Safety Warning

DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.

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HOMESERVICE MANUALSHYUNDAI2009ENTOURAGE LIMITEDREPAIR AND DIAGNOSISENGINE PERFORMANCESYSTEMDTC TROUBLESHOOTING PROCEDURES (1 OF 2)DTC P0102 MASS OR VOLUME AIR FLOW CIRCUIT LOW INPUTCOMPONENT INSPECTION

2009 Hyundai Entourage Limited

Component Inspection

2009 Hyundai Entourage LimitedSECTION Component Inspection

Visual Inspection
1. Check that MAFS is damaged, contaminated or deformed.
2. Has a problem been found?
  YES
  - Repair or replace as necessary and then go to "VERIFICATION OF VEHICLE REPAIR " procedure.
  NO
  - Go to " 2Check MAFS" as follows
Check MAFS
1. IG "OFF" and install a scantool
2. ENG "ON" and monitor "MAFS" data on the service data.
3. Monitor signal waveform at terminal 1 of MAFS with scantool.
  Specification: Signal waveform will be displayed as follows. (Be aware that the signal of MAFS is not voltage display but frequency display.)
  
  Fig 1: Signal Waveform Graph
  Courtesy of HYUNDAI MOTOR CO.
4. Are both service data and signal wave form displayed correctly?
  YES
  - Substitute with a known - good PCM and check for proper operation. If the problem is corrected, replace PCM and go to "VERIFICATION OF VEHICLE REPAIR " procedure.
  NOTE: There is a memory reset function on scantool that can erase optional parts automatically detected and memorized by PCM.
  Before or after testing PCM on the vehicle, use this function to reuse the PCM on the others
  
  NO
  - Substitute with a known - good MAFS and check for proper operation. If the problem is corrected, replace MAFS and go to "VERIFICATION OF VEHICLE REPAIR " procedure.

RENDER: 1.0x

NO RELATED

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

• You smell fuel, burning insulation, or see smoke.
• Brakes feel soft, pull hard to one side, or make grinding noises.
• The engine overheats, stalls repeatedly, or misfires under load.
• You are missing required tools, torque specs, or safe lifting equipment.
• You are not confident in the next step or safety outcome.