P0689 engine code please help
02-10-2008, 05:30 PM
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P0689 engine code please help I got this code p0689 ECM/PCM (Power Relay Sense Circuit Low) My car starts on fine idles good for about 5 minutes then when it warms up then starts running like **** ,misfires and difficult to start what can it be BTW I have a 93 Mazda RX-7 with a 06 LS2 GTO engine
Last edited by cencalrx7; 02-27-2008 at 08:35 AM.
02-10-2008, 07:57 PM
#2
what pcm? what OS corvette? it can make a differnce.
on corvette it's ignition relay feedback back voltage low.
if the pcm sees less than 10v for more than 5 seconds it will spit the code.
on corvette it's ignition relay feedback back voltage low.
if the pcm sees less than 10v for more than 5 seconds it will spit the code.
02-27-2008, 08:37 AM
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BTW I checked for 12v on my PCM and it's good after I clear the code it does not come back but the main problem is that the car starts fine and after 5 minutes it starts misfiring anbody else can help me out
Last edited by cencalrx7; 02-27-2008 at 08:43 AM.
