMW Check Engine Light vs. Service Engine Soon.



Check Engine Light - Yellow CELEngine Block Symbol in DashboardThe difficulty is often minor such as a loosened gas cap.Often BMW drives fine.


Service Engine Soon - SES LightSES light does not constantly mean there is a major engine problem.BMW might run and drive fine.
Check Engine Light - Half YellowThis problem is even more serious.The automobile normally goes into limp mode to proccasion even more damages.Serious engine or transmission problemBMW may be stuck in equipment, Limp Home Mode

BMW Check Engine Light Flashing On and Off

If the check engine light is flashing, it mostly implies that the DME module has actually detected a misfire. If the light is flashing, you will certainly notification negative acceleration, BMW engine shaking.

This trouble is regularly resulted in by poor spark plugs or a negative ignition coil, a widespread problem through many type of BMWs, consisting of 1, 3, 5, 6, X1, X3, and X5 series.

Other possibilities incorporate a vacuum leak, poor mass aircirculation sensor, clogged catalytic converter, and also a blown head gasket. It is not recommfinished to drive a BMW if the service engine light is flashing.

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When BMW"s service engine quickly light is flashing, and the auto is shaking, you have actually a difficulty that demands to be addressed as soon as feasible.

Under these conditions, your BMW will certainly be incredibly slow, and also the motor will shake at idle.