First post: 1996 F250
Fleet Owner
Joined: Aug 2005
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From: Easton,Ks
No the OBD1 codes were depending on the year, engine size and the transmission. Some were 2 digits and others were three digit codes. But you can not have 2 & 3 digit codes on the same truck, it is either one or the other.
The 1994 F-series trucks were the last ones to have some of the trucks 2 digit. They were the ones with a 300 engine and standard transmission.
Just about all of the 1989 - 1997 trucks with the 460 & E4OD had 3 digit codes with the OBD1 EEC-IV system.
Your truck would have the E4OD in it.
The 1994 F-series trucks were the last ones to have some of the trucks 2 digit. They were the ones with a 300 engine and standard transmission.
Just about all of the 1989 - 1997 trucks with the 460 & E4OD had 3 digit codes with the OBD1 EEC-IV system.
Your truck would have the E4OD in it.
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No the OBD1 codes were depending on the year, engine size and the transmission. Some were 2 digits and others were three digit codes. But you can not have 2 & 3 digit codes on the same truck, it is either one or the other.
The 1994 F-series trucks were the last ones to have some of the trucks 2 digit. They were the ones with a 300 engine and standard transmission.
Just about all of the 1989 - 1997 trucks with the 460 & E4OD had 3 digit codes with the OBD1 EEC-IV system.
Your truck would have the E4OD in it.
The 1994 F-series trucks were the last ones to have some of the trucks 2 digit. They were the ones with a 300 engine and standard transmission.
Just about all of the 1989 - 1997 trucks with the 460 & E4OD had 3 digit codes with the OBD1 EEC-IV system.
Your truck would have the E4OD in it.
here's engine code check, take two:
111 111 (pause) 1 (pause) 172 332 542 172 332 542
As far as I have been able to determine, the first two 111 codes are the KOEO codes, and said system checks okay.
Then, looks like it has 3 memory codes:
332 is EGR valve.
542 is fuel pump, and I'm guessing it has something to do with the fact that there is not rear fuel pump (rear tank was taken out).
172 says this: "Oxygen sensor not switching – system is or was lean – Single, Right or Rear HO2S – Fuel control" - I guess It's running lean?
BTW, to answer your earlier questions, I'm on JeepForum.com. I own a 1992 Yj wrangler 4.0L I-6. And no I didn't buy the code reader because I live pretty far from civilization. I thought I was smart enough to run the test without it. I was wrong, lol.
Fleet Owner
Joined: Aug 2005
Posts: 23,667
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From: Easton,Ks
The 542 code happens if someone runs the fuel pump test by grounding pin #6 of the self-test plug.
A Continuous Memory DTC 542 indicates that one of the following intermittent conditions has occurred:
-- Fuel pump circuit activated when PCM expected circuit to be off (i.e., fuel system test or prime procedure).
-- Inertia fuel shutoff switch tripped, then reset.
-- Open circuit in or between the fuel pump and FPM circuit at the PCM .
-- Poor fuel pump ground.
-- FPM or power-to-pump circuit short to power.
-- Fuel pump relay contacts stuck closed.
-- Left/Front HO2S circuit short to power (with/dual HO2S).
-- Engine stall due to excessive load.
Low fuel pressure can cause the 172 code.
Broken vacuum lines is a common cause of the 332 code.
Continuous Memory DTC 332 indicates the EGR valve did not open with the engine stabilized and the EVR solenoid duty cycle present sometime during vehicle operation.
Possible causes:
-- Obstructed or cracked hose to EGR valve.
-- Icing.
-- Damaged EGR valve.
-- Damaged EVR solenoid harness.
A Continuous Memory DTC 542 indicates that one of the following intermittent conditions has occurred:
-- Fuel pump circuit activated when PCM expected circuit to be off (i.e., fuel system test or prime procedure).
-- Inertia fuel shutoff switch tripped, then reset.
-- Open circuit in or between the fuel pump and FPM circuit at the PCM .
-- Poor fuel pump ground.
-- FPM or power-to-pump circuit short to power.
-- Fuel pump relay contacts stuck closed.
-- Left/Front HO2S circuit short to power (with/dual HO2S).
-- Engine stall due to excessive load.
Low fuel pressure can cause the 172 code.
Broken vacuum lines is a common cause of the 332 code.
Continuous Memory DTC 332 indicates the EGR valve did not open with the engine stabilized and the EVR solenoid duty cycle present sometime during vehicle operation.
Possible causes:
-- Obstructed or cracked hose to EGR valve.
-- Icing.
-- Damaged EGR valve.
-- Damaged EVR solenoid harness.
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The 542 code happens if someone runs the fuel pump test by grounding pin #6 of the self-test plug.
A Continuous Memory DTC 542 indicates that one of the following intermittent conditions has occurred:
-- Fuel pump circuit activated when PCM expected circuit to be off (i.e., fuel system test or prime procedure).
-- Inertia fuel shutoff switch tripped, then reset.
-- Open circuit in or between the fuel pump and FPM circuit at the PCM .
-- Poor fuel pump ground.
-- FPM or power-to-pump circuit short to power.
-- Fuel pump relay contacts stuck closed.
-- Left/Front HO2S circuit short to power (with/dual HO2S).
-- Engine stall due to excessive load.
Low fuel pressure can cause the 172 code.
Broken vacuum lines is a common cause of the 332 code.
Continuous Memory DTC 332 indicates the EGR valve did not open with the engine stabilized and the EVR solenoid duty cycle present sometime during vehicle operation.
Possible causes:
-- Obstructed or cracked hose to EGR valve.
-- Icing.
-- Damaged EGR valve.
-- Damaged EVR solenoid harness.
A Continuous Memory DTC 542 indicates that one of the following intermittent conditions has occurred:
-- Fuel pump circuit activated when PCM expected circuit to be off (i.e., fuel system test or prime procedure).
-- Inertia fuel shutoff switch tripped, then reset.
-- Open circuit in or between the fuel pump and FPM circuit at the PCM .
-- Poor fuel pump ground.
-- FPM or power-to-pump circuit short to power.
-- Fuel pump relay contacts stuck closed.
-- Left/Front HO2S circuit short to power (with/dual HO2S).
-- Engine stall due to excessive load.
Low fuel pressure can cause the 172 code.
Broken vacuum lines is a common cause of the 332 code.
Continuous Memory DTC 332 indicates the EGR valve did not open with the engine stabilized and the EVR solenoid duty cycle present sometime during vehicle operation.
Possible causes:
-- Obstructed or cracked hose to EGR valve.
-- Icing.
-- Damaged EGR valve.
-- Damaged EVR solenoid harness.
Ok, found a vacuum leak. The lines were tucked away, but all three lines to the vacuum reservoir are broken off. Very brittle old lines, too. The white line to the EGR is broken, so is the black line to the Air Bybass/Air Diverter (these are according to the under-hood vacuum diagram).
Fleet Owner
Joined: Aug 2005
Posts: 23,667
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From: Easton,Ks
When you are done fixing the lines you need to clear the codes out of CM.
To do this start out like you were going to read the codes (engine off) and when the CEL on the dash starts to flash codes (111, 111) remove the ground from the STI wire that you grounded to start the code read out. Then turn off the key and the CM codes should be gone.
To do this start out like you were going to read the codes (engine off) and when the CEL on the dash starts to flash codes (111, 111) remove the ground from the STI wire that you grounded to start the code read out. Then turn off the key and the CM codes should be gone.
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New User
Joined: Feb 2014
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When you are done fixing the lines you need to clear the codes out of CM.
To do this start out like you were going to read the codes (engine off) and when the CEL on the dash starts to flash codes (111, 111) remove the ground from the STI wire that you grounded to start the code read out. Then turn off the key and the CM codes should be gone.
To do this start out like you were going to read the codes (engine off) and when the CEL on the dash starts to flash codes (111, 111) remove the ground from the STI wire that you grounded to start the code read out. Then turn off the key and the CM codes should be gone.
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