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94 4.0L Auto Error code 177


rumblecloud

5+ Year Member

⭐Supporting Member
Joined
Mar 6, 2020
Messages
1,905
Points
601
City
48022
State - Country
MI - USA
Vehicle Year
1994
Vehicle
Ford Ranger
Engine
4.0 V6
Transmission
Automatic
Total Lift
1-1/2 inch front leveling
Total Drop
Stock
Tire Size
31/10.50/15
My credo
What's the worst that could happen?
Getting a 177 error code after engine warms up - about 5-7 minutes. It is a "Continuous Memory" code that shows HEGO ((HO2S) Sensor fault/always rich.
HEGO = Heated Exhaust Gas Oxygen sensor. So what exactly is it telling me? I get that it's telling me it's running a rich mix, but why does it take 5-7 minutes to show up?

I did have an exhaust leak at the connection of the crossover to the headers, but that has been taken care of - so no exhaust issues that oould cause that. Could the headers cause it? I'm not too alarmed by it, but wold like to know more about it, causes, etc. Thanks in advance.
 

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