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2002 MERCEDES-BENZ SL

3.0L I6•RWD•AUTOMATIC•gas
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Repairs0Labor564Torque3477Fluid7DTC698Battery1Maintenance0Recalls0
P0151moderate severityPowertrain

O2 Sensor Circuit Low Voltage Bank 2 Sensor 1

on 2002 Mercedes-Benz SL 3.0L I6 · RWD

What this code means

The upstream O2 sensor voltage on Bank 2 is staying low.

Symptoms

  • Check Engine Light
  • Lean running Bank 2
  • Rough idle

Common causes

  • Vacuum leak Bank 2
  • Faulty sensor
  • Exhaust leak
  • Low fuel pressure

Diagnostic steps

  1. Check vacuum leaks Bank 2
  2. Monitor sensor voltage
  3. Test fuel pressure

Repair notes

Fix leak or replace sensor.

Other Powertrain codes on this vehicle

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