P0222 Throttle Position Sensor 2 Circuit Low

When monitored P0222 Throttle Position Sensor 2 Circuit Low - With the ignition on, battery voltage greater than 6.98 volts. The TPS 2 voltage is less than 0.16 volts for 0.07 seconds. Default actions this code The ETC light illuminate, the MIL light illuminate, the Throttle input and vehicle speed are limited.


P0222 Throttle Position Sensor 2 Circuit Low


Possible causes:
  • 5-Volt supply circuit open.
  • 5-Volt supply circuit shorted to ground.
  • TPS signal 2 circuit shorted to ground.
  • TPS signal 2 circuit shorted to the TPS return circuit.
  • Throttle Position Sensor/Throttle Body.
  • Powertrain Control Module (PCM).

Diagnose P0222 Throttle Position Sensor 2 Circuit Low

Step 1. Check for an active DTC
When this DTC is active the engine speed, torque and vehicle speed are limited to a limp in mode. If a 5-Volt reference DTC has also set, diagnose the 5-volt DTC before continuing. If P2101 is also set, make sure that the blade moves freely and does not hang up near Wide Open Throttle before trying to repair P0222. Turn the ignition on, with the scan tool, read DTC.

Is the DTC active or pending?

Yes, go to step 3.
No, go to step 2.

Step 2. Throttle Follower Test
Turn the ignition on. With the scan tool, perform the ETC Throttle Follower Test. Monitor the TPS 2 voltage, slowly press the accelerator pedal down. The voltage for TPS 2 should start at approximately 4.3 volts and increase to approximately 0.7 volts.

Is the TPS 2 voltage within the range of the listed specification?

Yes, perform the PCM intermittent condition.
No, go to step 3.

Step 3. Check the 5-Volt supply circuit
Turn the ignition off, disconnect the Throttle Body harness connector. Turn the ignition on, measure the voltage on the 5-Volt supply circuit at the Throttle Body harness connector.

Is the voltage between 4.9 and 5.1 volts?

Yes, go to step 4.
No, repair the 5-Volt supply circuit for an open or short to ground.

Step 4. Check the TPS 2 signal circuit for a short to the ground
Turn the ignition off, disconnect the PCM harness connector. Check for continuity between ground and the TPS 2 signal circuit at the Throttle Body harness connector.

Is there continuity between ground and the TPS 2 signal circuit?

Yes, repair the TPS 2 signal circuit for a short to ground.
No, go to step 5.

Step 5. Check for the TPS 2 signal circuit shorted to the TPS sensor return circuit
Check for continuity between the TPS 2 signal circuit and the TPS return circuit at the Throttle Body harness connector.

Is there continuity between the TPS 2 signal circuit and the TPS return circuit?

Yes, repair the short between the TPS sensor return circuit and the TPS return circuit at the Throttle Body harness connector.

No, go to step 6.

Step 6. Throttle Position Sensor
Reconnect the PCM harness connector. Connect a jumper the TPS 2 signal circuit and the TPS return circuit at the Throttle Body harness connector. Turn the ignition on, with the scan tool, monitor the TPS 2 voltage.

Is the voltage read 0.0 volts with the jumper in place?

Yes, verify that there is good pin to terminal contact in the Throttle Body and Powertrain Control Module (PCM) connectors. If no problems are found, replace the Throttle Body Assembly.

No, go to step 7.

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