Accelerator Pedal (AP) Sensor. Code 9400????

[AlanS]

2006 xc70 I had a dash message that the car was in Reduced Performance ....Took it to a friend with a reader...this is the result: Any thoughts on this code? 9400- Accelerator pedal (AP) sensor- Signal low, Internet says that I need to replace the Brake Booster Sensor... Your thoughts?

[xHeart]

2006 xc70 I had a dash message that the car was in Reduced Performance ....Took it to a friend with a reader...this is the result: Any thoughts on this code? 9400- Accelerator pedal (AP) sensor- Signal low, Internet says that I need to replace the Brake Booster Sensor... Your thoughts?

FROM VIDA

ECM-9400
Fault indicates either signal too high or low from the brake position sensor located in the brake booster, or that the signal from the position sensor is indicating at the pedal is pressed, but the brake light switch is not yet activated.

This will cause the cruise control to be disabled during the whole driving cycle in which the fault was detected. This fault is usually caused by a poorly adjusted brake light switch or a faulty position sensor. Note! It is possible to have the fault and no cruise control without setting the fault code.