P2261 OBD-II Trouble Code: Turbo/Super Charger Bypass Valve - Mechanical

Our certified mechanics come to you · Get a fair and transparent estimate upfront

Red-stars EXCELLENT RATING ON

Cost of diagnosing the P2261 code

P2261 is a diagnostic trouble code (DTC) for "Turbo/Super Charger Bypass Valve - Mechanical". 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 the Check Engine Light diagnostic. Once we are able to diagnose the problem, you will be provided with an upfront quote for the recommended fix and receive $20.00 off as a credit towards the repair. All our repairs are backed by our 12-month / 12,000-mile warranty.

Cars Estimate Credit towards follow-up repair Earliest Availability
Ford$20.00
Toyota$20.00
BMW$20.00
SCHEDULE P2261 DIAGNOSTIC Get a fair and transparent estimate upfront

P2261 code definition

Turbo/Super Charger Bypass Valve - Mechanical

What the P2261 code means

The P2261 diagnostic trouble code is an indication that the turbo/super charger bypass valve mechanical control circuit is giving the Powertrain Control Module (PCM) a reading that is abnormal.

The purpose of the turbocharger is to force air into the engine in order to increase horsepower. This is accomplished when the turbocharger moves impellers that are located in two separate housing chambers.

The impeller in the first chamber turns as engine exhaust pressure is forced through it. The impeller in the first chamber then turns the impeller in the second chamber. The second chamber impeller picks up cooler air from intercoolers and the turbocharger intake system and forces dense air into the engine.

Fuel that is dense boosts increased horsepower, and the rise of revolutions per minute (RPM). Boost pressure is achieved with high RPMs, and the engine cannot operate properly if boost pressure is excessively high or low (boost pressure specifications are determined by the manufacturer and programmed into the PCM).

When the boost pressure is higher or lower than the predetermined specifications, the PCM will store the P2261 trouble code, and the Check Engine Light will come on.

What causes the P2261 code?

  • Intake manifold vacuum leak
  • Dirty air cleaner
  • Wastegate that is stuck open
  • Wastegate that is stuck closed
  • Faulty intercooler
  • Bolts between the turbocharger and exhaust manifold that are loose
  • Faulty boost sensor
  • Boost sensor wiring that is shorted or open
  • Boost sensor reference circuit connectors that are loose, disconnected, or corroded
  • Turbo failure caused by internal oil leaks and/or oil supply restrictions

What are the symptoms of the P2261 code?

  • Difficulty with acceleration
  • Rattling sound coming from the turbocharger and/or turbo pipes
  • Smoke coming from the exhaust
  • High engine temperatures
  • High transmission temperatures
  • Hissing sound coming from the turbocharger wastegate and/or turbocharger hoses
  • Loss of engine performance
  • Unusual boost pressure levels
  • Fouled spark plug
  • Cylinder combustion
  • Other diagnostic trouble codes stored along with P2261, such as boost codes, engine misfire codes, or knock sensor codes

How does a mechanic diagnose the P2261 code?

  • Inspects wiring and connectors for shorts, burns, and corrosion

  • Clears the codes and runs the engine (if the P2261 code does not come back, it is an indication that an intermittent problem exists, which cannot always be diagnosed immediately)

  • Makes sure there are no misfire conditions

  • Makes sure that the turbo hose clamps are tight

  • Makes sure that the turbo intake hoses and intercooler hoses are free from leaks and cracks

  • Makes sure that the air intake hoses are tight and not damaged in any way.

  • Makes sure that the vacuum lines are not cracked, torn, or disconnected.

  • While running the engine, gets the RPMs up to 5,000 and releases the throttle (uses a boost gauge to observe boost pressure levels)

If boost pressure levels are above 19 lbs., this is an indication that the westgate is faulty.

If boost pressure levels fall below 14 lbs., this is an indication that there is a problem with the turbocharger or exhaust.

  • Uses a vacuum pump to see if the wastegate is functioning properly

If an extreme drop in boost pressure is observed, this is an indication that the wastegate is not closing completely.

If low boost pressure is observed, this is an indication that the wastegate is not opening completely.

  • Inspects the inside of the turbo outlet hose for standing oil

  • Inspects the impeller for damage and whether the impeller is making contact with the inner housing and checks to make sure that there are no loose bearings (if any of these conditions exist, it is an indication that the turbocharger is defective)

  • Checks the voltage and resistance of the turbocharger boost sensor electrical circuitry and connectors (if the voltage and resistance readings do not coincide with the specifications that have been predetermined by the manufacturer, the circuitry will need to be replaced or repaired, as necessary)

Common mistakes when diagnosing the P2261 code

  • One common mistake when diagnosing the P2261 trouble code is not inspecting the turbocharger oil system to determine whether it is necessary to clear debris and/or obstructions.

  • Another mistake that is commonly made is replacing the turbocharger before making sure the wastegate and circuitry is operating properly.

How serious is the P2261 code?

The symptoms of the P2261 diagnostic trouble code will affect the overall engine performance of the vehicle. Some of these symptoms include:

  • a lack of power
  • poor acceleration
  • spark plugs fouling out

These symptoms will make the vehicle difficult to operate. For this reason, the P2261 trouble code is considered a serious one and should be diagnosed and repaired as soon as possible.

What repairs can fix the P2261 code?

  • Replacing damaged vacuum line
  • Replacing intake manifold gasket
  • Replacing air filter
  • Replacing wastegate
  • Replacing intercooler
  • Replacing or tightening bolts between the turbocharger and exhaust manifold
  • Replacing boost sensor
  • Repairing or replacing boost sensor wiring
  • Repairing or replacing boost sensor reference circuit connectors
  • Replacing turbo or oil lines leading to the turbo that are restricted

Additional comments for consideration regarding the P2261 code

There are a lot of components in the turbo system that help control turbo boost. It is important to check all of the turbo system components while diagnosing this trouble code. It is also important to mindful that loose or broken vacuum hoses have the potential to cause the P2261 diagnostic trouble code to be stored by the Powertrain Control Module (PCM).

*Need help with a P2261 code? *

YourMechanic offers certified mechanics who will come to your home or office to diagnose and repair your vehicle. Get a quote and book an appointment online or speak to a service advisor at 1-800-701-6230.

P2261
trouble codes
Check Engine Light

No more waiting rooms! Our mechanics will come to you to diagnose and fix the P2261 code.

SCHEDULE P2261 DIAGNOSTIC
Get a $20 credit for the follow-up repair

Recent Check Engine Light is on Inspection reviews

Excellent Rating


YourMechanic Check Engine Light is on Inspection Service

Average Rating

4.8/5

Number of Reviews

5,606

Rating Summary
5,180
205
50
34
137
5,180
205
50
34
137

James

40 years of experience
34 reviews
James
40 years of experience
Ford F-150 - Check Engine Light is on - Chagrin Falls, Ohio
Jim was great! Arrived on time, quickly diagnosed the problem and recommended further work. Very helpful, I’ll use Jim again and recommend to family and friends.

Roberto

11 years of experience
137 reviews
Roberto
11 years of experience
Nissan Titan - Check Engine Light is on - Spring, Texas
Roberto was very thorough with his explanation of repairs needed. I will contact your mechanic for future repairs.

Matthew

32 years of experience
839 reviews
Matthew
32 years of experience
Kia Optima - Check Engine Light is on - Yorktown, Virginia
Matthew Lerman was God Sent, and thank God for Your Mechanic,, you have my Vote Looking , Looking forward for more Business. Very Honest Guy

Robert

20 years of experience
38 reviews
Robert
20 years of experience
Honda Accord - Check Engine Light is on - Brentwood, California
He came earlier than on time and got the job done faster than I seen anyone else have . Solid honest hard working dude.


Related questions

Turbo wastegate stuck closed. Need solution.

Hello. P2261 is the code for an issue with the vehicle's turbocharger bypass valve, also known as the wastegate. If the computer detects an issue with the wastegate circuit or signal it will activate the Check Engine Light in order...

More related articles

P0125 OBD-II Trouble Code: Insufficient Coolant Temperature for Closed Loop Fuel Control
P0125 code definition Insufficient Coolant Temperature For Closed Loop Fuel Control What the P0125 code means P0125 is the OBD-II generic...
P3418 OBD-II Trouble Code: Cylinder 3 Deactivation/Intake Valve Control Performance
What What the P3418 code means This code indicates that there is a problem with your intake valve on cylinder number 3. Your vehicle’s control module detects that the measured values from the TP sensor, MAP sensor, and MAF sensor...
P0625 OBD-II Trouble Code: Generator Field/F Terminal Circuit Low
P0625 means there is an issue with the generator field control circuit often due too shorted connectors or a defective CAN bus.

How can we help?

Our service team is available 7 days a week, Monday - Friday from 6 AM to 5 PM PST, Saturday - Sunday 7 AM - 4 PM PST.

1 (855) 347-2779 · hi@yourmechanic.com