Peugeot 2008 Sos Battery Replacement -

: Connecting an OBD2 diagnostic tool reveals fault codes such as B1803 (Telematics backup battery voltage below threshold) or similar hardware-level eCall power errors. SOS Battery vs. Main 12V Battery

The Peugeot 2008 (both Mk1 and Mk2) features an emergency call system (SOS button) that works independently of the main car battery. This system includes a small, rechargeable NiMH battery pack (often called a or emergency telematics backup battery ) located within the vehicle's telematics control unit (TCU).

: Reading the car's OBD2 system via diagnostic tools reveals code B180A (Telematics backup battery fault or open circuit). What Type of SOS Battery Does the Peugeot 2008 Use? peugeot 2008 sos battery replacement

These batteries typically last between 4 to 8 years .

If the warning persists after driving the car for a few miles, you will need to clear the stored fault codes using a diagnostic tool compatible with PSA vehicles (such as DiagBox or a high-end aftermarket OBD2 scanner). Clearing the code forces the telematics module to re-evaluate the health of the backup battery loop. : Connecting an OBD2 diagnostic tool reveals fault

Inspect the module

Typically T20 or T25 sizes, depending on the exact year of your Peugeot 2008. This system includes a small, rechargeable NiMH battery

: 10mm socket to disconnect the main battery terminals. Phase 1: Main Electrical Isolation

, which is located under the dashboard near the steering column or behind the overhead console. The Lifespan : These batteries are designed for about eight years of use, after which capacity can drop by 75%. The "Red Light" Warning

A flashing red light indicates the backup battery needs replacement. A fixed red light indicates a system malfunction.