harness problem????
Thread Starter
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Junior User
Joined: Oct 2004
Posts: 52
Likes: 0
From: central ohio
harness problem????
95 PSD 256k miles, stock, automatic
check engine light on.....truck runs decent....shifting hard....have to feather accelerator for reasonably seamlesss shifts
codes as follows:
1. P1298 IDM FAILURE
2. P0476, P0478, EXHAUST BACKPRESSURE CODES
3. P1280 IPC LOW INPUT
4. P0221AP/IVS DISAGREE
ford store of course wants me to buy new IDM ($900.00)...found one on ebay for a couple hundred enroute.. remember reading in this forum that if IDM is bad, truck more likely than not would not run.. also recall reading that bad harness could be result of all codes.
QUESTION? 1. does local ford store have technique to check harness for bad pins, burned wires etc? 2. would it make sense to go ahead and install new harness before replacing modules since truck seems to running ok??
3. is the rough shifting a possible symtom of any or all of the above codes
thanks for all advice
check engine light on.....truck runs decent....shifting hard....have to feather accelerator for reasonably seamlesss shifts
codes as follows:
1. P1298 IDM FAILURE
2. P0476, P0478, EXHAUST BACKPRESSURE CODES
3. P1280 IPC LOW INPUT
4. P0221AP/IVS DISAGREE
ford store of course wants me to buy new IDM ($900.00)...found one on ebay for a couple hundred enroute.. remember reading in this forum that if IDM is bad, truck more likely than not would not run.. also recall reading that bad harness could be result of all codes.
QUESTION? 1. does local ford store have technique to check harness for bad pins, burned wires etc? 2. would it make sense to go ahead and install new harness before replacing modules since truck seems to running ok??
3. is the rough shifting a possible symtom of any or all of the above codes
thanks for all advice
FTE Leadership Emeritus
Joined: May 2001
Posts: 13,653
Likes: 6
From: Cabot, Arkansas
I don't understand how the truck can be running at all if the IDM has failed? Normally when the harness burns it will run very rough, and if the IDM fails completely it can not run at all.
It might be the throttle position switch causing the shifting issue, and the injection pressure regulator valve is most likely on the ICP code.
What happens when you clear the codes and drive it? Do they come right back?
It might be the throttle position switch causing the shifting issue, and the injection pressure regulator valve is most likely on the ICP code.
What happens when you clear the codes and drive it? Do they come right back?
Thread Starter
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Junior User
Joined: Oct 2004
Posts: 52
Likes: 0
From: central ohio
When the check engine light first came on the engine would stall at idle and lose power momemtarily at higher rpms. these symptoms only lasted maybe 30 miles and stopped as quickly as they appeared. however , my check engine light continues to stay on. i don't know how to clear the codes. please advise.
Thread Starter
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Junior User
Joined: Oct 2004
Posts: 52
Likes: 0
From: central ohio
yea.... i had dc'd the battery to reset it b4. dumb me with my first diesel forgot about the second battery over there on the drivers side . that makes all the difference in the world. i'm learning. thanks fellas.
