Question 1

What does B2AAA multiple body module faults mean on my car?

Accepted Answer

B2AAA is a generic body-system code indicating that multiple body control modules are reporting faults simultaneously. When several modules fail at the same time, the root cause is almost never five separate broken modules — it is almost always a shared power supply failure, a poor earth connection, or a CAN bus communication problem that makes every module on that network appear faulty.

Question 2

How much does auto electrical fault diagnosis cost in Palmers Green?

Accepted Answer

At MnF Motors, our diagnostic inspection starts from £55 and includes a full multi-system scan and a written assessment of root cause. For complex B2AAA / multi-module fault investigations involving CAN bus or supply tracing, a more detailed diagnostic session is priced transparently before any work begins. Call 020 8803 1231 for a same-day quote.

Question 3

Will I need to replace all the modules that are showing faults?

Accepted Answer

Almost certainly not. When B2AAA and multiple body codes appear together, experienced auto electricians know this pattern points to one upstream fault — a corroded earth strap, a failing fusible link, a bad battery connection, or CAN bus signal corruption. Replacing modules without fixing the root cause is expensive and ineffective. Proper diagnosis saves you money.

Question 4

How long does B2AAA fault diagnosis take at MnF Motors?

Accepted Answer

A standard multi-module diagnostic session typically takes between one and three hours depending on vehicle complexity. We'll give you a realistic time estimate when you book. Many Palmers Green customers drop off in the morning and collect the same day with a full written diagnosis report.

Question 5

Is MnF Motors able to fix the fault once diagnosed, or do I need to go elsewhere?

Accepted Answer

We carry out the full repair in-house. Once our auto electricians have identified the root cause — whether that's an earth fault, a supply wiring repair, CAN bus rectification, or genuine module replacement — we provide a fixed-price repair quote with a warranty on all parts and labour. You don't need to go anywhere else.