Symptom Chart

WARNING: This page is about a different variant/trim than selected.

SYMPTOM	POSSIBLE CAUSES	ACTION
Poor performance	Low/Contaminated fuel Restricted intake air system General engine condition Powertrain control module failure	Check the fuel level and condition. Draw off approximately 1 ltr (2.11 pints) of fuel and allow to stand for 1 minute. Check to make sure there is no separation of the fuel indicating water or other liquid in the fuel. Check the intake air system for restriction. Check the engine condition, compressions, etc if there are indications of a mechanical fault. Check for DTC s indicating a module fault. Refer to the warranty policy and procedures information if a powertrain control module is at fault
No boost	Electrical connections and harnesses Restricted intake air system Charge air cooler restricted/leaking Turbocharger actuator failure(s) Turbocharger failure(s) Powertrain control module failure	Check the electrical connections and harnesses. Check the intake air system for restriction/leakage. Check the turbocharger actuators and circuits. Refer to the electrical guides. Check the turbochargers for wear. Disconnect the turbocharger intake and outlet pipework and turn the turbochargers by hand. Any roughness indicates a fault. Check any up and down movement in the turbocharger shafts. Excessive movement indicates a fault. If in doubt, compare the unit with a new turbocharger. Check for DTC s indicating an actuator or module fault. Refer to the warranty policy and procedures information if a powertrain control module is at fault
No boost/excessive noise	Turbocharger failure(s)	Disconnect the turbocharger intake and outlet pipework and turn the turbochargers by hand. Any roughness indicates a fault. Check any up and down movement in the turbocharger shafts. Excessive movement indicates a fault. If in doubt, compare the unit with a new turbocharger.
Oil on the turbocharger assembly	Oil leak from connection(s) to the turbocharger assembly Oil leak from engine above the turbocharger Slight oil trace from the joint between turbocharger assembly and exhaust downpipe (RH Secondary Turbocharger)	NOTE: DO NOT replace the turbocharger for an oil leak issue until investigations have been made to establish the source of the oil leak. In most cases it is NOT the turbocharger that is at fault. Clean all oil residue from the turbocharger assembly and check for leaks from the oil feed and drain joints. Replace copper washers and gaskets as necessary. Refer to: RIGHT TURBOCHARGER Removal steps 9, 14 and installation steps 6, 10. Check and top up the engine oil as necessary. Perform a road test and check no oil leaks are evident Clean all oil residue from the turbocharger assembly. Check for leaks from the inlet manifold/camshaft covers. Inspect the front and rear joints between the Inlet manifold/camshaft covers and cylinder heads. If a leak is evident, install a new camshaft cover gasket to the leaking side only as necessary Refer to: RIGHT VALVE COVER and LEFT VALVE COVER Check and top up the engine oil as necessary. Perform a road test and check no oil leaks are evident NOTE: DO NOT replace the turbocharger assembly for this possible cause, unless there are DTC s set and the vehicle has driveability issues. A small trace of oil is normal if the vehicle has light use or is used on short journeys. Clean all oil residue from the turbocharger assembly. Check and top up the engine oil as necessary. Perform a road test and check for traces of oil. If no oil traces are evident, return the vehicle to the customer