DTC P1127 - Acceleration Pedal 1 Sensor Circuit Low🔗
Conditions for Setting DTC P1127🔗
- Engine Running
- Acceleration Pedal 1 Sensor ≤ 0.1 volts
- The above must be present for a period of 128 instances/cycles or greater to trigger DTC P1127
| Step | Action | Value(s) | YES | NO |
|---|---|---|---|---|
| 1 | - Key ON, Engine OFF - Within VCM Live, open the Accel Pedal 1 sensor DTC Minimum parameter, does the Accel Pedal 1 sensor parameter display 0.1 volts or less? |
0.1 volts or less | Go to Step 2 | Intermittent Issue - Refer to Intermittent Diagnostics |
| 2 | - Slowly increase the acceleration pedal while observing the Accel Pedal 1 sensor voltage - Does the parameter ever display 0.1 volts or less? |
0.1 volts or less | Go to Step 3 | Intermittent Issue (Refer to Intermittent Diagnostics (Page 41)) |
| 3 | - Disconnect the APP sensor connector and the ECU connector "D" - Check for continuity between the APP sensor connector cavity "B" and ECU connector "D" pin 20 - Do you have continuity between them? |
Go to Step 4 | Repair the circuit as necessary, locate any wires that need to be repaired or replaced | |
| 4 | - Disconnect the APP sensor connector and the ECU connector "C" - Check for continuity between the APP sensor signal connector cavity "E" and ECU connector "C" pin 11 - 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 | - Disconnect the APP sensor connector and the ECU connector "C" & "D" - Check for continuity between both APP sensor 5 volt reference connector cavity "C" & "D" and ECU connector "C" pin 11 & Connector "D" pin 11 - Do you have continuity between them? |
Go to Step 6 | Repair the circuit as necessary, locate any wires that need to be repaired or replaced | |
| 6 | - Inspect all pins and terminals for any corrosion, physical damage, and contamination - Any issues found? |
Repair any pins or terminals that have been damaged. | Go to Step 7 | |
| 7 | - Replace the ACC Pedal 1 Sensor - 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 stored codes - Does the engine operate without any stored DTC's? |
System is now operational and ready to be tuned | Contact HP Tuners Support |