Sonata GLS V6-2.7L (2002)
TROUBLESHOOTING HINTS
1. If the engine stalls occasionally, start the engine and shake the MAF sensor harness. If the engine stalls, check for poor contact at the MAF sensor
connector.
2. If the MAF sensor output voltage is other than 0 when the ignition switch is turned on (do not start the engine). Check for a faulty MAF sensor or
ECM.
3. If the engine can be idle even if the MAF sensor output voltage is out of specification, check for the following conditions;
-
Disturbed air flow to the MAF sensor, check for disconnected air duct, and clogged air cleaner filter.
-
Poor combustion in the cylinder, check for faulty ignition plug, ignition coil, injector, and incorrect comparison
4. Check the mounting direction of AFS.
NOTE: When the vehicle is new [within initial operation of about 500 km (300 miles)], the mass air flow sensor air quantity will be about 10%
higher.
