P0163 Mercedes-Benz Code - O2 Sensor Circuit Low Voltage Bank 2 Sensor 3
Quick Answer
The rear heated oxygen sensor (or sensor 3 for some vehicles), after three way catalyst (manifold), monitors the oxygen level in the exhaust gas on each bank. Common causes include Faulty Heated Oxygen Sensor Bank 2 Sensor 3, Heated Oxygen Sensor Bank 2 Sensor 3 harness is open or shorted, Heated Oxygen Sensor Bank 2 Sensor 3 circuit poor electrical connection. Severity is Moderate - service should be scheduled soon. The vehicle may still be drivable for short trips if it runs normally, but avoid hard driving and repair it soon.
- What it means
- P0163 Mercedes-Benz indicates O2 Sensor Circuit Low Voltage Bank 2 Sensor 3.
- Common causes
- Common causes include Faulty Heated Oxygen Sensor Bank 2 Sensor 3, Heated Oxygen Sensor Bank 2 Sensor 3 harness is open or shorted, Heated Oxygen Sensor Bank 2 Sensor 3 circuit poor electrical connection.
- Severity
- Moderate - service should be scheduled soon.
- Can I drive?
- The vehicle may still be drivable for short trips if it runs normally, but avoid hard driving and repair it soon.
Code P0163 Mercedes-Benz Description
What are the Possible Causes of the DTC P0163 Mercedes-Benz?
- Faulty Heated Oxygen Sensor Bank 2 Sensor 3
- Heated Oxygen Sensor Bank 2 Sensor 3 harness is open or shorted
- Heated Oxygen Sensor Bank 2 Sensor 3 circuit poor electrical connection
How to Fix the DTC P0163 Mercedes-Benz?
Review the 'Possible Causes' above and visually examine the corresponding wiring harness and connectors. Check for damaged components and inspect connector pins for signs of being broken, bent, pushed out, or corroded.
What is the Cost to Diagnose the Code?
Labor: 1.0
To diagnose the P0163 Mercedes-Benz code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.
Need more information about the P0163 Mercedes-Benz code?
Need more information on how to fix the P0163 Mercedes-Benz code? Get Access to Factory Service Manuals
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Frequently Asked Questions about P0163 Mercedes-Benz Code
1. What are the common symptoms of OBDII code P0163 in a Mercedes-Benz?
- Common symptoms include poor fuel efficiency, rough idling, engine misfires, and the illumination of the check engine light.
2. What does the OBDII code P0163 indicate in a Mercedes-Benz?
- OBDII code P0163 indicates a low voltage condition in the O2 sensor circuit of Bank 2 Sensor 3 in a Mercedes-Benz.
3. What are the possible causes of O2 Sensor Circuit Low Voltage Bank 2 Sensor 3 in a Mercedes-Benz?
- Possible causes include a faulty O2 sensor, damaged wiring or connectors, exhaust leaks near the sensor, or a malfunctioning engine control module.
4. How can I diagnose OBDII code P0163 in my Mercedes-Benz?
- Diagnosing code P0163 involves using an OBDII scanner to retrieve the fault code and then inspecting the O2 sensor, wiring, and connectors for any issues.
5. Can I drive my Mercedes-Benz with the OBDII code P0163?
- It is not recommended to drive your Mercedes-Benz with code P0163 as it can lead to poor engine performance and potential damage to the catalytic converter.
6. How can I repair O2 Sensor Circuit Low Voltage Bank 2 Sensor 3 in my Mercedes-Benz?
- Repairing code P0163 may involve replacing the O2 sensor, repairing damaged wiring or connectors, fixing exhaust leaks, or reprogramming the engine control module.
7. Is it safe to reset the check engine light after fixing OBDII code P0163 in a Mercedes-Benz?
- It is recommended to reset the check engine light only after confirming that the underlying issue causing code P0163 has been properly repaired.
8. How much does it cost to fix O2 Sensor Circuit Low Voltage Bank 2 Sensor 3 in a Mercedes-Benz?
- The cost of fixing code P0163 can vary depending on the cause of the issue, but it typically ranges from $200 to $500 for parts and labor.
9. Can a DIY enthusiast repair OBDII code P0163 in a Mercedes-Benz?
- While some DIY enthusiasts may have the skills to replace an O2 sensor or repair wiring, diagnosing and fixing code P0163 in a Mercedes-Benz may require professional expertise.
10. How often does O2 Sensor Circuit Low Voltage Bank 2 Sensor 3 occur in Mercedes-Benz vehicles?
- The occurrence of OBDII code P0163 in a Mercedes-Benz can vary, but it is not an uncommon issue, especially in older vehicles or those with high mileage.
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