first off P2 codes are factory codes so googling those gets lies easy. only the shop manual VW is the right way and it even tells you step by step how to prove what is wrong, (tests)
country not told , engine yes, VW yes ,body yes. stick shift yes.
USA answers this web site no COUNTRY stated so must be told.
yes TBW cars the TB and pedal pots all must match or it goes to limphome, like all modern cars do i fact.
from the book (USA)it states clearly this.
Number of Trips to Set Code: 1
Trouble Code Conditions:
Engine started, battery voltage at least 11.5v, all electrical components off, ground connections between engine and chassis well connected, the ECM detected that the accelerator pedal position sensor signal was outside the parameters to function normally. Note: Both the Throttle Position (TP) Sensor and Accelerator Pedal Position Sensor are located at the accelerator pedal module and communicate the driver's intentions to the ECM completely independently of each other. Both sensors are stored in one housing.
Possible Causes:
- * Ground between engine and chassis may be broken
- * Throttle position sensor may have failed
- * Accelerator Pedal Position Sensor has failed
- * Throttle position sensor wiring may have shorted
- * Throttle position sensor has failed
- * Faulty voltage supply
- * ECM has failed <<<<(nah I say)
Trouble Code: P2128 (1.8L L4 VIN - Std)
Accelerator Pedal Position Sensor 'E' Circuit High Input
now learn this on TBW, throttle by wire,
you must do a learn cycle to swap parts for sure not willlyynillyyy
the TB and the pedal modules are married and turned
to like each other, and learm mode step is next. changing many parts, for sure all that guessing and throwing parts are hopeless.
Throttle Valve Control Module J338
Throttle Drive (for Electronic Power Control (EPC)) G186/
Throttle Drive Angle Sensor 1 (for throttle drive) G187/
Throttle Drive Angle Sensor 2 (for throttle drive). G188 6-pin electrical harness connector
2.
those are the parts.
I see no learn mode.
Final procedures
After the Repair work, the following work steps must be performed in the following sequence:
Check the DTC memory. Refer to Diagnostic Mode 03 - Read DTC Memory.
If necessary, erase the DTC memory. Refer to Diagnostic Mode 04 - Erase DTC Memory.
If the DTC memory was erased, generate readiness code. Refer to Readiness Code.
End of diagnosis.
the tests in them manual are long for both devices TB/pedal
reset All DTC errors at parts swaps and
key off
then pull battery NEG log for 1 or more hours.
then put back and tranny will self learn
and any others, told in the service manual
Next time ask what to do first, on modern cars.
Id have swapped the pedal parts all first.
reset all DTC
and pulled battery neg lug.
and waited, and put back battery and drive so PCM can learn the new PEDAL values, and also the TB (paired to it)
if that is too costly?
the manual shows the tests on each pint here Pedal and voltages and ohms to find the exact cause of the error, if lucky
do learn this, most go intermittence, and super hard to prove that.
best is replace the pedal POTS in whole.
if TB fails it too in whole and never buy used parts here.
cardone1 may have it but great quality rebuilt.
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