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Jeremy
Jeremy, Certified Diesel Technician/Electrician
Category: Ford
Satisfied Customers: 2994
Experience:  ASE, NATEF Engines and Electrical certified, EPA 608/609
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Diagnostic codes ford F150 Lariet KOEO 33 41 95/33 41 95

Customer Question

diagnostic codes for 1988
ford F150 Lariet KOEO 33 41 95/33 41 95 Koer 42 33 77. What do these codes mean?
Submitted: 11 months ago.
Category: Ford
Expert:  Jeremy replied 11 months ago.

My name is ***** ***** I will assist you with your question today.

I'm an independent contractor and I don't get paid until a rating has been made. No rate, site gets it all.

We can go back and forth as needed to help resolve the issue you are having. Follow ups are free after ratings, so rate in confidence!

See your code meaning below as requested.

O is KOEO

M is Memory code

R is KOER

33

(O,M)

ALL – EGR did not open/ respond during test or if memory code, did not open intermittently – EVP EVR PFE

41

(R)

System lean – Fuel control

(M)

System was lean for 15 seconds or more (no HO2S switching) – Fuel control

95

(O)

Fuel pump: open, bad ground or always on – Power / Fuel Pump Circuits

(R)

AIR not Diverting (AIRD) – Air Injection

(M)

Possible bad fuel pump ground or open between fuel pump and pin 8 at PCM (Fuel Pump Monitor signal) – Power / Fuel Pump Circuits

42

(R)

System rich – Fuel control

(M)

System was rich for 15 seconds or more (no HO2S switching) – Fuel control

77

System did not receive “goose” test – see TESTS

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Jeremy

Expert:  Jeremy replied 10 months ago.

Do you still need assistance with this?