DTC P2122 - Throttle Position 2 Sensor Circuit Low
Conditions for setting dtc P2122
| ￭ | Engine Running |
| ￭ | Throttle Position 2 Sensor ≤ 0.1 volts |
| ￭ | The above must be present for a period of 128 instances/cycles or greater to trigger DTC P2122 |
|
Step |
Action |
Value (s) |
YES |
NO |
|
1 |
- Key ON, Engine OFF - Within VCM Live, open the TPS 2 DTC Minimum parameter, does the TPS sensor parameter display 0.1 volts or less? |
≤ 0.1 volts |
Go to Step 3 |
Go to Step 2 |
|
2 |
- Slowly depress the foot pedal while observing the TPS voltage parameter within VCM Live - Does the TPS voltage ever fall below 0.2 volts? |
≤ 0.2 volts |
Go to Step 3 |
Intermittent Issue (Refer to Intermittent Diagnostics) |
|
3 |
- Key OFF - Disconnect the TPS connector and jump the 5 volt reference cavity 1 & the TPS signal cavity 3 together at the TPS connector - Key ON - Does the TPS parameter within VCM live display a voltage of 4.0 volts or greater? |
|
Go to Step 6 |
Go to Step 4 |
|
4 |
- Key OFF - Disconnect the ECU harness connector "C" - Using a DVOM check continuity between the TPS connector signal cavity 3 & the ECU connector "C" pin 25 - Do you have continuity between them? |
|
Go to Step 5 |
Repair the circuit as necessary, locate any wires that need to be repaired or replaced |
|
5 |
- Replace the ECU - Is the replacement complete? |
|
Go to Step 8 |
N/A |
|
6 |
- Inspect the TPS wire harness connector terminals for corrosion or contamination - Any issues found? |
|
Repair the circuit as necessary and fix any pins with corrosion or contamination |
Go to Step 7 |
|
7 |
- Replace the TPS - Is the replacement complete? |
|
Go to Step 8 |
N/A |
|
8 |
- Clear any DTC from the ECU - Turn the ignition off and wait 30 seconds - Start the engine and operate the engine to full operating temperature - Observe the Check Engine Light on the Menu bar in VCM Live - After operating the engine within the test parameters, check for any store codes - Does the engine operate without any stored DTC's? |
|
System is now operational and ready to be tuned |
Contact HP Tuners Support |
Table 46. Throttle Position 2 Sensor Circuit Low Diagnostics Table
