APRILIA Motorcycle Fault Codes
APRILIA Motorcycle Fault Codes DTC
To display fault codes:
1) Remove right side panel (the piece that covers the rear subframe and lower gas tank) by removing the two 4mm button-head Allen bolts. Be careful of the plastic tabs on the backside of the panels.
2) You will find two unconnected wires near a big harness clip near the side of the battery. You cannot miss these wires. They are the only 2 unconnected wires in there.
3) Connect the two wires together.
4) Turn key switch to "ON/RUN".
5) DO NOT start or attempt to start engine.
6) The message "DIAG" should appear on left LCD screen along with a number indicating the Fault Code.
7) If your bike is still under warranty, let your Aprilia dealer do all of this.
| Component | Fault Code DTC | Possible Cause |
| Camshaft position sensor | 11 |
Sensor not connected.
Sensor broken. Wiring faulty. |
| Crankshaft position sensor | 12 | |
| Intake pressure sensor | 13 | |
| Intake pressure sensor | 14 | Excessive pressure difference between two pressure sensors |
| Throttle position sensor | 15 |
Sensor not connected.
Sensor broken. Wiring faulty. |
| Coolant temperature sensor | 21 | |
| Air temperature sensor | 22 | |
| Atmospheric pressure sensor (inside ECU) | 23 | Sensor faulty |
| Ignition coil 1, Front cylinder | 33 | Ignition coil faulty or wiring not connected |
| Ignition coil 2, Front cylinder | 34 | |
| Ignition coils 1 and 2, Front cylinder | 33,34 | |
| Ignition coil 1, Rear cylinder | 35 | |
| Ignition coil 2, Rear cylinder | 36 | |
| Ignition coils 1 and 2, Rear cylinder | 35,36 | |
| Fall Sensor (tip-over sensor) | 41 |
Sensor not connected.
Sensor broken. Wiring faulty. |