If hardware checks out, the BSI may have corrupted software. A Peugeot dealer or specialist with a full Diagbox license can perform a "Download" or "Configuration" procedure. This is essentially a firmware reflash.
Typically results in a "Crank but No Start" condition, as the ignition positive signal is critical for powering essential engine management components. 2. Symptom Analysis Engine Non-Start:
Since the code specifies a potential "short circuit to positive" in the output harness:
Below are two draft reviews: one addressing the vehicle model (Peugeot 208 A9) and another for technical troubleshooting if you are experiencing the A9B7 fault code. Draft 1: Peugeot 208 (A9 Chassis, 2012–2019) Review