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2017 Ford Transit 3.7L - Accelerator Pedal Sensor DTC P2122
- Mgh
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11 hours 25 minutes ago - 5 hours 2 minutes ago #92844
by Mgh
2017 Ford Transit 3.7L - Accelerator Pedal Sensor DTC P2122 was created by Mgh
Hello everyone,Scratching my head here as I am trying to figure out an Accelerator Pedal Sensor issue on a 2017 Ford Transit 3.7L.
DTC P2122. Actual problem: reading battery voltage at one of the 2 sensors' ref wires.
Sensor 2:
APPVREF2 -> 5v when the car is running.
APPRTN2 -> tests fine when measured with the positive lead connected to power.
APP2 -> Signal reading changes when pushing the pedal
Sensor 1:
APPVREF1 -> 12v or ~14 when the car is running.
APPRTN1 -> tests fine
APP1 -> No signal when pushing the pedal
DTC is related to Sensor 1.
The above readings are consistent whether the connector at the pedal is plugged/unplugged.
I inspected the wires, everything looks clean, no corrosion from end to end. There is an intermediate connector, which I unplugged and inspected, looks good.I swapped 5v ref wires, the DTC went to Sensor 2, and the signal was working as I pressed on the pedal in sensor 1.There was a PCM lying around that I swapped, same battery voltage at the ref.
If disconnect the PCM, the battery voltage and 5v ref disappear. Same when I disconnect the connector, which I think supplies grounds and powers.Looks like I have short to power, and to me, everything is pointing to the PCM; but what are the chances of the other PCM having the same issue?
Any help would be appreciated, thank you!
- Val
DTC P2122. Actual problem: reading battery voltage at one of the 2 sensors' ref wires.
Sensor 2:
APPVREF2 -> 5v when the car is running.
APPRTN2 -> tests fine when measured with the positive lead connected to power.
APP2 -> Signal reading changes when pushing the pedal
Sensor 1:
APPVREF1 -> 12v or ~14 when the car is running.
APPRTN1 -> tests fine
APP1 -> No signal when pushing the pedal
DTC is related to Sensor 1.
The above readings are consistent whether the connector at the pedal is plugged/unplugged.
I inspected the wires, everything looks clean, no corrosion from end to end. There is an intermediate connector, which I unplugged and inspected, looks good.I swapped 5v ref wires, the DTC went to Sensor 2, and the signal was working as I pressed on the pedal in sensor 1.There was a PCM lying around that I swapped, same battery voltage at the ref.
If disconnect the PCM, the battery voltage and 5v ref disappear. Same when I disconnect the connector, which I think supplies grounds and powers.Looks like I have short to power, and to me, everything is pointing to the PCM; but what are the chances of the other PCM having the same issue?
Any help would be appreciated, thank you!
- Val
Last edit: 5 hours 2 minutes ago by Mgh.
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