P2299 — Brake Pedal Position/Accelerator Pedal Position Incompatible

OBD2 code P2299 flags a problem with the throttle and intake air metering (brake pedal position/accelerator pedal position incompatible). Short, gentle driving to a shop is usually possible. Common culprits: contaminated or failed MAF/MAP sensor, intake air leaks after the MAF sensor, wiring or connector faults in the throttle circuit.

powertrain (engine/transmission)

Is it safe to drive?

Drive with caution Drive with caution. Many throttle faults put the car into limp mode with limited power — enough to reach a shop, not for highway trips. If the engine stalls or the pedal stops responding, do not drive.

How to diagnose with an OBD scanner

Read the code and freeze frame Connect an OBD2 scanner, confirm P2299 is stored, and save the freeze frame data — it shows engine conditions when the fault was detected.
Check for companion codes and TSBs Related codes often reveal the real root cause. Also check manufacturer technical service bulletins (TSB) for your make and model — many P0xxx issues have factory fixes or software updates. Search by VIN on the manufacturer site or nhtsa.gov.
Inspect wiring and connectors Visually inspect the wiring harness and connectors related to the throttle and intake air metering for damage, corrosion, chafing or poor contact.
Subsystem check Inspect and clean the throttle body; check that the plate moves freely.
Subsystem check Watch throttle position and MAF/MAP readings in live data while pressing the pedal — values should change smoothly.
Verify the repair Clear the code, complete a full drive cycle including the conditions from the freeze frame, and confirm P2299 does not return.

Approximate repair cost

Repair cost depends on which component actually failed. Typical scenarios for P2299 (parts and labor, USD, independent shop rates): Replace the throttle body assembly: $250–$700; Replace the MAF or MAP sensor: $150–$400; Clean the throttle body: $80–$200. Overall, fixing P2299 usually costs between $80 and $700. An accurate diagnosis before buying parts saves money — the most expensive scenario is rarely the first one to check.

Common questions

How do I diagnose P2299 myself?

Start with a scan: confirm P2299, save the freeze frame and note any companion codes. Then inspect the wiring and connectors related to the throttle and intake air metering, and verify the suspect component against live data before buying parts.

What does OBD2 code P2299 mean?

Will P2299 clear itself?

Sometimes P2299 clears after a few drive cycles if the fault was intermittent — for example a loose connector or a tank of bad fuel. The underlying cause usually remains, so the code tends to return. Clear it once; if it comes back, diagnose rather than erase it repeatedly.

What are the symptoms of P2299?

Drivers most often notice: Check Engine Light on, stalling when coming to a stop, poor throttle response, unstable or high idle.

Is it safe to drive with P2299?

Drive with caution. Many throttle faults put the car into limp mode with limited power — enough to reach a shop, not for highway trips. If the engine stalls or the pedal stops responding, do not drive.

What does P2299 mean?

P2299 is logged by the onboard diagnostics when the throttle and intake air metering does not behave as expected. The official definition is “Brake Pedal Position/Accelerator Pedal Position Incompatible”. This is a powertrain (engine/transmission) category code.

To set P2299, the control module compares live readings of the throttle and intake air metering against calibrated limits, usually over several drive cycles. Alongside the code it stores a freeze frame — a snapshot of rpm, load, coolant temperature and vehicle speed at the moment of failure. Reading that snapshot first saves diagnostic time.

What causes P2299?

contaminated or failed MAF/MAP sensor
intake air leaks after the MAF sensor
faulty throttle position sensor or pedal sensor
failed electronic throttle motor
wiring or connector faults in the throttle circuit
dirty throttle body or stuck throttle plate

Common symptoms of P2299

Check Engine Light on
stalling when coming to a stop
poor throttle response
unstable or high idle
limp-home mode with reduced power

How to diagnose P2299

Connect an OBD2 scanner, confirm P2299 is stored, and save the freeze frame data — it shows engine conditions when the fault was detected.
Related codes often reveal the real root cause. Also check manufacturer technical service bulletins (TSB) for your make and model — many P0xxx issues have factory fixes or software updates. Search by VIN on the manufacturer site or nhtsa.gov.
Visually inspect the wiring harness and connectors related to the throttle and intake air metering for damage, corrosion, chafing or poor contact.
Inspect and clean the throttle body; check that the plate moves freely.
Watch throttle position and MAF/MAP readings in live data while pressing the pedal — values should change smoothly.
Clear the code, complete a full drive cycle including the conditions from the freeze frame, and confirm P2299 does not return.

How to fix P2299

Start with the cheapest and most common causes before replacing expensive parts:

Replace the throttle body assembly — $250–$700
Replace the MAF or MAP sensor — $150–$400
Clean the throttle body — $80–$200

How much does it cost to fix P2299?

Repair cost depends on which component actually failed. Typical scenarios for P2299 (parts and labor, USD, independent shop rates):

Replace the throttle body assembly: $250–$700
Replace the MAF or MAP sensor: $150–$400
Clean the throttle body: $80–$200

Overall, fixing P2299 usually costs between $80 and $700. An accurate diagnosis before buying parts saves money — the most expensive scenario is rarely the first one to check.