DTC P0103 - Mass Airflow Sensor Circuit High
Conditions for setting dtc P0103
| ￭ | Engine Running |
| ￭ | Mass Airflow Sensor Frequency ≥ 12,000 Hz |
| ￭ | The above must be present for a period of 128 instances/cycles or greater to trigger DTC P0103 |
NOTE: Both the Terminated Gen III Drive-By-Cable & Gen IV Drive-By-Wire harnesses will have a 5 wire MAF that integrates with the IAT. Customers will have to purchase an adapter harness from EFI to split the 3 wire MAF sensor.
|
Step |
Action |
Value (s) |
YES |
NO |
|
1 |
- Key on, Engine running - Within VCM Live, open the MAF sensor DTC parameter, does the MAF sensor parameter display more than 12,000 Hz? |
≥ 12,000 Hz |
Go to Step 2 |
Intermittent Issue (Refer to Intermittent Diagnostics) |
|
2 |
- Key Off - Disconnect the MAF sensor connector from the wiring harness - Jump the MAF signal cavity "A" - Key On - Does VCM Live display MAF voltage of 0.1 volts or less? |
|
Go to Step 3 |
Repair the circuit as necessary, locate any wires that need to be repaired or replaced. |
|
3 |
- Inspect MAF connector and pins for corrosion, contamination or any physical damage. - any issues found? |
|
Repair any issues found and retest. |
Go to Step 4 |
|
4 |
- Key off - Disconnect the CORE connector "C" - Check continuity between the MAF sensor connector signal cavity "A" and ECU MAP signal pin C2-15 - Do you have continuity between them? |
|
Go to Step 5 |
Repair the circuit as necessary, locate any wires that need to be repaired or replaced. |
|
5 |
- Check for continuity between the MAF sensor connector signal cavity "A" and pin C2-15? - Do you have continuity between them? |
|
Go to Step 6 |
Repair the circuit as necessary, locate any wires that need to be repaired or replaced. |
|
6 |
- Check for continuity between the MAF sensor connector ground cavity "B" (WHT/BLK) wire and ECU ground pin C23-B. - Do you have continuity between them? |
|
Go to Step 7 |
Repair the circuit as necessary, locate any wires that need to be repaired or replaced. |
|
7 |
- Replace MAF Sensor - Is the replacement of the MAF sensor complete? |
|
Go to Step 8 |
|
|
8 |
- Clear any DTC from the ECU - Turn the ignition off and wait 30 seconds - Start the engine and operate the engine to full operating temperature - Observe the Check Engine Light on the Menu bar in VCM Live - After operating the engine within the test parameters, check for any store codes - Does the engine operate without any stored DTC's? |
|
System is now operational and ready to be tuned. |
Contact HP Tuners Support |
Table 3. Mass Airflow Sensor Circuit High Diagnostics Table
Figure 1. MAF Sensor Cavity Connector Location
