Meaning of a P Generic OBD2 Code
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The technical definition of the P code is: Turbocharger/Supercharger ‘A’ Overboost Condition
What this P OBD2 trouble code means is your vehicle computer (ECU/PCM/ECM) is detecting dangerously high levels of boost from the turbocharger that could damage the engine. Its usually caused by a stuck or damaged wastegate valve, loose pressure sensor, boost pressure solenoid, or blocked wastegate hose.
This code is present on vehicles equipped with forced-induction, either in the form of a turbocharger or supercharger. This generic OBD2 trouble code can be observed on a variety of import and domestic vehicles equipped with gasoline or diesel engines.
Vehicles with forced-induction are designed to suck in tremendous amounts of air to boost power, torque, and overall engine performance. The boost pressure increase with the speed of the motor or engine rpm. In order to regulate the boost pressure, the engine utilizes a wastegate valve (learn more about how wastegates work). When the wastegate valve is open, it directs the exhaust gasses away from the spinning turbo blades to prevent increasing the boost pressure.
And since the P generic DTC has something to do with an overboosted engine, the root of the problem is most likely traced to a sticking or broken wastegate valve.
Related DTC codes: P, P, and P
Gerard Burke made a good video showing how to tear down a turbo and troubleshoot this code properly!
What are the causes of the P DTC?
A sticky or bad wastegate valve is partly to blame for this code. The problem can also be linked to a broken or damaged wastegate hose, or a faulty boost controller. But in the absence of related trouble codes, the P OBD2 trouble code can usually be remedied by replacing the wastegate valve.
If youve got a diesel engine (and experience with turbos) open up your turbo and check for soot and buildup causing parts not to more freely.
What are the symptoms of a P OBD-II code?
An overboosted motor will produce a slew of symptoms. This includes: a check engine light, a general loss of engine power or poor engine performance, and a knocking sound in the engine. The latter is not a good sign. It means the engine is displaying symptoms of pre-ignition, which causes expensive damage when left unchecked.
- Check engine light displaying P or multiple codes
- General loss of engine power
- Black smoke
In some cases, you will notice signs of engine overheating with the P DTC. Other vehicles may experience rough shifting or a problematic transmission. However, this doesn’t mean there’s a problem with the transmission, but rather the transmission is having a hard time to come up with the inaccurate readings of the overboosted motor.
But on some vehicles (particularly diesel RAM trucks), the check engine light and code are only present when the vehicle is idling. The check engine light will disappear once the vehicle reaches cruising speed. Since the symptoms will vary from mild to wild, it is always best to consult a competent mechanic to have the problem rectified at the soonest possible time.
How much does it cost to fix a P fault?
The actual cost depends on the type of vehicle and the severity of the issue. If the problem is a bad or sticking wastegate valve, expect to spend around $ to $ to fix the problem. The cost will be lower if the issue is a broken or leaking hose. Sometimes the mechanic has the give the turbo a good cleaning and this can cost $$ depending on shop labor.
It also helps to check all hoses from the vacuum pump to the wastegate controller. Repair or replace all faulty or broken hoses if necessary. If your vehicle is still under warranty, head straight to the dealership to make a claim. For older vehicles requiring a new wastegate valve, it is better to replace all related hoses to ensure trouble-free operation.
Ford Escape problems, engine choices, fuel economy
Updated: September 17,The third-gen Ford Escape is a sporty 5-seater compact SUV. It offers a solid road feel and a spacious, nicely-finished interior. The North American Ford Escape offers three different 4-cylinder engines and comes with front- or all-wheel drive.
Ford Escape problems:As of September , we found complaints for the Escape engine on the NHTSA website. The majority of complaints are related to the L engine stalling and overheating. Ford issued the recall 13S12 to address the issue. Given that many L engine problems are caused by overheating, it's important to keep the engine coolant at the proper level and having the vehicle checked out if the overheating warning pops up or if there are any signs of coolant leaks. Some Escape owners reported that the L engine overheats even after the recall, see this threadat the FordEscape.org forum.
There is also a number of complaints about the transmission in the and Escape. One of the possible problems with the transmission is the low fluid level caused by a leaking driver-side front axle seal. According to the bulletin , the bushing and the seal will have to be replaced ($$ repair if out of warranty). The halfshaft might need to be replaced too if worn out, which will cost extra for the part. If the transmission has failed completely, replacing it with a used unit will cost from $1, to $2,
The recall 14S17 addressed the problem with the wiring harness in the L GTDI engine of the Escape that can cause various driveability problems including stalling. Check for recalls at the NHTSA website.
The Ford service bulletin for the Escape with the L engine mentions the problem with the codes P, P, P and/or P The bulletin recommends inspecting the charge air cooler tubes and vacuum lines and if they are OK, replacing the turbocharger wastegate regulating valve solenoid (located near the turbocharger).
According to TSB , a fuel odor in the L EcoBoost engine might be originated from the PCV (crankcase ventilation) hose. If the hose fails the inspection, it will have to be replaced.
A coolant bypass solenoid is common to fail and cause the code P26b7. It's a fairly simple repair. We found several YouTube videoson this problem.
A stuck-open or failed EVAP purge valvecan cause difficulty starting after a fill-up or the Check Engine light with the code P The purge valve is not very expensive, but it takes some work to replace. Read about repair options for Check Engine light problems
Rear shock absorbers can fail, causing a rattling noise from the back when driving over bumps. Replacing both rear shocks will cost from $ to $
The service bulletin SSM for the Escape describes a problem with an AWD system where after extended driving, the vehicle may exhibit a clunk, shuddering or chattering from the rear axle when turning at slow speed. It feels like the rear axle is binding when turning tight corners. According to the bulletin, the solution is to replace the rear drive unit (RDU) viscous coupler clutch with a service kit. We found the service kit (part) is priced from $ to $ online without delivery.
Quite a few owners mention various electrical and Sync problems. Some owners reported that the dealer did a hard reset by disconnecting the battery to repair some of the issues.
An audio system may stop working altogether. If it's not a blown Audio fuse, one of the solution is to replace it with a used audio unit. The warranty is a must in this case so the used unit can be returned if it doesn't work. Replacing an audio unit takes some labor, but it's not extremely difficult; watch these videos. Another option is to visit a local car electronics shop that might offer an aftermarket audio unit that fits for a reasonable price.
EcoBoost is a direct-injected turbocharged engine. As in all direct-injected engines, the carbon buildup on the intake valves can cause misfiring, hesitation and other driveability issues at higher mileage. We found a few YouTube videosexplaining this problem and possible solutions.
Engines:The base FWD Escape models come with an updated naturally-aspirated (non-turbo) hp 4-cylinder L Duratec (iVCT I-4, the 8-th digit of the VIN number is "7"). It's a simple workhorse with a conventional multi-port fuel injection. This engine is more reliable and will cost less to maintain in the long run.
The hp L EcoBoost ("X" on the 8-th digit of the VIN) is an advanced gasoline turbocharged direct-injected (GTDI) motor. It comes standard on the popular SE trim level. As is often the case with smaller turbo engines, it has seen its share of problems in the early model years. For , it has been replaced with the L EcoBoost turbo 4-cylinder engine (The 8-th digit of the VIN: "D"). See the photo.
The optional L-turbo EcoBoost(8-th position of the VIN number is "9") offers horsepower ( hp from ) and 3, lbs towing capacity (when equipped with the Tow Package). It's also a gasoline turbocharged direct-injected (GTDI) 4-cylinder engine. Overall, it's a strong motor, but it needs to be maintained well to last and some repairs at higher mileage can be costly. Read also: Pros and cons of buying a car with Direct Injection.
How can I make my EcoBoost engine last longer?To keep your EcoBoost engine in good shape, use high-quality oil, preferably premium synthetic that falls within Ford requirements, and change it more often. There are two intervals in the maintenance schedule: one for 'normal' and one for 'severe' driving conditions; use the latter. A few extra oil changes are always cheaper than engine repairs. It will also help if you replace the engine air filter more frequently; it's not very expensive. Using Top Tier gasoline can prevent some of the problems with direct fuel injection.
Turbocharged engines don't like overheating. Have the coolant level topped up at every oil change and ask to check for any visible leaks. The worst combination for a small turbo engine is driving uphill (or towing) in hot weather with a full load on low-octane gasoline. This is what the owner's manual for the Ford Escape says on page
For best overall vehicle and engine performance, premium fuel with an octane rating of 91 or higher is recommended. The performance gained by using premium fuel is most noticeable in hot weather as well as other conditions, for example when towing a trailer.
Timing belt or chain:The L EcoBoost and L Duratec engines have a timing chain. The L and the L EcoBoost have a timing belt. According to the owner's manual for the U.S. Escape, the recommended timing belt replacement interval for the L EcoBoost engine is , miles, which is unusually long. In most other cars a timing belt is replaced every K miles or sooner.
Where to download the owner's manual for Ford Escape?You can download the pdf version of the owner's manual from the Ford Owners website.
Fuel Economy:The Escape with the L EcoBoost engine is rated at 22/29 mpgcity/highway, giving it a range of up to miles ( km) on one tank of gas. See ratings of other models in the table.
|Ford Escape EPA fuel economy:||mpg|
|Escape L turbo FWD||23/31||/|
|Escape L turbo FWD||23/32||/|
|Escape L turbo FWD||23/30||/|
|Escape L FWD||22/30||/|
|Escape L turbo AWD||22/29||/|
|, , Escape L turbo FWD||22/29||/|
|Escape L FWD||21/30||/|
|Escape L turbo AWD||22/28||/|
|Escape L FWD||21/29||/|
|Escape L turbo FWD||21/29||/|
|, Escape L turbo AWD||21/28||/|
|Escape L turbo AWD||21/27||/|
|Escape L turbo AWD||20/27||/|
Pros:Sporty looks, solid feel, easy access, competent handling, modern, upscale interior, strong L EcoBoost engine.
Cons:problems in early models, lack of storage places in the front, L engine feels a bit underpowered.
Subaru Outback review
Used Mazda CX-5 review
Chevrolet Equinox review
Honda CR-V review
Nissan Rogue review
Jeep Cherokee review
Overall: At the time we worked on this review, the NHTSA website showed 16 recalls for the Escape, 14 recalls for the Escape and only 5 recalls for the model.
How to inspect a used car - illustrated guide
Why "Check Engine" light comes on?
P FORD Code - Turbocharger/Supercharger 'A' Overboost Condition
Engine-Codes - Ford - P FORD
Repair Importance Level: 3/3
Repair Difficulty Level: 3/3 What is this?
What does this mean?
P FORD code possible causes
- Boost pressure sensor harness is open or shorted
- Boost pressure sensor circuit poor electrical connection
- Faulty boost pressure sensor
- Faulty Turbo/Super Charger
- Engine over temperature
- Ignition misfire exceeds the calibrated threshold
- Faulty Knock sensor (KS)
How is the P FORD code repair?Start by checking the "Possible Causes" listed above. Visually inspect the related wiring harness and connectors. Check for damaged components and look for broken, bent, pushed out, or corroded connector's pins.
What is the cost to diagnose the P FORD code
Labor:The cost to diagnose the P FORD code is hour of labor. The auto repair's diagnosis time and labor rates vary by location, vehicle's make and model, and even your engine type. Most auto repair shops charge between $75 and $ per hour.
When is the P FORD code detected?This diagnostic trouble code (DTC) P will set if the boost pressure sensor signal is above the predicted range.
What are P FORD code possible symptoms?
- Engine Light ON (or Service Engine Soon Warning Light)
What is P FORD code meaning?The boost pressure sensor responds to pressure changes in the intake manifold. This pressure is created by the turbocharger and changes with accelerator pedal position (APP) and engine speed. The engine control module (ECM) uses this information to assist in diagnosis of the barometric pressure (BARO) sensor and to provide engine overboost protection. The boost pressure sensor has a 5-volt reference circuit, a low reference circuit, and a signal circuit. The engine control module (ECM) supplies 5 volts to the boost pressure sensor on the 5-volt reference 2 circuit, and provides a ground on a low reference circuit. The boost pressure sensor provides a signal to the ECM on a signal circuit relative to the pressure changes. The ECM monitors the boost pressure sensor signal for voltage outside of the normal range. The ECM calculates a predicted value for the boost pressure sensor. The ECM then compares the predicted value to the actual signal.
Need more information with the P FORD code?Need more information on how to fix the P FORD code?
Get Access to Factory Service Manuals
P FORD code information for specific Ford models
1=Low 2=Medium 3=High What is this?Repair Difficulty Level:3
1=Easy 2=Moderate 3=Hard What is this?
Browse Codes for Specific Model-Year
P is a diagnostic trouble code (DTC) for "Engine Overboost Condition". This can happen for multiple reasons and a mechanic needs to diagnose the specific cause for this code to be triggered in your situation. Our certified mobile mechanics can come to your home or office to perform theCheck Engine Light diagnosticfor $ Once we are able to diagnose the problem, you will be provided with an upfront quote for the recommended fix and receive $ off as a credit towards the repair. All our repairs are backed by our month / 12,mile warranty.
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P code definition
Engine Overboost Condition
What the P code means
P is a generic OBD-II code that is triggered when the Engine Control Module (ECM) detects that the intake boost pressure sensor input signals intake pressure above the maximum specified pressure by 4 psi for more than 5 seconds.
What causes the P code?
The turbocharger/supercharger wastegate is damaged or sticking
The wastegate control valve solenoid is sticking
The wastegate control hose is getting blocked and the boost pressure cannot be relieved quickly enough
What are the symptoms of the P code?
The Check Engine Light will be illuminated and the P code will be set in ECM memory.
The engine overboost condition may cause gaskets or seals to the intake or heads to fail.
The engine may run normally until the excessive overboost pressure blows out a gasket or seal.
How does a mechanic diagnose the P code?
Scans codes and documents the freeze frame data in order to verify the problem
Clears the codes to verify whether the concern comes back
Checks the operation of the boost pressure solenoid for proper operation of the wastegate
Checks the wastegate for sticking or binding
Check the wastegate relief hose for kinks, blockage or damages
Common mistakes when diagnosing the P code
Follow these simple guidelines to prevent misdiagnosis:
Check the boost pressure sensor hose for obstructions or kinks
Verify that the overboost pressure condition is not from boost pressure sensor incorrect input voltage
How serious is the P code?
- The boost pressure in the intake can give you a lot of power, but an overboost condition when the engine is not designed to handle it may cause catastrophic engine failure, like a blown engine or blown head gaskets.
What repairs can fix the P code?
Replacing the boost sensor if it is not giving the correct input pressure reading to the ECM
Replacing the wastegate control solenoid if it is sticking
Replacing the wastegate valve if it is sticking or binding
Repairing or replacing wastegate hoses due to kinks or blockage of the wastegate lines
Code P is triggered by the intake boost sensor indicating an overboost condition and the most common failure is the wastegate binding or sticking intermittently.
Need help with a P code?
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Ford code escape p0234
Error Code P Turbocharger / Supercharger “A” Overboost Condition Code
Error Code P is defined as Turbocharger / Supercharger “A” Overboost Condition Code.
This indicates the PCM (powertrain control module, also known as ECM or engine control module) has detected that the intake boost pressure sensor input signal receives pressure more than the maximum specified input pressure by 4 psi for over 5 seconds.
It’s a generic trouble code, meaning it applies to all vehicles equipped with OBD-II, particularly vehicles made in up to present. Specifications on the definition, troubleshooting, and repairs of course, vary from one make and/or model to another.
As said earlier, Error Code P suggests the PCM senses a dangerously high boost pressure from the engine’s forced induction system. Excess boost level can compromise the engine’s structural integrity.
The Turbo Charging system is equipped with a Boost Pressure Sensor, which runs to continually send data back to the PCM. This provides the feedback loop between the requested level of turbo charger boost of the PCM and the actual level of the Turbo Charger Boost. If the pressure reading goes way over the specified pressure, or when the Knock Sensors signal that the engine is knocking, it will trigger the Error Code and activate the Check Engine light.
The most common tell-tale sign is of course, the activation of the Check Engine light. In terms of symptoms, that actually depends on the cause of the overboost condition. Some of the most common symptoms are:
- Loss of power or no turbo charger boost
- Engine overheating
- Harsh transmission or transmission overheating
- Engine knocking or pinging especially on acceleration
- Ignition misfiring
In some cases, the engine may run normally until the excessive overboost blows out a gasket or seal. In relation, the engine overboost condition may cause gasket or seals to the heads or intake to fail.
There are many reasons for this error code to appear, and as said earlier, the type and severity of the symptoms depends on the nature of the cause of the overboost condition. Some of the most common possible causes of Error Code P are:
- Damaged or sticking turbo charger or supercharger wastegate
- Sticking wastegate control valve solenoid
- Blocked wastegate control hose, keeping boost pressure from being relived quickly enough
- Defective turbo charger boost sensor or actuator
- Corroded or faulty turbo charger boost sensor connectors or wirings
- Defective knock sensor(s), connections or wirings
How to Check
As with other engine trouble codes, troubleshooting for Error Code P starts with scanning and documenting the freeze frame data to verify the problem.
Then, the codes shall be cleared to verify whether the problem comes back.
This is where you can check the operation of the boost pressure solenoid for proper operation of wastegate.
Check the wastegate if it’s binding or sticking.
Lastly, check the relief hose of the wastegate and look for signs of blockages, damages or kinks.
How to Fix
The most common fix for this Error Code is to replace the defective boost sensor. Defective meaning, it’s not providing the right pressure reading to the PCM.
Sticking wastegate must also be replaced.
Replacing a binding or sticking wastegate valve.
Repair of replacement of damaged wastegate lines caused by kinks or blockages.
Again, this code is triggered by the intake boost sensor, which indicates an overboost condition. Its most common failure is wastegate intermittently binding or sticking.
The pressure it causes can give the engine a lot of power; however, an overboost condition may cause engine failure, which can be a pretty serious condition, especially for engines not designed for such high pressure intake. This error code can lead to blown engine or blown head gasket.
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