P0299 Ford Code - Turbo/Supercharger Underboost
Quick Answer
When the OBD-II code P0299 appears on a Ford vehicle, it indicates that the turbocharger or supercharger is underboosting. Common causes include Boost leak: A leak in the intake system, intercooler, or turbocharger piping can cause a loss of boost pressure, Faulty wastegate: The wastegate controls the amount of exhaust gases that reach the turbocharger, and a malfunction can lead to underboosting, Dirty air filter: A clogged air filter can restrict airflow to the turbocharger, affecting its performance. Severity is High - diagnose this code as soon as possible. Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
- What it means
- P0299 Ford indicates Turbo/Supercharger Underboost.
- Common causes
- Common causes include Boost leak: A leak in the intake system, intercooler, or turbocharger piping can cause a loss of boost pressure, Faulty wastegate: The wastegate controls the amount of exhaust gases that reach the turbocharger, and a malfunction can lead to underboosting, Dirty air filter: A clogged air filter can restrict airflow to the turbocharger, affecting its performance.
- Severity
- High - diagnose this code as soon as possible.
- Can I drive?
- Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
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Code P0299 Ford Description
When the OBD-II code P0299 appears on a Ford vehicle, it indicates that the turbocharger or supercharger is underboosting. This means that the forced air induction system is not providing the expected amount of boost pressure to the engine, resulting in reduced power and efficiency. The turbocharger or supercharger plays a crucial role in increasing the engine's power output by compressing air before it enters the combustion chamber. When the system is underboosting, it can lead to poor acceleration, reduced fuel efficiency, and potential engine misfires.
Common Causes of P0299 Ford
- Boost leak: A leak in the intake system, intercooler, or turbocharger piping can cause a loss of boost pressure.
- Faulty wastegate: The wastegate controls the amount of exhaust gases that reach the turbocharger, and a malfunction can lead to underboosting.
- Dirty air filter: A clogged air filter can restrict airflow to the turbocharger, affecting its performance.
- Faulty boost pressure sensor: The sensor that measures the boost pressure may be faulty, providing incorrect readings to the engine control module.
Symptoms of P0299 Ford
- Loss of power or acceleration: One of the most common symptoms of a turbo/supercharger underboost is a noticeable lack of power when accelerating.
- Engine hesitation: The vehicle may hesitate or stumble during acceleration, especially at higher speeds.
- Increased fuel consumption: The engine may consume more fuel than usual due to the inefficient combustion process caused by underboosting.
- Check Engine Light: The Check Engine Light may illuminate on the dashboard, indicating a problem with the turbo/supercharger system.
How to Fix P0299 Ford
- Inspect for boost leaks: Check the entire intake system, intercooler, and turbocharger piping for any leaks and repair or replace damaged components.
- Test wastegate operation: Verify that the wastegate is functioning correctly and adjust or replace it if necessary.
- Replace air filter: Install a new air filter to ensure proper airflow to the turbocharger.
- Check boost pressure sensor: Test the boost pressure sensor for accuracy and replace it if it is faulty.
- Clear codes and test drive: After completing the repairs, clear the diagnostic trouble codes (DTCs) from the vehicle's computer and test drive to ensure the issue has been resolved.
Cost to Fix P0299 Ford
The cost of repairing a turbo/supercharger underboost issue on a Ford vehicle can vary depending on the specific cause of the problem. In general, replacing components such as a boost pressure sensor or air filter may cost between $100 to $300, while repairing a boost leak or replacing a wastegate can range from $300 to $800. Labor costs can add an additional $100 to $500, depending on the complexity of the repair. It's important to consult with a qualified mechanic or service center to obtain an accurate estimate based on the specific diagnosis and repair required for your vehicle.
Tech Notes for P0299 Ford
2003-2007 Ford F-Super Duty
2004-2007 Ford E-350, E-450
2003-2005 Ford Excursion
Ford Factory Service Bulletin OBDII Code P0299
P0299 lack of power and turbo sticking on a 6.0 Powerstroke F250 diesel
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Frequently Asked Questions about P0299 Ford Code
1. What are the common symptoms of OBDII code P0299 in a Ford related to turbo/supercharger underboost?
- Common symptoms include reduced engine power, sluggish acceleration, illuminated check engine light, and possible turbo noise.
2. What are some possible causes of OBDII code P0299 in a Ford indicating turbo/supercharger underboost?
- Potential causes may include a faulty wastegate, boost pressure sensor issues, vacuum leaks, restricted air intake, or a malfunctioning turbocharger.
3. How can I diagnose the source of OBDII code P0299 in a Ford indicating turbo/supercharger underboost?
- Diagnose by checking for loose or damaged hoses, inspecting the wastegate operation, testing the boost pressure sensor, scanning for other related codes, and performing a boost pressure test.
4. Are there any quick repair tips for fixing OBDII code P0299 in a Ford due to turbo/supercharger underboost?
- Quick repair tips include checking and replacing any damaged hoses, ensuring proper wastegate function, cleaning or replacing the boost pressure sensor, and addressing any vacuum leaks.
5. Is it safe to continue driving with OBDII code P0299 indicating turbo/supercharger underboost in a Ford?
- It is not recommended to continue driving with this code as it can lead to further engine damage and potentially dangerous driving conditions. Have the issue diagnosed and repaired promptly.
6. Can a clogged air filter cause OBDII code P0299 in a Ford related to turbo/supercharger underboost?
- Yes, a clogged air filter can restrict airflow to the turbocharger, leading to underboost conditions and triggering the P0299 trouble code.
7. What role does the wastegate play in the turbo/supercharger system that could trigger OBDII code P0299 in a Ford?
- The wastegate regulates the exhaust gas flow to the turbocharger, controlling boost pressure. A malfunctioning wastegate can result in underboost conditions and trigger the P0299 code.
8. How can I prevent OBDII code P0299 from recurring in my Ford after repairing turbo/supercharger underboost issues?
- To prevent code recurrence, regularly inspect and maintain the turbo/supercharger system, ensure proper air intake, use high-quality fuel, and address any underlying engine issues promptly.
9. What are the potential long-term consequences of ignoring OBDII code P0299 indicating turbo/supercharger underboost in a Ford?
- Ignoring the code can lead to decreased engine performance, reduced fuel efficiency, potential turbocharger damage, and even engine failure in severe cases.
10. Is it necessary to reset the OBDII system after repairing OBDII code P0299 in a Ford related to turbo/supercharger underboost?
- Yes, it is recommended to reset the OBDII system after repairs to clear the trouble code and ensure that the issue has been successfully resolved.
Discuss the causes and fixes for P0299 Ford OBDII Code
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I own a 2012 F150 Lariat crew cab with check engine light starting constantly on. I checked diagnostic code for problem was P0299. Dealership stated they believe problem is with Wastegate Turbo. No problems noticed or noises heard while operating vehicle. It has been 3 months since I got diagnosed by dealership and still don't notice any issues with vehicle operating. Estimate for repair by dealership is approximately $2400.00. I am not sure what exact problem is but believe there could be cheaper repair?
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Have your tried clearing the code?
There is a factory service bulletin that recommends an special procedure to verified that the problem is the Wastegate Turbo. Did the dealer performed the procedure? If they didn't, then you should get a second opinion, you may just need to have the module update, which is a lot cheaper. -
I own a 2013 Ford Fusion SE 1.6L . As of yesterday my car pulls up 2 codes on the tester one of them is protective mode the other is P0299 what should I do because apparently the technicians at the dealerships doesn’t have a clue what it could be .
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There is a factory service bulletin that recommends replacing the Replace the turbocharger wastegate regulating valve solenoid for the P0299 code. I hope that helps
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Esta falha numa land rover discouvery sport 2.0 2019 a diesel estava relacionada ao filtro DPF, fazendo gerar falha P0299!
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this code came on on my ford edge 2013 what should i start out with to fix this issue?
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Do you have any more codes or symptoms?
For your 2013 Ford Edge, the most likely cause of the problem is the Turbocharger/Waste Gate Assembly.
1. First check the fuel rail pressure.
2. If the fuel pressure is OK, verify the spark plugs are good and there is good spark to the plugs.
3. Next, check for restricted exhaust.
4. If the base engine steps above are OK, replace the Turbocharger/Waste Gate Assembly
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I have a 2022 Ford escape SEL 1.5L.
This code pops up often. The wrench light comes on and off. I've had a few other codes come up in the past. One where the Ford dealership changed the EVAP purge control solenoid. But symptoms remain the same. Another code about the turbo charger came up. My trusted mechanic removed the turbo charger to replace it and found there was nothing wrong with it so he put it back in. Car drove good for about a week when it started hesitating again and losing power. I've had the transmission flushed, and the oil changed.the engine air filter isn't full of dirt but has a little bit in it. The warning light comes on mostly when I'm on the highway going uphill or when I use the cruise control. When I turn off the car and start it again after 10 minutes the warning light is off. I don't trust the dealership mechanics. My trusted mechanic is busy so not always available. Help-
Thanks for all the detail—it really helps. On your 2022 Escape 1.5L, the P0299 (underboost) combined with the wrench light coming on under load (like highway uphill or cruise) definitely points to a boost control issue, even if the turbo itself is mechanically fine.
Here’s what I’d focus on next:
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Check the turbo wastegate actuator and linkage – On these engines, the actuator is electronic. If the rod is sticking or the actuator motor is weak or out of calibration, you’ll get P0299. A lot of shops miss this if it’s not totally failed.
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Boost control solenoid and hoses (if equipped) – Some models still use vacuum-based boost control. A cracked hose, leaky solenoid, or a loose connection will drop boost under load.
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Charge air system leaks – Even a small leak in the intercooler piping or seals (especially near the throttle body or turbo outlet) can cause underboost at highway speeds. Look for oil stains around boots or couplers.
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Software update – Ford has issued TSBs in the past for similar driveability issues on these engines. It might be worth asking a different dealership if your PCM has the latest calibration—even if you don’t trust them for repairs.
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MAF sensor or intake tract – A slightly dirty MAF sensor or minor restriction in the intake can throw off the air/fuel balance and boost control logic. Try gently cleaning the MAF with proper MAF cleaner.
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Data logging – If you or your mechanic has access to a scan tool that can log live boost, throttle, and wastegate position, that can help pinpoint whether it’s a control issue or sensor misread.
Since the turbo itself looked good, my bet is on the wastegate actuator or a small leak/boost control issue that only shows up under load. These are tricky because they often don’t show obvious symptoms until you’re pushing the car.
Let me know if you want help identifying the actuator or locating common leak spots—I can walk you through it.
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