The P2299: Brake Pedal Position/Accelerator Pedal Position Incompatible code is triggered when the ECM detects a situation where both the brake and accelerator pedals are being pressed in a manner that is considered incompatible or conflicting. This may be due to faulty sensors, wiring issues, or improper calibration of the brake or accelerator pedal sensors.
P2299 – Quick Overview
Code | Information |
---|---|
Meaning | P2299: Brake Pedal Position/Accelerator Pedal Position Incompatible |
Is it serious? | Yes, this condition can cause unpredictable vehicle response, including unintended acceleration or stalling. Immediate attention is required for safe vehicle operation. |
Possible causes | – Mismatch between brake and accelerator pedal positions – Faulty sensors or wiring – Calibration issues |
How to diagnose? | – Check sensor operation and calibration – Inspect wiring and connections – Verify brake and accelerator pedal positions |
P2299 Meaning
The P2299: Brake Pedal Position/Accelerator Pedal Position Incompatible code indicates that the ECM has detected a conflict between the brake and accelerator pedal positions, meaning that the two signals do not correlate in a logical or expected way. This might happen if the accelerator pedal is pressed at the same time as the brake, or if one of the sensors is faulty and providing incorrect information to the ECM. This situation may lead to safety concerns, such as unintended acceleration or braking issues.
Step-by-step diagnostic guide
Action | Description | Tools Needed |
---|---|---|
Check for Other Codes | Use an OBD-II scanner to check for any additional codes that could indicate related issues with the throttle, brake system, or electronic control modules. | OBD-II Scanner |
Inspect Brake Pedal Position Sensor | Visually inspect the brake pedal position sensor for signs of damage or wear. Ensure that the sensor is properly mounted and not loose. | Flashlight, Hand Tools |
Inspect Accelerator Pedal Position Sensor | Visually inspect the accelerator pedal position sensor for damage, wear, or loose connections. Check for any physical obstructions affecting pedal movement. | Flashlight, Hand Tools |
Test Sensor Operation | Use a diagnostic tool to monitor live data from both the brake pedal and accelerator pedal sensors. Observe if the readings change smoothly and correctly when the pedals are operated. | Diagnostic Tool |
Verify Sensor Calibration | Use a scan tool to verify the calibration of the brake and accelerator pedal sensors. If necessary, recalibrate these sensors using manufacturer procedures to ensure accurate readings. | Diagnostic Tool, Vehicle Service Manual |
Inspect Wiring and Connectors | Check the wiring and connectors for both sensors. Look for frayed wires, corrosion, loose connections, or signs of damage that could lead to incorrect signals. | Flashlight, Multimeter |
Check Sensor Signals During Operation | While the vehicle is stationary, press the brake and accelerator pedals separately and observe the corresponding voltage changes from both sensors. Any erratic or mismatched readings should be addressed. | Multimeter, Diagnostic Tool |
Check for Obstructions in Pedal Movement | Ensure that there are no physical obstructions around the brake or accelerator pedals that could lead to a situation where both are activated simultaneously. | Visual Inspection |
Replace Faulty Sensors if Necessary | If either the brake pedal position sensor or accelerator pedal position sensor is found to be faulty, replace the sensor with an OEM part to ensure proper operation and compatibility. | Replacement Sensor |
Clear the Code and Test Drive | After making the necessary repairs or adjustments, clear the P2299 code using an OBD-II scanner. Take the vehicle for a test drive and monitor pedal behavior to ensure the issue has been resolved. | OBD-II Scanner, Vehicle Owner’s Manual |
Recheck for Codes | After the test drive, re-scan the vehicle to verify that the P2299 code has not returned. If the code persists, further in-depth diagnostics may be necessary, focusing on the ECM and sensor interfaces. | OBD-II Scanner |

OBD-II scanner Buyer’s Guide
- Scanner features explained
- Different types of scanners
- Scanners for coding/odometer/ECU/checks
- Best picks + discount codes

Hi, I am Juraj “Yuri” Lukacko. I got frustrated by unhelpful and scammy mechanics, so I decided to learn everything about car diagnostics myself. I test dozens of new car diagnostic tools every month along with learning new strategies to fix and customize cars. About Juraj Lukacko (Yuri)