A0B4 — CAS: Engine Start, Starter Operation

The CAS recorded a starter operation event. On its own it confirms the module knows a start was attempted and is normally a consequence of repeated cranking, not the cause of a no-start.

Common causes on MINI

• Repeated crank attempts during diagnosis
• Start authorization interrupted mid-crank
• Low battery voltage during cranking

Documented repairs

2010 MINI Cooper S Crank No-Start: Crank Sensor Circuit & DME

2010 MINI Cooper S (R56, N14 1.6L Turbo)

A0B1A0B42BD42983

A 2010 MINI Cooper S cranked but would not start with no RPM at the DME. Scope testing traced it to a dead crank sensor signal bias inside the DME.

Read the diagnosis →

Components

• AGM Battery
• Camshaft Position Sensor
• Camshaft Position Sensor Connector
• Crankshaft Position Sensor
• Oil Pressure Sensor

Engines

• N14 1.6L Turbo

Models

• R56 MINI Cooper S

Repairs by System

• Electrical
• DME
• Engine Electrical
• No Start
• Starting Problems

Symptoms

• Extended Crank
• No Start
• Reduced Engine Power
• Running Rich
• Stalling

Procedures

• Wiring Repair
• Compression Testing
• DME Programming
• ISTA Diagnosis
• Oscilloscope Testing