Diagnosis help
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Freshman User
Joined: Aug 2006
Posts: 34
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Diagnosis help
Can someone help me understand what I am reading.I,for some reason don't understand the language.I have a 92 ranger,2 wheel dr.,2.3 eng. w/8 sparkplugs,5 spd trans. and approx. 200,000 miles.My check eng. light comeson and goes off quite regularly.I bought a code reader and book to self diagnos the problems.What I have found is the following:
118 - Engine coolant temp. sensor above max. voltage / 0 to -40degrees F
181 - HEGO(HO2S) sensor fault unable to switch/lean during part throttle
327 - EGR valve position circuit below minimum voltage
327 - EVP/EPT circuit below minimum voltage
328 - EGR closed valve voltage lower than expected
543 - Fuel pump secondary circuit fault
My book tells me how to check the ECT,so that should'nt be a problem to figure out.I do not understand the rest and my book doesn't help.I live in a county that requires yearly emission testing.The test results are as follows:
HYDROCARBONS (HC) in PPM - Loaded 37, Idle 22
CARBON MONOXIDE (CO) in % - Loaded 0.01, Idle 0.00
Any help would be appreciated,
Thank you
Ion Kendall
118 - Engine coolant temp. sensor above max. voltage / 0 to -40degrees F
181 - HEGO(HO2S) sensor fault unable to switch/lean during part throttle
327 - EGR valve position circuit below minimum voltage
327 - EVP/EPT circuit below minimum voltage
328 - EGR closed valve voltage lower than expected
543 - Fuel pump secondary circuit fault
My book tells me how to check the ECT,so that should'nt be a problem to figure out.I do not understand the rest and my book doesn't help.I live in a county that requires yearly emission testing.The test results are as follows:
HYDROCARBONS (HC) in PPM - Loaded 37, Idle 22
CARBON MONOXIDE (CO) in % - Loaded 0.01, Idle 0.00
Any help would be appreciated,
Thank you
Ion Kendall
Elder User
Joined: Sep 2006
Posts: 871
Likes: 0
Check all your grounds. A bad ground connection will screw with voltage readings all over the place and set multiple codes. I believe the Coolant Temp/EGR/O2 sensors all share the same ground, but don't quote me on that.
HOWEVER on the same note, these do have issues with the EGR position sensor getting goofy (this is the one that bolts onto the backside of the valve, right?)
As far as your fuel pump code, don't worry about it. I bet almost all fords out there have that set and it typically won't set your check engine light (and if the fuel pump circuit truly was bad it wouldn't even run).
HOWEVER on the same note, these do have issues with the EGR position sensor getting goofy (this is the one that bolts onto the backside of the valve, right?)
As far as your fuel pump code, don't worry about it. I bet almost all fords out there have that set and it typically won't set your check engine light (and if the fuel pump circuit truly was bad it wouldn't even run).
