| Fault Code | Possible cause | Action |
| P1107 | Ambient pressure sensor circuit short circuit to ground | View & note "freeze frame" data if available. View & note "sensor" data. Ensure sensor connector is secure. Disconnect ECM and proceed to pinpoint testl: |
| P1108 | Ambient pressure sensor circuit, short circuit to supply or open circuit | Disconnect ambient pressure sensor and proceed to pinpoint test 4. |
Pinpoint tests
| Test | Result | Action |
| 1 Check cable and terminal integrity: - ECM pin A23 - ECM pin A07 - ECM pin A01 | OK | Disconnect ambient pressure sensor and proceed to test 2 |
| Faulty | Rectify fault, proceed to test 5 | |
| 2 Check cable for short circuit: - ECM pin A23 to ECM A07 | OK | Proceed to test 3 |
| Short circuit | Locate and rectify wiring fault, proceed to test 5 | |
| 3 Check cable for continuity: - ECM pin A23 to sensor pin 3 - ECM pin A07 to sensor pin 2 - ECM pin A01 to sensor pin 1 | OK | Renew ambient pressure sensor and proceed to test 5 |
| Open circuit | Locate and rectify wiring fault, proceed to test 5 | |
| 4 Check cable for short circuit: - ECM pin A23 to ECM pin A01 | OK | Renew ambient pressure sensor and proceed to test 5 |
| Short circuit | Locate and rectify wiring fault, proceed to test 5 | |
| 5 Reconnect harness, clear fault code and run engine | OK | Action complete, quit test |
| Fault still present | Contact Triumph service |
Circuit diagram
