P1183 KIA Possible Causes
- Rail pressure regulator circuit.
- Rail pressure regulator component
How to Fix P1183 KIA Code?
Start by checking the “possible causes” listed above. Visually inspect the corresponding wiring harness and connectors. Look for damaged components and check for broken, bent, pushed out, or corroded connector pins.
Possible Symptoms
- Engine light on (or engine service warning light soon)
P1183 KIA Meaning
The rail pressure regulator, which is installed in the high-pressure pump, controls the rail pressure by regulating the amount of fuel supplied to the common rail. The ECM performs a service control of the rail pressure regulator to maintain the rail pressure at the target rail pressure based on the engine’s current load condition.
As the rail pressure regulator service increases, more fuel flows into the common rail, so the rail pressure increases.
When the rail pressure regulator operation stops due to the rail pressure regulator power supply being cut off, the maximum amount of fuel flows to the common rail when the passage inside the regulator is fully open.