Question about GPS
The light indicates that a high engine or evaporative emissions had been detected by the O2 sensors. If the light is blinking instead of steady, that means that the fault detected may cause damage to the engine.
The emission system is the exhaust plus O2 sensors, located on the exhaust pipe, before and after the catalitic converter. This is probably the symptom of the problem, rather than the cause. If problem was simply the emission system, engine would crank, and you would get voltage from both coil packs.
If one of the coil packs has no voltage, that is the problem. Either the coil is faulty, or there is a problem in connection from coil to PCM and ignition. Depending on the car model, if coil packs are identic, they can be tested by swapping them. A better test is reading voltage in to coil pack.
If you have an OBDII scanner you can also read stored engine codes, they often reaveal more on the problem.
Posted on Aug 27, 2010
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Posted on Jan 02, 2017
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