I had a diagnostic run on the engine and I got 5 error codes from the test: 31,14,12,41,31. The report shows that I need to change the EGR valve, P.I.P (code14?), KOER, EGO, and not sure what the scribble on the paper says....

How much am I looking at to replace the parts to get rid of these error codes?

'87 F150,
Black w/Red Stripe paint,
6" Lift,
33"x15.50",
I6 300 4.9L,
3.55 true-loc rearend,
Destroyed HUBS (flange type)

 

 

First of all, you need a digital volt ohm meter. With your key on, engine off, pull the plug from your EGR valve and read the voltage on them two leads. This is your EVP voltage. You should have between 4.0 and 6.0 volts. If you do have that, the power circuits to the sensors are ok. The next test has to be done at the ECM with the key on and the engine off. The voltage between the EVP sensor terminal and the Sig Ret (signal return) terminals should be .67 volts or less. My guess is that you need to replace the sensor (EVP) on your EGR valve. As far as cost I would esitmate no more than $25.00. Good luck!

 

Looks like I know what I'm doing when I get home! LOL, sounds like you are da man! thank you soooooo much for the help. I'll post my results tomorrow when I get back to work.

Anyone else out there have these codes show up? Anyone fix the problems without having to shell out tons of cash?

'87 F150,
Black w/Red Stripe paint,
6" Lift,
33"x15.50",
I6 300 4.9L,
3.55 true-loc rearend,
Destroyed HUBS (flange type)

 

I've gotten an EGR code from a leaking vacuum reservoir. Don't assume that just because you see the name of a part in the code's definition that the part needs to be replaced. Read the full definition and analyze the circuit that the computer uses to monitor that part, and what controls that part.

For the full list, go here:
http://www.broncodata.com/tech/codes.htm