Probable Causes:

• A/C Switch or Switch Circuit
• A/C Amplifier
• Accelerator Pedal or Cable
• ECM
• Neutral/Start Switch or Switch Circuit
• Throttle Position Sensor or Sensor Circuit

To check throttle position sensor or circuit, see CODE 41/TEST NO. 6 - TPS SIGNAL procedures in this article. To check A/C switch signal, use the following table.