P2299 OBD-II Trouble Code: Brake Pedal Position / Accelerator Pedal Position Incompatible

Check Engine Light

P2299 is an OBD-II generic code that is triggered when the engine control module (ECM) detects that the brake pedal position is depressed, and the accelerator pedal position sensor shows that the throttle is open at the same time.

What causes the P2299 code?

  • The ECM checks the brake pedal position and senses that the brakes are applied, then the accelerator pedal position is indicating an open throttle.
  • The driver has pressed the brake and accelerator pedal at the same time.
  • The brake pedal position sensor is stuck on or the accelerator pedal position is stuck in an open throttle position or the sensor is defective.

What are the symptoms of the P2299 code?

  • The check engine light will be illuminated and the P2299 code is set in ECM memory as a fault.

  • The ECM will cut the amount the throttle will be allowed to open and will go into failure mode.

  • If the problem goes away, then the engine will go back to operating normal again.

How does a mechanic diagnose the P2299 code?

  • Scans for codes and documents them in the ECM then looks at the freeze frame data for failure

  • Scans the ECM to see if the brake pedal position is indicating that the pedal is in the up or off position

  • Scans the ECM and checks accelerator pedal position is showing a closed throttle

  • If both sensors are showing normal conditions, asks driver if they sometimes use one foot to press the brake and the other to press the gas pedal

Common mistakes when diagnosing the P2299 code?

  • Clearing ECM memory codes before checking the freeze frame data for the main failure problem, so the failure may be duplicated and repaired.

  • Failing to clear the ECM codes after the codes are fixed so the ECM will turn off the Check Engine Light.

  • Failing to verify any failure before attempting a repair.

How serious is the P2299 code?

  • Code P2299 is a code indicating that the brake pedal and gas pedals are pressed at the same time and the ECM will go into reduced throttle every time. This is a safety precaution built into the ECM programing.

What repairs can fix the P2299 code?

  • Clearing the code and advising the driver to not drive with two feet.
  • Testing the brake pedal and accelerator pedal sensors as per the manufacture pinpoint tests.
  • Replacing sensors for the brake or throttle as directed by testing only.

Additional comments for consideration regarding the P2299 code

Code P2299 will come on if the brake and gas pedals are pushed at the same time. If the problem happens for longer than about 5 seconds then the light comes on and the ECM goes into failure mode. Some of the older vehicles will not have this protection built-in and will allow the throttle and brake pushed at the same time. This could cause the vehicle to not be stopped.

Need help with a P2299 code?

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