P0172 Diagnostic Trouble Code Discussion for November 2018
Fuel System Rich (Bank 1)
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| Help Request | Posted | |
| 2006 Toyota Tundra SR5 4.7L MIL Lamp on VIN: 5TBRT34126 P0172: Fuel System Too Rich (Bank 1). I have a 4.7 tundra with rich codes. Smoked the system and no leaks. Both up stream sensors are at 3.25 volt and will change with load. The rear 02 sensors are at .85 and stay there. If i create a vacuum leak the fronts will go to 4.2 then come back to 3.2... |
November 05, 2018 |
