P0603 "Generic Permanent"

40 to 332 · 05-19-2017, 06:46 PM

Service Engine Soon" light lit up this morning. DTC reads "P0603 Generic Permanent". Has something to do with the Powertrain Control Module (PCM) memory. I can't clear it using the OBDII reader, presumably since it's "permanent". Anyone experienced this? Battery had been disconnected for a few hours yesterday. Car drove fine today … no hesitation, smooth idle … but I'm stuck with the SES light being on. Looking for possible fix. Thanks!

SouthArk370Z · 05-19-2017, 08:36 PM

Possibly bad power to PCM. Remove one of the battery terminals (always a good idea when working on electrical stuff) and then check the wiring to the PCM. Check the FSM to see if a fuse may be involved. If you fixed it, PID should clear.

40 to 332 · 05-20-2017, 07:13 PM

Started it up today and the SES light was gone. A quirk from disconnecting the battery yesterday, I guess.

05-19-2017, 06:46 PM	#1 (permalink)
40 to 332 Enthusiast Member Join Date: Apr 2013 Location: Kimberley, BC, CANADA Posts: 452 Drives: 13 370Z BS M6 Sport Rep Power: 439	P0603 "Generic Permanent" Service Engine Soon" light lit up this morning. DTC reads "P0603 Generic Permanent". Has something to do with the Powertrain Control Module (PCM) memory. I can't clear it using the OBDII reader, presumably since it's "permanent". Anyone experienced this? Battery had been disconnected for a few hours yesterday. Car drove fine today … no hesitation, smooth idle … but I'm stuck with the SES light being on. Looking for possible fix. Thanks!

05-19-2017, 08:36 PM	#2 (permalink)
SouthArk370Z Premium Member Join Date: Nov 2010 Location: South Arkansas Posts: 8,435 Drives: 2014 Challenger Rep Power: 324198	Possibly bad power to PCM. Remove one of the battery terminals (always a good idea when working on electrical stuff) and then check the wiring to the PCM. Check the FSM to see if a fuse may be involved. If you fixed it, PID should clear. __________________ Steering Lock Links - Search The370Z Bookmarklet - FSM @ NICOclub Mankind has progressed past the need for war but we haven't evolved that far. - NachoMahma

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05-20-2017, 07:13 PM	#3 (permalink)
40 to 332 Enthusiast Member Join Date: Apr 2013 Location: Kimberley, BC, CANADA Posts: 452 Drives: 13 370Z BS M6 Sport Rep Power: 439	Started it up today and the SES light was gone. A quirk from disconnecting the battery yesterday, I guess.