Code 49: Airflow Sensor

Code 49 indicates use of an improper airflow sensor. Symptoms include the following:

• Rough or erratic idle.
• Failure of engine to start.

If a code 49 is displayed, check specifications of airflow sensor and ECU. Replace the airflow sensor or ECU with the correct type as follows:

• Automatic Transmission - Hot film type airflow sensor (JECS).
• Manual Transmission - Hot wire type airflow sensor (Hitachi).