Opus IVS master technicians recently supported a customer with a VW experiencing turbo-underboost

All Opus IVS mechanical repair solutions come with live repair guidance from IVS 360 OE-brand-specific master technicians.
Opus IVS says its IVS 360 support is a unique offering in the automotive aftermarket, offering live repair guidance worldwide to help workshops and technicians fix complex vehicles safely and fast.
Using the DrivePro’s market leading diagnostic software and extensive product knowledge, the IVS 360 team identifies the cause and steps needed to fix vehicle faults.
Opus IVS says IVS 360 provides technicians with the confidence to repair the most complex vehicles fast with live repair guidance from OE brand-specific master technicians.
Opus IVS’ experts access remotely in real time directly to vehicle communication systems to diagnose, program and calibrate vehicles. Opus IVS says this eliminates the uncertainty for workshops, giving them the confidence to get the most complex vehicles back on the road safely and fast. Customers can quickly and easily request support from the IVS 360 team directly from their DrivePro device.
The IVS 360 team recently supported a customer with an VW that was lacking in power and failed to attain top speed, identifying the cause and the steps needed to fix the problem as follows.

Make: VW, Audi, Seat, Skoda Models: all vehicles with variable vane turbochargers.

Symptoms: Vehicle lacks power and vehicle does not attain top speed

Fault Code: P0299 = Turbo under-boost

Repairing the fault: the following steps were provided to the customer:

• Connect your Opus IVS device and check for any engine or engine management faults, especially any fault code indicating turbo under-boost.
• If a fault code is present, connect a mityvac to the turbo waste gate, pull a vacuum and see if it holds.
• If vacuum does not hold, the diaphragm has failed. Note that in most common-rail diesels, this diaphragm can be replaced separately.
• If vacuum holds, then leave vacuum on and drive the vehicle in this state. Does the vehicle drive okay?
• If the vehicle now drives okay, this indicates that all the turbocharger mechanicals are okay, and the fault lies with the turbo control.
• Inspect the vacuum pipes and hoses for deterioration or disconnection to and from the control solenoid (N75). Check for the correct operation of the N75 valve. 
• If the fault is still present, this indicates a turbo mechanical problem because turbo control has been eliminated as a cause of the problem. There could be a problem with either:
– The turbo itself
– Blocked exhaust
– Blocked or leaking intake
• To rule out a blocked or leaking intake:
– If you have a common rail engine, contact our IVS 360 Team to check the system under boost.
– If you have a PD diesel engine and wish to test the intake boost system, you can do so with the engine on idle. Use your Opus IVS device: ENGINE ELECTRONICS >> MANUAL FUNCTIONS >> BASIC SETTINGS >> CHANNEL 11 >> TOGGLE BASIC SETTINGS
– This will boost the intake in steps so that you can check the system without driving the vehicle. You can also check the boost live data in measuring groups. This shows you the actual and specified boost pressure. Driving under load, the values should match, as you only get boost while driving.
• A blocked exhaust normally shows up in conjunction with a DPF fault or a warning light. Rule this out by reading the back-pressure and/or venting the exhaust system.
• If the checks carried out have allowed you to rule out the above, then the turbo itself will need to be checked for internal damage. Repair or replace as required.

IVS 360 support offers live repair guidance and remote programming services to help you fix complex vehicles safely and fast. All Opus IVS mechanical repair solutions come with live repair guidance from IVS 360 OEM brand-specific master technicians.

For more information, visit www.opusivs-au.com or contact 03 8561 7600 or sales-au@opusivs.com