Aston Martin diagnostic trouble code

P2805: Position-information fault on the serial backup line

Use this reference to understand the recorded condition, confirm the available V8 Vantage or DB9 manual coverage, and follow the documented diagnostic checks before replacing parts.

Code family
Powertrain
Vehicle system
Other vehicle system
Manual coverage
DB9
Warning-lamp status
DB9: Non-MIL

What Aston Martin code P2805 means

Position-information fault on the serial backup line

DB9 preliminary diagnostic manual · section 2-320

Manufacturer fault-analysis procedure

Test sequence and decision path

1. Connect the WDS and confirm that P2805 is
logged. Clear the logged fault code.

2. Check continuity from transmission connector
C0932-1 to Primary PCM connector C0635-3.
If continuity is poor, service the circuit as necessary. Reconnect all components and run a KOEO
test to ensure that the problem is resolved.
If continuity is good, Check for votage and then
resistance from C0635-3 to ground.
If any short to supply or to ground is detected,
service the circuit as necessary and run a KOEO
test to ensure that the problem is resolved.
Open the corresponding manual page for wiring diagrams and figures