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2003 chevy
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i have a 2003 TB, V6 4WD. im getting this code that comes and goes. i got the code checked, here's the diagnostic. it says fuel trim bank one condition. the fuel system for bank 1 was too rich. probable causes are:
1. if bank one and two codes set together suspect the MAF sensor
2. O2 sensor
3. ignition misifre
4. fuel injectors
i've already replaced the O2 sensor and spark plugs. ive also added fuel injector cleaner into the system. the injectors were cleaned about 15k miles ago. the code went away for a while, but once i took the truck on the freeway past 65, the SES light came back. should i try replacing the MAF sensor now? please any help. thanks.
 
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