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Discussion Starter #1
After getting my oil changed and then putting some STP brand injector cleaner in my 2003 Dbl cab 4x4, my check engine light has come on. Any DIY tips to try to get it reset??? Clueless in Texas.:confused:
 

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2000 Tacoma TRD
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Yup, go to AutoZone and have them retrieve the codes for free from your truck. Then let us know what they are and we can help you from there. I'm going to guess it is P0171.
 

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Discussion Starter #5
The code retrieved is P0031. According to Autozone this means BBOxygen sensor heater control circuit low-bank 1 BB sensor 1:

Probable causes:
BB1-open or short circuit condition
BB2-poor electrical condition
BB3-failed oxygen sensor
BB4-EFI relay fault

Any ideas on where to start and where O2 sensor is located?

Thanks for any help.
 
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