Engine Codes, Round 2
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From: Medford, OR
Engine Codes, Round 2
I replaced my MLPS last week and that eliminated the hard shifting along with one of the codes I was throwing. My check engine light still comes on after driving for 10 minutes or so. With the KOER test I am getting a code 173: HEGO (HO2S) Sensor Fault/Rich. The only continuous codes I am pulling are the same 173 code, and a 628: Excessive Converter Clutch Slippage. The truck does smell like it is running rich. I replaced the o2 sensor about 7 months ago, but it never cleared the code. Besides running rich the only noticeable problems with the truck, which may or may not be related, are a hesitation at light throttle and a recently developed problem where black smoke billows out of my exhaust if I rev it up while in park or neutral. I don't notice any smoke when driving. I really appreciate any input on what could be causing these problems! Thanks.
Aaron
Aaron
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Elder User
Joined: Mar 2003
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From: Medford, OR
After doing some searching I have noticed that if the motor is running rich it can cause the black smoke, which would be consistent with the code I am pulling for that. What would normally cause that? Thanks.
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