
Recently my car board has been lit up a check engine light...Since a light came up, the car accelerates very slowly above half range press on gas pedal.
Checked the code with OBDII Reader and diagnostics showed code P0220 Throttle position sensor circuit B.
I opened the accelerator pedal position sensor in engine compartment and it is 1920AK model part number.
The car i am driving is Citroen Xsara Picasso 2.0 HDI Year 2002 66KW...
CODE ON CHASIS for service programs is 20814...and it is in Mint condition exept for that fault...
TPS is one of inductive types and obd reader does not register any change on TPS pedal press!?
I have checked yesterday voltages on 4wire TPS harnes plug which reads YellowGreen -12V, green -12V, redish -8V and fourth -12V...That is very strange to my knowledge?
Today is different situation I've just checked TPS voltage and yellogreen is 0v connected to earth, green gives 5v, redish one gives 0.5 to 3.7v dependant on pedal press and the fourth one is 9.5v...cleared codes 0202 and now 0102...still no input on throttle from cheap obd2 diagnostic from china...but dashboard does not reproduce check engine light...
Now, is this the classic clinnical case for 2 ground wires MAF Mod?

EDIT
VF7**************[VIN obfuscated, can be read by forum staff]