idole trouble!!
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Junior User
Joined: Jun 2005
Posts: 54
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From: AZ
idole trouble!!
i have a bad idole on my 95 F150 5.8w. so i got the codes and they were "538- insufficient RPM change during KOER dynamic response test. or operator error and 173- HEGO shows system always rich." now can someone make someone help me understand what is wrong? because i still don't know what to fix!
thanks sam,
thanks sam,
Posting Guru
Joined: May 2003
Posts: 1,666
Likes: 4
From: Sunny tourist infested FL
hi...
538 is an error code "system failed to reconize brief WOT
NOTE:A brief snap of the throttle may not be sufficient to pass this test. Be sure to go to WOT and return.
Rerun Engine Running Self-Test. Be sure operator is familiar with the Engine Running format which proceeds as follows:
-- Activate Engine Running Self-Test.
-- Start engine.
-- ID Code start of test.
-- Dynamic Response code 1 (0); perform brief WOT.
-- Testing over.
-- DTC output begins.
* Is DTC 77 or 538 still present?
Yes
GO to «M2».
No
Dynamic Response Test passed.
SERVICE any other DTC(s) received as necessary.
---------------------------------------------------
173 i believe is an O2 sensor code. it's reading the gases are rich.
Here's the stuff to look at for this code. This info is from the manual
Possible Causes:
-- Fuel injectors.
-- HO2S.
-- Secondary Air Injection (AIR) system.
-- PCV/Hose.
-- Vacuum.
-- CANP.
-- MAP sensor.
-- Electronic Ignition Coil Failure.
* Key off.
* Remove the PCV valve from the valve cover. Inspect both rocker cover hole and PCV for damage, sludge build up, blockage and movement of valve plunger. Service as necessary.
* Run KOEO
Address any continuous ignition DTC's before servicing KOER DTCs.
* Start engine and let idle for two minutes minimum.
*NOTE:For a No Start GO directly to «H2».
* Run KOER «Quick Test».
* Are any of the above DTC's present in KOER Quick Test?
Yes
REINSTALL PCV valve.
GO to «H2».
No
For Continuous Memory DTC's 41/144, 91/139, 176 GO to «H2».
All Others:
CHANGE engine oil and filter.
REINSTALL PCV valve.
DRIVE vehicle 5 miles/55mph.
RERUN «Quick Test»
538 is an error code "system failed to reconize brief WOT
NOTE:A brief snap of the throttle may not be sufficient to pass this test. Be sure to go to WOT and return.
Rerun Engine Running Self-Test. Be sure operator is familiar with the Engine Running format which proceeds as follows:
-- Activate Engine Running Self-Test.
-- Start engine.
-- ID Code start of test.
-- Dynamic Response code 1 (0); perform brief WOT.
-- Testing over.
-- DTC output begins.
* Is DTC 77 or 538 still present?
Yes
GO to «M2».
No
Dynamic Response Test passed.
SERVICE any other DTC(s) received as necessary.
---------------------------------------------------
173 i believe is an O2 sensor code. it's reading the gases are rich.
Here's the stuff to look at for this code. This info is from the manual
Possible Causes:
-- Fuel injectors.
-- HO2S.
-- Secondary Air Injection (AIR) system.
-- PCV/Hose.
-- Vacuum.
-- CANP.
-- MAP sensor.
-- Electronic Ignition Coil Failure.
* Key off.
* Remove the PCV valve from the valve cover. Inspect both rocker cover hole and PCV for damage, sludge build up, blockage and movement of valve plunger. Service as necessary.
* Run KOEO
Address any continuous ignition DTC's before servicing KOER DTCs.
* Start engine and let idle for two minutes minimum.
*NOTE:For a No Start GO directly to «H2».
* Run KOER «Quick Test».
* Are any of the above DTC's present in KOER Quick Test?
Yes
REINSTALL PCV valve.
GO to «H2».
No
For Continuous Memory DTC's 41/144, 91/139, 176 GO to «H2».
All Others:
CHANGE engine oil and filter.
REINSTALL PCV valve.
DRIVE vehicle 5 miles/55mph.
RERUN «Quick Test»
Last edited by wildcard30; Mar 11, 2006 at 06:02 PM.
Posting Guru
Joined: May 2003
Posts: 1,666
Likes: 4
From: Sunny tourist infested FL
pfogle,
I believe the computer ignores the O2 sensor until the motor is hot.
5.8L95f150,
Sorry if the procedures look wierd. I copied them from a CD manual. If can see if I can post the additional TS ladders.
Or pm me and I can send you the pages in pdf format.
I believe the computer ignores the O2 sensor until the motor is hot.
5.8L95f150,
Sorry if the procedures look wierd. I copied them from a CD manual. If can see if I can post the additional TS ladders.
Or pm me and I can send you the pages in pdf format.
