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Home >> Hyundai >> 2018 >> Kona Limited, FWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 151 (Engine Control System Diagnosis - 2.0L (3 Of 3)) >> DTC P2188-00: System Too Rich At Idle (Bank 1) >> DTC Information And Inspection >> Monitor Actuation Test

Monitor Actuation Test

WARNING: This page is about a different car, the 2021 Hyundai Kona. However, it is still accessible from the selected car via links, so may be relevant.
NOTE: The main purpose of this test is to identify potential engine mechanical condition problems and fuel and ignition systems problems that are not common to all cylinders. For best results, perform this test while maintaining as steady an RPM reading as possible.
CAUTION: Before beginning tests; set the parking brake, place gear selector in P or N and block drive wheels for safety.
  1. Warm up the engine to normal operating temperature and let it idle.
  2. Install GDS and select "INJECTOR #1" parameter on the Actuation Test mode displayed in image.
  3. Monitor engine RPM and shut off the injector #1 by pressing "START" key
  4. Repeat procedure on all injectors and record the engine RPM.

    Specification:  All cylinders should show an even RPM drop.

  5. Was each cylinder's RPM drop within the same value?

    YES 

    • Go to next step below

    NO 

    • Cylinders with the least amount of RPM drop are not contributing their share of power. Go to FUEL LINE PRESSURE INSPECTION  followed by Fuel Pressure Hold Inspection procedure below.
    NOTE: If the RPM loss between cylinders is quite large (200 RPM or more) and engine has high mileage, there is possibility of engine wear. Perform compression test with pressure gauge to check the engine wear
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