Question about Hyundai XG350
P1159 - Variable intake motor malfunction.
VIS(Variable Intake System) is used to increase torque at lower rpm and increase horsepower at higher rpm. Sigma 3.5l engine has two intake runners for each cylinder. The primary intake runner is a long, thin tube in which the intake air passes through. This allows a strong stream of air to blast into the cylinder, helping low-end torque. The secondary intake runner is a short, fat tube. This allows a large volume of air to be sucked into the engine, increasing high-end horsepower. At lower rpm range, the engine does not provide enough suction into the cylinders, starving the engine of much needed oxygen. The skinny tube helps blast the air into the cylinder for more oxygen. At higher rpm, the engine has plenty of suction but the intake runner is too small to provide the oxygen it needs.
This has a electric motor on it Variable Intake Motor and it sounds like it went bad or the connection to the motor is loose try un plugging it and plugging it back in.If the code does not go away the Variable Intake Motor will need to be replaced.
P0320 - Ignition failure sensor malfunction
This usually refers to the faulty crankshaft position sensor.You could take a look at a nice guide :-
Let me know,if needed further assistance.
Hope i helped you.
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Posted on Oct 03, 2010
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Posted on Jan 02, 2017
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