Error Code P2263 is defined as Turbo/Supercharger Boost System Performance, which is a mechanical fault. This indicates a problem in the performance of the turbo/supercharger boost system.

Definition

The turbo/supercharger creates its boost by using exhaust pressure and air/fuel mixture. Vehicle manufacturers set a specific range in which the exhaust pressure is expected to stay. When and if the exhaust pressure falls below its expected pre-determined range, the PCM (powertrain control module, also known as ECM engine control module in other vehicle makes) stores the Error Code P2263, and simultaneously activates the Check Engine light.

Other closely related codes include:

  • P0039: Turbo/Supercharger Bypass Valve Ctrl Circ Range/Perf
  • P003A: Turbocharger/Supercharger Boost Ctrl “A” Pos Exceeded Learning Limit
  • P003B: Turbocharger/Supercharger Boost Ctrl “B” Pos Exceeded Learning Limit
  • P0045: Turbocharger/Supercharger Boost Control “A” Circuit/Open
  • P0046: Turbocharger/Supercharger Boost Control “A” Circuit Range/Perf
  • P0047: Turbocharger/Supercharger Boost Control “A” Circuit Low
  • P0048: Turbocharger/Supercharger Boost Control “A” Circuit High
  • P0049: Turbocharger/Supercharger Turbine Overspeed
  • P004A: Turbocharger/Supercharger Boost Control “B” Circuit/Open
  • P004B: Turbocharger/Supercharger Boost Control “B” Circuit Range/Perf
  • P004C: Turbocharger/Supercharger Boost Control “B” Circuit Low
  • P004D: Turbocharger/Supercharger Boost Control “B” Circuit High
  • P004E: Turbocharger/Supercharger Boost Control “A” Circuit Intermittent/Erratic
  • P004F: Turbocharger/Supercharger Boost Control “B” Circuit Intermittent/Erratic
  • P006E: Turbocharger/Supercharger Boost Control “A” Supply Voltage Circuit Low
  • P006F: Turbocharger/Supercharger Boost Control “B” Supply Voltage Circuit High

Common Symptoms

Aside from the activation of the Check Engine light and registry of code to the vehicle’s memory, this code also shows drivability issues, such as:

  • Poor acceleration
  • Low engine power
  • Low boost pressure
  • Stalling or shut off during operation
  • Strange noises coming from the engine
  • Strange noises coming off the turbocharger

Possible Causes

This code can be caused by multiple of factors, such as:

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  • Defective turbocharger
  • Defective boost pressure sensor
  • Defective exhaust back pressure sensor
  • Defective wastegate
  • Defective injection pressure control
  • Broken or loose vacuum lines
  • Leak in oil supply lines

How to Check

To diagnose this code, technicians use an OBD-II scanner to collect the required info of all the present diagnostic codes stored in the PCM.

Then, they will proceed on checking for signs of damage or loose connections in the turbocharger/supercharger boost system hoses.

Next, they check for leaks in the turbocharger/supercharger boost system oil supply line.

Then, they open and close the wastegate manually to make sure it is working properly.

Next, they check the boost sensor, injection pressure control, as well as the exhaust pressure sensor,  make sure they’re all working properly as well.

Then, they will remove the turbocharger to check it thoroughly. They will remove the turbocharger and check for oil. If there is oil, that means the turbocharger bearing is defective.

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Next, they check the shaft of the turbo for end play. If the turbo shaft is worn out or too loose, that means the turbocharger must be replaced.

Lastly, they check the turbocharger on the side where the exhaust is located and look for signs of obstructions that may be causing the vanes to malfunction. If there are visible obstructions, the turbocharger must be cleaned or replaced.

How to Fix

Fixing this code is quite simple and straightforward. But of course, successful repair comes from thorough diagnosis. Some of the common fixes for this code include:

  • Replacement of defective turbocharger
  • Replacement of defective boost pressure sensor
  • Replacement of defective injection pressure control
  • Replacement of exhaust back pressure sensor
  • Replacement of defective wastegate
  • Repair or replacement of loose vacuum lines or leaks
  • Repair or replacement of damaged or leaking oil supply lines

Before you replace the turbocharger, it must be thoroughly checked for leaks and clogs. Not checking turbocharger carefully usually leads to misdiagnosis.

Also when checking, it is important to inspect the vacuum lines and look for signs of breakage, leaks, or loose connections before replacing the turbocharger. The same goes with the oil supply lines.

Since Error Code P2263 causes the vehicle to stall or even shut off during operation, this issue is considered serious, as the vehicle will suffer a limited operation. Thus, it should be diagnosed and fixed as soon as possible.