Brake and Accelerator Pedal Position Conflict
The P2299 code indicates that the Engine Control Module (ECM) has detected simultaneous input from both the brake pedal and accelerator pedal, which is physically impossible under normal driving conditions. This typically occurs when the brake pedal position sensor and accelerator pedal position sensor send conflicting signals, often due to a mechanical issue like a stuck accelerator pedal or a misadjusted brake light switch. The ECM interprets this as a fault to prevent unintended acceleration.
1. Most Common Causes
- Faulty or out-of-calibration accelerator pedal position (APP) sensor
- Faulty or misadjusted brake pedal position (BPP) sensor
- Short, open, or high resistance in APP or BPP sensor wiring or connectors
- Electromagnetic interference (EMI) on signal lines
- Internal PCM failure (rare)
- Mechanical obstruction or binding of the pedals
2. Symptoms You Will Notice
- Check Engine Light illuminated
- Reduced engine power or limp mode
- Cruise control disabled
- Hesitation or surging during acceleration
- Brake lights may stay on or not work properly
3. Step-by-Step Diagnosis
Step 1: Use a scan tool to verify P2299 and check for other related codes.
Step 2: Inspect brake and accelerator pedal sensors for proper operation using live data.
Step 3: Check brake light switch adjustment and operation.
Step 4: Visually inspect accelerator pedal and throttle linkage for binding or sticking.
Step 5: Test wiring and connectors for damage, corrosion, or loose connections.
4. Frequently Asked Questions
Is it safe to drive with this code?▼
No, it is not safe. The vehicle may enter limp mode or experience unintended acceleration. Have it diagnosed immediately.
How much does it cost to fix?▼
Typically between $50 and $150 for diagnosis and repair, but costs can vary if sensors or wiring need replacement.
5. Commonly Affected Makes
This is a generic OBD2 code, potentially applicable to any manufacturer using this diagnostic standard.