EPC and traction lights came on. Code P2138

[The Law]

So I've had an intermittent issue of my EPC and traction lights coming on and a slight loss of power/ autobox wanting to stay in lower gears.
I used my OBD2 reader and there was one single code of P2138 which is throttle/pedal position sensor/switch D/E voltage correlation.

So likely culprits are throttle position sensor, or crankshaft position sensor from what I've read.

Thing is, the fault has now gone away and the code is gone too?

Read more at: P2138 DTC Throttle/Pedal Pos Sensor/Switch D / E Voltage Correlation
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