DTC P0103 (6-Speed A/T, '16-'18 9-Speed A/T)

DTC P0103  : MAF Sensor Circuit High Voltage

DTC (PGM-FI)

1. Problem verification

   -1. Turn the vehicle to the ON mode, and wait 2 seconds.

   - 2. Check the parameter (s) below with the HDS.

   Signal	Threshold		Current conditions
   	Values	Unit	Values	Unit
   MAF SENSOR	More than 4.89	V

   Do the current condition (s) match the threshold?

   YES 

   The failure is duplicated. Go to step 2.

   NO 

   Intermittent failure, the system is OK at this time. Check for poor connections or loose terminals at the MAF sensor/IAT sensor and the PCM. If the on-board snapshot of this DTC is recorded, try to reproduce the failure under the same conditions with the on-board snapshot - Refer to: How to Troubleshoot the Fuel and Emissions Systems .

2. Open wire check (VGM line)

   -1. Turn the vehicle to the OFF (LOCK) mode.

   - 2. Jump the SCS line with the HDS, and wait more than 1 minute.

   - 3. Disconnect the following connectors.

   MAF sensor/IAT sensor 5P connector

   PCM connector A (51P)

   - 4. Check for continuity between test points 1 and 2.

   Test condition	Vehicle OFF (LOCK) mode
   	MAF sensor/IAT sensor 5P connector: disconnected
   	PCM connector A (51P): disconnected
   Test point 1	MAF sensor/IAT sensor 5P connector (female terminals) No. 2:
   Test point 2	PCM connector A (51P) No. 21 - Refer to: PCM Connector for Inputs and Outputs (9-Speed A/T) (2016 2017 2018), or PCM Connector for Inputs and Outputs (6-Speed A/T) (2016 2017 2018 2019 2020)

   Courtesy of HONDA, U.S.A., INC.

   Is there continuity?

   YES 

   The VGM wire is OK. Go to step 3.

   NO 

   Repair an open in the VGM wire between the PCM (A21) and the MAF sensor/IAT sensor.

3. PCM internal circuit check

   -1. Reconnect the following connector.

   PCM connector A (51P)

   - 2. Check for continuity between test points 1 and 2.

   Test condition	Vehicle OFF (LOCK) mode
   	MAF sensor/IAT sensor 5P connector: disconnected
   Test point 1	MAF sensor/IAT sensor 5P connector (female terminals) No. 2:
   Test point 2	Body ground

   Courtesy of HONDA, U.S.A., INC.

   Is there continuity?

   YES 

   The PCM internal circuit is OK. Replace the MAF sensor/IAT sensor .

   NO 

   Check for any authorized service information related to the DTCs or symptoms you are troubleshooting or substitute a known-good PCM - Refer to: PCM Removal and Installation (6-Speed A/T), (9-Speed A/T 2016 2017 2018) .