Aston Martin diagnostic trouble code

P1796: CAN Controller Circuit (Bus off)

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
Electrical and control modules
Manual coverage
DB9
Warning-lamp status
DB9: MIL

What Aston Martin code P1796 means

CAN Controller Circuit (Bus off)

DB9 preliminary diagnostic manual · section 2-280

Manufacturer fault-analysis procedure

Manual fault definition

P1796 CAN Timeout, TCM CAN Driver.

Test sequence and decision path

1. Connect the WDS and confirm that P1796 is
logged.

2. Analyse the problem using the High Speed CAN
Bus fault analysis procedure in the introduction
section of this manual.
Open the corresponding manual page for wiring diagrams and figures