P1124 – Mixture Too Rich (Bank 1) (BMW)

Description

P1124 BMW indicates the mixture is too rich on Bank 1.

Need More Than Just the Fault Code?

A diagnostic scanner with live data, freeze-frame information and the right system access can help you investigate the actual cause before replacing parts.

Compare Diagnostic Scanners

Symptoms

  • Poor fuel economy
  • Rough idle
  • Black smoke

Causes

  • Leaking injector
  • Fuel pressure too high
  • MAF fault

Diagnosis

  • Check fuel trims
  • Inspect injectors
  • Test fuel pressure

Repair

  • Replace injector
  • Repair fuel system
  • Replace MAF