Diagnostic Aids

Inspect for the following conditions:

• An incorrectly routed harness-Inspect the harness of the MAF sensor in order to verify that it is not routed too close to the following components:
  • The secondary ignition wires or coils
  • Any solenoids
  • Any relays
  • Any motors
  • Any aftermarket accessories - Refer to Checking Aftermarket Accessories .
• A low minimum air rate through the sensor bore may cause this DTC to set at idle or during deceleration. Inspect for any vacuum leaks downstream of the MAF sensor.
• A wide open throttle (WOT) acceleration from a stop should cause the MAF Sensor g/s parameter on the scan tool to increase rapidly. This increase should be from 6-12 g/s at idle to 230 g/s or more at the time of the 1-2 shift. If the increase is not observed, inspect for a restriction in the induction system or the exhaust system.
• A resistance of 15 ohms or more on the ground circuit or the ignition 1 circuit of the MAF sensor can cause this DTC to set.

If the condition is intermittent, refer to Testing for Intermittent Conditions and Poor Connections .