Diagnostic Aids

• Inspect the harness of the MAF sensor 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
• Inspect for any contamination or debris on the sensing elements of the MAF sensor.
• A wide open throttle acceleration from a stop should cause the MAF sensor parameter on the scan tool to increase rapidly. This increase should be from 7-12 g/s at idle to 200 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 high resistance of 15 ohms or more on the ignition 1 voltage circuit may cause this DTC to set. A high resistance may cause a driveability concern before this DTC sets.
• A high resistance of 15 ohms or more on the ground circuit of the MAF sensor may cause this DTC to set. A high resistance may cause a driveability concern before this DTC sets.

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