P0162 Code - O2 Sensor Circuit Malfunction 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
- P0162 indicates O2 Sensor Circuit Malfunction 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 P0162 Description
What are the Possible Causes of the DTC P0162?
- 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 P0162?
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 P0162 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.
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Information for Specific Makes
- P0162 Mercedes-Benz — O2 Sensor Circuit Malfunction Bank 2 Sensor 3
Frequently Asked Questions about P0162 Code
1. What does OBDII code P0162 mean?
Code P0162 indicates a malfunction in the oxygen sensor circuit for Bank 2 Sensor 3, typically related to poor communication or performance of the sensor.
2. What are the symptoms of code P0162?
Common symptoms include an illuminated check engine light, reduced fuel efficiency, and possible engine performance issues such as rough idling or misfires.
3. What causes code P0162?
Possible causes include a faulty oxygen sensor, damaged wiring or connectors, exhaust leaks, or issues with the vehicle’s ECM (Engine Control Module).
4. How do I diagnose code P0162?
Use an OBDII scanner to confirm the code, inspect the wiring and connectors for damage, and test the oxygen sensor for proper functionality.
5. Can I drive with code P0162?
While your vehicle may still be drivable, prolonged driving with this code can lead to reduced fuel efficiency and potential long-term engine damage.
6. How do I fix code P0162?
Repairs may include replacing the oxygen sensor, repairing or replacing damaged wiring, ensuring proper exhaust system function, or updating the ECM software if needed.
7. What tools are needed to repair code P0162?
You may need an OBDII scanner, a multimeter, basic automotive tools, and possibly a replacement oxygen sensor.
8. How much does it cost to fix code P0162?
Repair costs can range from $150 to $400 depending on whether the issue is with the sensor itself or related wiring and labor.
9. Can a dirty oxygen sensor trigger code P0162?
Yes, contamination from oil or coolant can impair the sensor’s functionality and trigger this code.
10. Does code P0162 affect emissions testing?
Yes, since it relates to an oxygen sensor malfunction, it can lead to increased emissions and cause your vehicle to fail an emissions test.
Discuss the causes and fixes for P0162 OBDII Code
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