Codes
Codes
Posting Guru
Joined: Dec 2002
Posts: 1,283
Likes: 0
From: Racine county, WI
Here's what my book says:
41 - HEGO (HO2) sensor voltage low / system lean
71 - (This is a constant code not an KOEO) Idle tracking switch closed on pre-position
72 - MAP, MAF or BP sensor out of range during Dynamic Responce Test
73 - Insufficient Throttle Position change durring Dynamic Response Test
Looks like when you were supposed to pin the throttle to WOT you didn't go far enough. I'd run the test again before you start digging into anything.
41 - HEGO (HO2) sensor voltage low / system lean
71 - (This is a constant code not an KOEO) Idle tracking switch closed on pre-position
72 - MAP, MAF or BP sensor out of range during Dynamic Responce Test
73 - Insufficient Throttle Position change durring Dynamic Response Test
Looks like when you were supposed to pin the throttle to WOT you didn't go far enough. I'd run the test again before you start digging into anything.
Postmaster
Joined: Dec 2001
Posts: 3,742
Likes: 2
From: UT
As noted, KOER72 and KOER 73 are almost always operator error. KOER 41 (especially in the absence of a memory (CM) 41) could also be from not preheating the O2 sensor immediately prior to the KOER test. As noted, review KOER test protocol and repeat test before doing anything else.
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