Question about 2003 Ford Expedition

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Service check engine light blinking on and off

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I suggtes scanned the PCM to know excalty what fault code in there. Tell us this code number to send other details.

Posted on Aug 26, 2010

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Posted on Jan 02, 2017

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1998 HONDA CIVIC PROBLEM WITH ACCELERATION WHILE DRIVING, WHY IS THIS HAPPENING CHECK ENGINE LIGHT IS BLINKING THEN STAYS ON ALSO


Hi Candice:
If the check engine light is blinking, there is a problem that could cause serious engine damage.
You should take it to a qualified service mechanic.

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Check engine light flashing means there is a bad misfire , it flashes to tell you your damaging your catalytic converter . You need to have it check , you don't won't to have to replace the catalytic converter . Can cost up to $1,000.00 . Flashing Check Engine Light CarMD

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Service engine light blinking


As we all have done since 1981 --some 32 years now

CHECK FOR CODES--first & every time you get a check light

Blinking verse steady is not always good

Got with the solution fast

Dec 01, 2012 | 2004 Chevrolet TrailBlazer

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The service engine light came on and started to have problems gaining speed and the light started blinking!


This is most likely a misfire. When the light blinks under acceleration it is telling you the engine is in serious need of service, which doesn't necessary mean that the engine is in serious trouble. Have your OBDII port and codes checked. Your local parts store like AUTOZONE will do this for free.

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Service engine soon light blinking /car backfiring and missing


If your check engine light is blinking, you can take your car to Autozone, Advanced Auto or other parts house and ask them to get the engine codes. This ios a FREE service. It sounds like your camshaft positioning sensor, Cam Positioning sensor is bad. This is how comuterized systems tell where the cam and crackshaft are to set the timing. It sounds like you have timing issues.

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I have a Mazda 2001 MPV, just had service for o2 sensor and now the check engine light is blinking .


blinking light means engine is misfiring. continuing to drive will severely damage the engine. The O2 should not be related to your engine misfiring

Nov 13, 2009 | 2001 Mazda MPV

1 Answer

Check engine light even after servicing to correct


you have a misfire, the eng light flashes,avoid driving it , or it can damage the cat converter,i dont know what repair was done, but if you replaced the spark plugs one may be damaged, or incorrect plug gap can cause this concern.

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Hold light blinking, check engine light on, engine slows down


check tps sensor (throttle position sensor in backside of the throttle cable) and map sensor (manifold absolute pressure on front little 1 inch sensor with vacuum line) make sure there plugged in. the ecm (engine control module driver side inner fender) and tcm (transmission control module under dash) both need the data to know when to upshift and increase fuel/air. Otherwise the computer runs default values and guesses off of other sensors giving poor performance. also disconnect battery for 15 min. usually resets aveo service lights if you dont have a scanner.

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1 Answer

Service engine light blinks,code read out of po300


Code p0300 is the code for "random missfire detected". The "check engine" light is flashing to warn you that severe damage is being done to the catalytic converter.(very expensive)..

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