Having problems with your 2003 Chevrolet TrailBlazer ?
Engine bogs when the temperature is above 85 degrees with a PO 172 "Rich Bank 1" (it's a straight 6) code. Is there more to it than replacing the NO1 and/or NO2 sensors?
U may have a bad theromostat or ur timing may be off
Repair Help & Product Troubleshooting for 2003 Chevrolet TrailBlazer
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