P2299

P2299-BRAKE PEDAL POSITION / ACCELERATOR PEDAL POSITION INCOMPATIBLE

For a complete wiring diagram, refer to the Wiring Information.

Theory of Operation

This diagnostic tests for a stuck throttle or throttle position sensor. The algorithm only runs when detected throttle position is above 8% and maintains a position within 2% for more than two seconds. If the brake pedal is pushed during that time, the diagnostic will fail. This fault will not occur if the brake pedal is applied first and then the throttle pedal is engaged. If this diagnostic runs and fails the Powertrain Control Module (PCM) will light a momentary ETC lamp. The ETC lamp will only be active when the condition exists. While the error is active the customer will likely experience a throttle derate. The throttle position must be below 8% with both brake switches off in order for this error to reset.

- When Monitored:
Engine on, throttle position maintained above 8% with less than a 2% deviation in two seconds.

- Set Condition:
Brake pedal is depressed during the monitored conditions.





Always perform the Pre-Diagnostic Troubleshooting procedure before proceeding. Pre-Diagnostic Troubleshooting Procedure.

1. OTHER DTCs

NOTE: The most likely causes of this DTC being set is for the operator of the vehicle to have one foot on the brake while driving or a misadjusted brake switch which is coming on intermittently.

1. Ignition on, engine not running.
2. With the scan tool, read DTCs.

Are there DTCs for the accelerator pedal position sensors or brake switch present?

Yes

- Repair those DTCs before proceeding.

No

- Go To 2

2. PEDAL POSITION SENSOR OR BRAKE SWITCH
1. Start the engine.
2. Use the scan tool to monitor accelerator pedal position.
3. Move throttle through a range of positions.
4. Also depress the brake pedal.
5. Monitor the brake position on the scan tool.

Does the reported accelerator pedal position and brake position match actual position?

Yes

- Go To 3

No

- Troubleshoot accelerator pedal position sensor or brake switch.

3. TWO FOOTED DRIVING
1. Inform the customer that driving the vehicle with both feet can cause this condition.

Is the owner a two footed driver?

Yes

- Repair complete.

No

- Go To 4

4. BRAKE SWITCH
1. Replace the brake switch.
2. Ignition on, engine not running.
3. With the scan tool, erase DTCs.
4. Test drive the vehicle.
5. With the scan tool, read DTCs.

Did the DTC reset?

Yes

- Replace the Powertrain Control Module.
- Perform the POWERTRAIN VERIFICATION TEST - 6.7L. Powertrain Verification Test.

No

- Repair complete.
- Perform the POWERTRAIN VERIFICATION TEST - 6.7L. Powertrain Verification Test.