P209A - Reductant Injection Air Pressure Sensor 'B' Circuit
P209a DescriptionThe Reductant Injection Air Pressure Sensor sends voltage reading information to the Powertrain Control Module (PCM). The PCM interprets these readings as pressure or exhaust gas temperature. The code is set when the voltage sent from the sensor to the PCM is out of factory specifications.
P209A Information for specific makes
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