P1159 KIA Possible Causes
- Faulty Variable Intake Motor
- Variable Intake Motor harness is open or shorted
- Variable Intake Motor circuit poor electrical connection
How do I fix code P1159 KIACheck the "Possible Causes" listed above. Visually inspect the related wiring harness and connectors. Check for damaged components and look for broken, bent, pushed out, or corroded connector's pins.
Cost of diagnosing the P1159 KIA code
Labor: 1.0The cost of diagnosing the P1159 KIA code is 1.0 hour of labor. The auto repair labor rates vary widely across the country, and even within the same city. Most auto repairs shops charge between $75 and $150 per hour.
- Engine Light ON (or Service Engine Soon Warning Light)
P1159 KIA MeaningVariable Intake System (VIS) 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.
P1159 KIA More InformationNeed more information on how to fix the P1159 KIA code?
Get Access to Factory Service Manuals