P0223

Wiring Diagram:

TP Sensor 2 Circuit High Voltage:

P0223- TP SENSOR 2 CIRCUIT HIGH VOLTAGE
The throttle actuator control (TAC) module contains two throttle position (TP) sensors with a common 5 volt supply, a common ground, and two independent signal circuits that vary resistance according to changes in throttle plate position. The ECM measures the signal voltage from each TP sensor, which is a reduced value of the ECM 5 volt reference. As the throttle plate opens from 0% throttle to wide open throttle, the voltage on the TP sensor 1 signal increases from 0.50 volts to 4.25 volts (+/-0.1 volts), while the voltage on the TP sensor 2 signal decreases from 4.45 volts to 0.70 volts (+/-0.1 volts). DTC P0223 sets when TP sensor 2 signal voltage at the ECM is above the calibrated voltage value.

DTC PARAMETERS
DTC P0223 will set it TP sensor 2 signal voltage is greater than 4.80 volts when:
^ Condition exists for longer than 140 ms
^ Battery voltage greater than 7.0 volts

DTC P0223 diagnostic runs continuously with engine running.

P0223 is a type A DTC for 2002, type B DTC for 2003

NOTE: The MIL will only illuminate if the fault is present for longer than 5 seconds. (2002 only)

DIAGNOSTIC AIDS
To locate an intermittent problem, use Scan tool to monitor TP SENSOR 2 voltage with ignition On, engine Off. Wiggling wires while watching for a change in TP SENSOR 2 voltage may locate area where an open in the ground circuit or a short to voltage in the wiring may exist.

If a TP sensor 1 signal circuit fault is detected, the ECM will default to REDUCED POWER mode if vehicle speed is below 56 km/h (35 mph) with APP angle at 0%. Otherwise, when the circuit fault occurs, TP sensor 2 will be used and vehicle performance will not be affected.

NOTE: The ECM will remain in these conditions for the entire ignition cycle even if the fault is corrected

Circuit 486 (TP sensor 1/TP sensor 2) and circuit 1274 (APP sensor 2) share the same 5 volt reference supply (5 volt Ref-B).

The CMP/ECT/IAT/EGR/MAF/MAP/TP1/TP2 sensors share the same sensor return circuit 652.

NOTE: TP ANGLE on Scan tool is based off of TP sensor 1 only.