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PGM-FI light comes on, led on PCM flashes 12 times
Car: Honda, Prelude Si, 1986, 2.0 - Back to Fix-It - Honda Prelude Si Repair Manuals
Q.PGM-FI light comes on, led on PCM flashes 12 times, pauses then repeats. All quick flashes no long, one pause. any ideas?
I already checked/done: replaced EGR valve. checked vacuum lines, new plugs,wires,cap and rotor.
Answer OK.. we need to test the EGR control system.. Here are the possible causes of this code:
.. and here is how to check that sytem:
Addition is it common for the ECUs to flash codes with all short lights instead of a long/short combo for double-digit codes? Manual I have gives no indication that the ECU would ever flash 12 shorts instead of 1 long and 2 short. Also, if there is no problem with the electrical side of the egr system, is there another problem that could cause the code? Ie: vacuum lines/devices in the box on the firewall or elsewhere.
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