code 4 from p28 ecu only how to fix??

bigtroble

#1 01 Aug 2010, 18:25 ◈ 2024-11-11

well it only throws code 4 with this ecu
all others are fine
so I know the sensors are ok
tried tracing circuit for any visible problems but nothing
anyone has the fix for this ecu
has the 11F0-1500 board

Joseph Davis

#2 20 Aug 2010, 13:18 ◈ 2024-11-11

Re: code 4 from p28 ecu only how to fix??

H1C1 is faulty.

bigtroble

#3 02 Sep 2010, 11:20 ◈ 2024-11-11

Re: code 4 from p28 ecu only how to fix??

what else does that H1C1 control what about iacv code 14?
can I use one from a p72 ecu looks pretty close??

bigtroble

#4 07 Sep 2010, 13:22 ◈ 2024-11-11

Re: code 4 from p28 ecu only how to fix??

update.........
H1C1 fixed it
thanks again!!

any luck with code 14 on p75-p72 ecu fix??
or code 1 on p30-010 ecu fix?