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P2138 Diagnostic Trouble Code Discussion for March 2014

Accelerator Position Sensor 1-2 Correlation

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Trouble Ticket Help Requests for DTC P2138
Help Request Posted
2005 Subaru Legacy GT 2.5L Poor Idle Quality, Stall, MIL Lamp on VIN: 4S3BL68675
P2138: Throttle Pedal Position Sensor D-E Voltage Rationality. ... problem.At times it will only idle and throws code p2138.We finally got it to happen for us and we recorded following data.sub accel.sensor 1.16v at idle-main accel.sensor1.04v at idle and both change when you push pedal to 3.68v.Throttle motor duty -7 and...
March 01, 2014