DTC Troubleshooting: P0102 (50)
DTC P0102:
 MAF Sensor Circuit Low Voltage
NOTE: Before you troubleshoot, record all freeze data and any on-board snapshot, and review the general troubleshooting information.
  1. Turn the ignition switch to ON (II), and wait 2 seconds.
  1. Check the MAF SENSOR in the DATA LIST with the HDS.
Is about 0 gm/s, or 0.1 V or less indicated?
YES -
Go to Step 3 .
NO -
Intermittent failure, the system is OK at this time. Check for poor connections or loose terminals at the MAF sensor and the ECM/PCM.■
  1. Turn the ignition switch to LOCK (0).
  1. Disconnect the MAF sensor/IAT sensor 5P connector.
  1. Turn the ignition switch to ON (II).
  1. Measure the voltage between MAF sensor/IAT sensor 5P connector terminal No. 3 and body ground.
Is there battery voltage?
YES -
Go to Step 7 .
NO -
Repair open in the wire between PGM-FI main relay 1 and the MAF sensor, then go to Step 19 .
  1. Turn the ignition switch to LOCK (0).