Question about 1999 Volvo V70

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Engine management light comes on whilst driving

Stays on for a time then goes off

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I have a 1999 V70 10 valve. Last year the check engine light came on intermittently when driving. Performance etc was normal so I ignored it. After several weeks it stayed on permanently. The Volvo workshop read the fault code and diagnosed a faulty ignition coil which they replaced.
No further problems since then.

Posted on May 13, 2009

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Go to a parts store and run a free diagnostic test. It will tell you the codes that have popped up and then you can fix it from there. That light means the computer is sensing a problem.

Posted on Apr 16, 2009

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The Check Engine Light light comes on and blinks in a steady pattern while driving.
Don't confuse this steady pulsing of the Check Engine Light light (usually one or more flashes per second) with a flicker (see above). The Check Engine Light may stay on steadily or it may flash when the vehicle is accelerated. This is very serious. There is a severe failure of the emission control system that is causing the engine to misfire to the point that the catalytic converter is damaged each time the Check Engine Light flashes. It may mean that the catalytic converter is overheating to the point that it will glow red or, in extreme cases, start a fire on the underside of the vehicle. Immediately pull over to a safe place and have your vehicle towed to an automotive diagnostician for repair. Vehicles can be severely damaged and even destroyed by fire if this condition is ignored for too long.

I suggest scanned the PCM to know exactly what fault code is stored there.

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