Symptoms
Symptoms of a P2263 engine code may include:
Gasoline engines:
- The engine will be sluggish with poor acceleration
- Boost pressure will drop below normal levels
- Unusual noises may be heard from under the hood
Diesel engines:
- White or black smoke may be visible from the exhaust
- Lack of power and RPM won’t reach upper limits
- The engine may not start
- The engine may race at idle, which could be dangerous
Potential Causes
Experience shows that inspecting the turbocharger will resolve the problem most of the time. Turbochargers have undergone many upgrades, such as ceramic bearings and improved materials to increase their longevity, but they remain the most problematic engine components.
The combination of high temperatures and extremely high RPM is a recipe for shorter lifespan for most engine components.
Over the years, I’ve found that broken hoses or loose clamps causing significant boost leaks trigger this code.
- Turbocharger may have failed
- Boost pressure sensor may have failed
- Wastegate failure
- Clogged catalytic converter
- Faulty Injection Pressure Control (IPC)
- Faulty exhaust backpressure sensor
Repair Procedures
- Inspect all hoses for cracks or loose clamps.
- Inspect the turbo oil supply line. Look for leaks that could slow oil flow to the bearing.
- Inspect the wastegate for proper movement. Ensure it closes completely by detaching the control arm and moving it manually from open to closed.
- Remove the turbo and inspect the bearing seal for leaks. Oil inside the turbo on either side indicates bearing failure. Spin the turbo by hand. It should rotate easily.
- Check the exhaust side of the turbo for coking that prevents the blades from operating properly. In some cases, the turbo can be cleaned.
- Try to move the turbo shaft back and forth. No end play should be present. Look at the sides of the turbo and see if the blades have contacted the housing.
- Replace the turbo if any of the above defects are present.
- On a diesel, visually inspect the injector pressure control sensor. Remove the electrical connector from the sensor. If oil is present, replace the sensor.
- Install the scan tool. Turn on the key and note the IPC voltage. It should be about 0.28 volts. Start the engine. Now the voltage should have increased by 1 volt to 1.38 at idle. The voltage should increase with rising RPM.
- Check the EGR pressure sensor line for corrosion or contamination causing blockage. Check the electrical connector.
- With engine running, check the intake boost pressure sensor for a consistent signal on the scan tool. Inspect the electrical connector to see if it’s loose or if pins are bent.