DC6 - Cont. Memory and KOER DTC 0102: Check MAF Signal to PCM

Diagnostic Trouble Code (DTC) 0102 indicates the MAF signal went below 2.55 gm/sec. (0.39 volts) sometime during normal engine operation (Continuous) or during Key On Engine Running (KOER) Self-Test.

Possible Causes:
- Damaged MAF sensor.
- MAF sensor disconnected.
- MAF circuit open.
- VPWR circuit open.
- PWR GND circuit open.
- MAF RTN circuit open.
- MAF circuit shorted to ground.
- Air Intake Leak (near MAF sensor).
- Throttle Position (TP) system (possible closed throttle indication).
- Damaged PCM.

- Check broken/loose air outlet tube clamps (throttle body and air cleaner assembly ends), cracks/holes in air outlet tube, worn gaskets between MAF sensor and air cleaner assembly. Service as necessary.

- Start engine and bring to idle.

NOTE: If a KOER DTC 0505 is present, go to Diagnostic Trouble Code Charts. [1][2]Diagnostic Trouble Code (DTC) Charts

If a stabilized idle is not at least 700 rpm, go to Symptom Flow Charts. Testing and Inspection

- Run engine up 1500 rpm for 5 seconds, then bring it back to idle.

- Access MAF PID with a Scan Tool.

- Is the MAF PID less than 2.55 gm/sec. (0.39 volts?

YES -- The MAF SIG voltage is lower than acceptable minimum. Go to DC7. DC7 - Check VPWR Circuit Voltage

NO -- For KOER reading between 3.25 and 7.11 gm/sec. (0.60 and 1.00 volts): Go to DC15. DC15 - Check MAF Circuit Output

All others: Go to DC2. DC2 - Continuous DTC 1100: Check For MAF Intermittent Input