2013 Toytoa Tundra sr5 4x4 5.7

Asked by Bill Jun 10, 2020 at 10:02 AM about the 2013 Toyota Tundra Grade CrewMax 5.7L FFV 4WD

Question type: Maintenance & Repair

My 2013 Tundra has the check engine light on and the trac off light on. Also the
4low light flashes constantly. its throwing code po172. Says bank 1 is running to
rich. Any ideas? Everything I read says it should be running bad but I cant tell
any difference it even idles extremely smooth

1 Answer

129,695

The P0172 code is telling you that there is too much gasoline in the exhaust exiting the combustion chamber. The ECU uses the mass air flow sensor (MAF), oxygen sensors (O2), and manifold absolute pressure (MAP) to monitor the air-fuel ratio. Because of this, you have a CEL illuminated. And because of this, the computer has disabled traction control. I'd guess that the trac off is why the case light is flashing.

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