P2478Powertrain (P)generic
Exhaust Gas Temperature Out of Range Bank 1 Sensor 1
The exhaust gas temperature sensor on the right side of the engine is reading a temperature that is outside the normal operating range, either too hot or too cold. This sensor helps the engine monitor emissions and performance, so an incorrect reading can cause improper fuel mixture and ignition timing. The engine may run poorly, produce excess emissions, or enter a reduced-power mode.
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