P0159 MERCEDES-BENZ - O2 Sensor Circuit Slow Response Bank 2 Sensor 2
P0159 MERCEDES-BENZ Possible Causes
- Faulty Rear Heated Oxygen Sensor Bank 2
- Rear Heated Oxygen Sensor Bank 2 harness is open or shorted
- Rear Heated Oxygen Sensor Bank 2 circuit poor electrical connection
How is the P0159 MERCEDES-BENZ code repair?Start by checking the "Possible Causes" listed above. Visually inspect the related wiring harness and connectors. Check for damaged components and look for broken, bent, pushed out, or corroded connector's pins.
Replacing the O2 Sensor 2 usually takes care of the problem
What is the cost to diagnose the P0159 MERCEDES-BENZ code
Labor: 1.0The cost to diagnose the P0159 MERCEDES-BENZ code is 1.0 hour of labor. The auto repair's diagnosis time and labor rates vary by location, vehicle's make and model, and even your engine type. Most auto repair shops charge between $75 and $150 per hour.
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When is the code detected?The P0159 code is set when the Engine Control Module (ECM) detects that the rear O2 sensor takes more time to respond between rich and lean than the specified time.
- Engine Light ON (or Service Engine Soon Warning Light)
- High Fuel Consumption
- Excessive Smoke from Exhaust
P0159 MERCEDES-BENZ MeaningThis fault code is stored in the engine control module when the oxygen sensor response time is not as expected. This condition occurs if the sensor has been contaminated or is suffering from ageing. The ECM expects a voltage shift within a specific time frame under transient conditions. The rise and fall time of the sensor is monitored for this.
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