P0050

Symptoms

• Check Engine light on dashboard
• Increased fuel consumption, especially on a cold engine
• Increased exhaust toxicity
• Possible unstable engine operation after a cold start
• Bank 2 oxygen sensor slow warm-up

Causes

• Open or short circuit in bank 2 oxygen sensor heater circuit
• Burnt out heating element inside the sensor
• Blown lambda probe heater circuit fuse
• Faulty relay or heater control key in the ECU
• Mechanical damage or breakage of the sensor connector

How to Fix

1. Read codes, check for related codes on oxygen sensors
2. Check the lambda probe heater circuit fuse (usually in the engine fuse box)
3. Measure the resistance of the sensor heater between the corresponding connector contacts (standard 2–20 Ohms)
4. Check the supply voltage to the heater when the engine is running.
5. Inspect the sensor connector and wiring for damage and oxidation.
6. If the heater is faulty, replace the oxygen sensor of bank 2, sensor 1

Related codes

Error P0050 by Vehicle Brand