The following is from the Ford TSP:
Diagnostic Trouble Code (DTC) P0122 indicates the TP sensor signal is less than the Self-Test minimum value of 3.43% (0.17 volts).
NOTE:
Throttle Position Sensor A (TP-A) is the same as Throttle Position (TP) Sensor.
NOTE:
An intermittent fault can cause a Continuous Memory DTC P0122. If a Continuous Memory DTC P0122 is still present after DH11 through DH14, go to «DH20».
Possible causes:
-- Damaged TP sensor.
-- TP not seated properly (tightened down).
-- Open TP SIG or VREF harness.
-- TP SIG harness short to SIG RTN or PWR GND.
-- Damaged PCM.
* Key off.
* Disconnect TP sensor. Inspect for damaged or pushed out pins, corrosion, loose wires, etc. Service as necessary.
* Leave TP sensor disconnected.
* Jumper VREF circuit to TP circuit at the TP sensor vehicle harness connector.
* Key on, engine off.
NOTE: If any Scan Tool communication problem exists, remove jumper and go to «DH14».
* Access TP PID (TPV PID) with the Scan Tool.
* Is the TP PID (TPV PID) greater than 92.27% (4.60 volts)?
Yes
TP SIG shorted to SIG RTN in TP sensor, or TP SIG or VREF open in TP sensor. REPLACE TP sensor. REMOVE jumper. RERUN «Quick Test».
No
VREF or TP SIG open in harness or PCM, or TP SIG shorted to SIG RTN (or PWR GND) in harness or PCM. REMOVE jumper. GO to «DH12».
96 Contour SE
Duratec V6 24-valve 2.5L ATX
108,000 mi.
Replaced: crankshaft w/ DMD, EGR valve (clogged), EVR, DPFE, PCV valve, evap emissions hose & tube (cracked), window regulator (broken), LH & RH PCV tubes, UIM gasket (leak), ignition coil
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