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Engine light went on. Mechnic removed the light and wrote ECM 250A on card. Light went on next day. What does this code mean?

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  • Cars & Trucks Master
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Fault code P250A means "Engine Oil Level Sensor Circuit". So apparently your car (make, model, year?) has a sensor for the oil level, and the circuit sending that information to the ECM has some problems. Broken wire? Bad connector? Bad sensor?

Posted on Dec 14, 2016

  • Joyce Muir
    Joyce Muir Dec 16, 2016

    Car has been fixed. The oil trap and PVC hose had to be replaced. Just bought this 2005 Volvo 5 weeks ago. I'm very aphrehensive. Thinking I'd better sell before it costs more money.

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Engine light went on. Took car to mechanic who removed the light. Wrote on card ECM 250A, light came on next day. What does this code mean?


This error code is a result of the engine fuel management system air fuel ratio has adjusted the fuel air trim to the high limit. This is most likely an O2 sensor or less likely a lambda sensor or possible a fuel supply problem.

Each of these components an be checked by a qualified service center. The system has expensive components so I suggest assuring the diagnostics before starting to swap in parts. After market parts are available, however my experience has concluded factory parts from the dealer is the most reliable repair.

Caution is suggested. Even though the car may have no drive ablity problems, a condition can occur that will damage the caltalitic convertor if the fuel air mix is to rich causing the cat to overheat!!

Hope this helps?


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Dec 14, 2016 | Cars & Trucks

1 Answer

Check engine light blinking


When the Check Engine light comes on steady, it means that the on-board computer (ECM) has detected a malfunction and stored a code. It also, if necessary, has taken measures to optimize operation of the vehicle, working around the anomaly. When the Check Engine light is blinking, it indicates that the ECM has gone into "open loop" or "limp" mode. This is when some critical issue is preventing the ECM from properly controlling the vehicle and it has fallen back on a preset standard configuration. There will also be failure codes normally associated with this. The vehicle, depending upon the cause of the problem, can operate in a way that seems normal to almost non-operational, depending on the component that has failed and the operational demand placed on the vehicle at the time. You need to have the ECM codes scanned and take repair actions ASAP.

Nov 18, 2015 | 2004 Chevrolet Impala

1 Answer

Car dosnt start


What was the code the mechanic cleared?

Mar 31, 2014 | 2002 Honda Civic

1 Answer

What causes the following faults code on 2004 volvo S40 :ECM-250A LONG TERM-FUEL TRIM:UPPER LIMIT,BCM-0100 COMMUNICATION PROBLEM WITH ECM,EPS-0082 ENGINE STATUS FAULTY SIGNAL,CCM-001 COMMUNICATION CONTROL...


Check, test or replace MAF sensor.

Hope this helps; also keep in mind that your feedback is important and I`ll appreciate your time and consideration if you leave some testimonial comment about this answer.

Thank you for using FixYa, have a nice day.

Jul 09, 2012 | 2004 Volvo S40

1 Answer

What does fault code ECM - 250A long term - fuel trim:upper limit on 2004 volvo S40 mean


Sound like a problem with the MAF sensor, try replace.

Pulled codes for ECM-250A long term fuel trim upper limit, inspected and found air mass sensor failing internally, should show 4 f/s at idle and is showing 2.98 f/s at idle. Recommend replacing with new.



Hope this helps; also keep in mind that your feedback is important and I`ll appreciate your time and consideration if you leave some testimonial comment about this answer.

Thank you for using FixYa, have a nice day.

Jul 09, 2012 | 2004 Volvo S40

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Check Engine light. Misfire Cylinder 4. Keeps coming back


it sounds like an intake vacuum leak to me. check with propane or acetylene

Nov 07, 2009 | 2001 Dodge Caravan

1 Answer

My service light came on saying a 13


13 is really dangerous. you shouldnt drive the car. call a mechnic should come out to look at it. 13 means that the engine is in the last stages of its life. be careful, it may blow up in ur next ignition start

Jul 03, 2009 | 2004 Acura TL

1 Answer

I change the egr valve and the hoses from the egr and then i reset the it the light came off then I drove it for a couple of days and the light came back on what next.


"Check Engine" light comes on, there is always a DTC (Diagnostic Trouble Code) stored in the ECM (Engine Control Module). You'll need an OBDII (On-Board-Diagnostics) scanner to retrieve any codes recorded/set in ECM. Once you do this and let us know what, if any codes are set, then we can go from there.

Jun 28, 2009 | 2000 Ford Expedition

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