P2299 indicates that the powertrain control module has detected conflicting signals from the brake pedal position and accelerator pedal position sensors, generally interpreting that both pedals are being applied at the same time. This correlation fault is a safety check intended to prevent simultaneous braking and acceleration. The issue most commonly stems from sensor or wiring problems rather than the control module itself.
A sticking, worn, or poorly adjusted brake switch can send a constant or intermittent brake-applied signal, creating a conflict with the accelerator pedal position reading even when the brake pedal is released.
Degraded contacts or corrupted voltage output from the APP sensor can produce erratic throttle angle data that the PCM interprets as incompatible with the brake switch state.
Shorts to power or ground, open circuits, or corrosion in the harness between the pedals and the PCM can cause incorrect voltage readings that mimic simultaneous pedal application.
Floor mats obstructing the accelerator pedal, aftermarket pedal covers, or two-footed driving can physically hold both pedals down at once, triggering the correlation fault.
Although extremely rare, an internal control module fault or outdated calibration can misinterpret correct sensor inputs as incompatible; this should only be considered after all sensors and wiring are proven sound.
The vehicle is usually drivable, but many systems will enter reduced-power mode as a safeguard. You should diagnose the fault promptly to avoid unexpected power loss during braking.
No. Replacing the PCM is almost never the correct repair for this code; the vast majority of cases are resolved by correcting the brake switch, accelerator sensor, wiring, or a mechanical obstruction.
The PCM intentionally reduces throttle opening when it detects conflicting pedal signals to prevent unintended acceleration while braking, which results in limited engine power.
Yes. If a floor mat or pedal cover holds the accelerator down while the brake is pressed, or prevents the accelerator from fully returning, the PCM can detect incompatible pedal positions and store P2299.