I dont really know where to start on this on. I bought my 96 4.9 from a roofing company for a good price and have several codes to deal with. The truck runs ok but chews gas.
I pull codes on it and here is what I have, keeping in mind I dont know if all of these are actualy bad or not that why im looking to everyone for help to get an idea where to start.

Codes ====================================

1. P1351 IDM Circuit Input Fault.
2. P1359 Spark Output SPOUT Circuit Fault.
3. P0136 OS Sensor Curcuit Malfuntion (Bank1 Sensor 2)
4. P1131 Lack Of HO2S1 Switches - Lean ( Bank1 Sensor 1 )
5. P1151 Lack Of HO2S1 Switches - Lean ( Bank2 Sensor 2 )
6. P0301 Cylinder 1 Misfire Detected.
7. P0385 Crankshaft Position Sensor B Circuit Malfunction
8. P0171 System To Lean ( Bank 1 )
9. P0174 System To Lean ( Bank 2 )

 

I'd clear the codes and start fresh. Sometimes you don't know how long the codes have been stored. Keep the codes you have listed and see how many of them come back up. You may want to look to make sure that you don't have any vacuum leaks anywhere also. They can cause problems that make you think that something else is wrong. Recheck the codes as soon as your check engine light comes back on. Good luck!

 

Thanks for the reply
I cleared the codes and came up with the following code real quick
P1351 IDM Circuit Input Fault
When I rev it a little I get these 2 codes.
P0171 System To Lean ( Bank 1 )
P0174 System To Lean ( Bank 2 )
Thanks again
Kenny

 

Get your IDM fault corrected and the other two will probably go away too. Good luck.

 

Thanks for the reply, I have no idea what the IDM is. Can anyone give me a pointer on where to start.
Thanks again

 

I did a little research and the code P1351 is a manufactures specific code. Which means IDM input circuit malfunction/Ignition coil control circuit high voltage. You could have a wire connection problem or too high of a voltage supplied to the coil circuit from the sounds of it. I don't have a repair manual for that year of truck to look up the wiring diagram to help much more than that. Sorry but maybe someone else can give you more ideas or something else to check. Good luck!

 

Hi! I'm new around here and have a question regarding a airbag light code. It flashes 4 times and then 7 times, so I take it that it means a trouble code of 47. Any ideas, besides taking it to the dealership?

 

...Welcome to Ford Truck Enthusiasts!

See you on the boards. ….

 

Please make your own thread in the correct forum.

Your issue has nothing to do with the one the original poster asked about.

Also, identify your truck by year, engine, and drivetrain in your signature. There are many variations and it is difficult to guess what you're asking about.

Steve

 

Back the 96 4.9.

Based on that collection of codes, I'd suggest the following will be likely:

P1351 & P1359: Ignition control module (ICM), PCM , or interconnecting wiring either open-circuited or a short to another circuit. Check with your local auto parts store to see if they can do a bench test of the igntion control module. Pull it and have it tested. Be prepared to replace it if it fails. If it passes, you'll need to do more testing. If the PCM does not receive the Ignition Diagnostics Monitor (IDM) signal from the ICM, it removes the SPOUT signal which causes the timing to be set to a default angle, usually 10 degrees BTDC. This will cause the engine to run, but not up to its full potential.

O2 and lean codes: You likely have both a vacuum leak condition and old/lazy upstream O2 sensors. Unless you address both, you will drive yourself crazy. Check the PCV valve and its plumbing.

New plugs and wires. Use Motorcraft or AutoLite plugs and high quality wires such as Motorcrafts, AC-Delcos, or AutoLites. Do not use cheap, store brand, or gimmick products for this application.

Roofing companies may be good at installing roofs , but they're lousy at maintaining or repairing their vehicle fleet once it gets too old. It appears that your "new" truck has an accumulation of defects that may make up for that "good price" you got. If you apply some logic and address this in a systematic and logical manner, you can fix this yourself and still end up with a reasonably priced truck.

Steve