P0145 Mercedes-Benz Code - O2 Sensor Circuit Slow Response Bank 1 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 1 Sensor 3, Heated Oxygen Sensor Bank 1 Sensor 3 harness is open or shorted, Heated Oxygen Sensor Bank 1 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
- P0145 Mercedes-Benz indicates O2 Sensor Circuit Slow Response Bank 1 Sensor 3.
- Common causes
- Common causes include Faulty Heated Oxygen Sensor Bank 1 Sensor 3, Heated Oxygen Sensor Bank 1 Sensor 3 harness is open or shorted, Heated Oxygen Sensor Bank 1 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 P0145 Mercedes-Benz Description
This sensor is made of ceramic zirconia. The zirconia generates voltage from approximately 1V in richer conditions to 0V in leaner conditions. Under normal conditions the heated oxygen sensor 3 is not used for engine control operation.
What are the Possible Causes of the DTC P0145 Mercedes-Benz?
- Faulty Heated Oxygen Sensor Bank 1 Sensor 3
- Heated Oxygen Sensor Bank 1 Sensor 3 harness is open or shorted
- Heated Oxygen Sensor Bank 1 Sensor 3 circuit poor electrical connection
How to Fix the DTC P0145 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 P0145 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 P0145 Mercedes-Benz code?
Need more information on how to fix the P0145 Mercedes-Benz code? Get Access to Factory Service Manuals
Need Help with the Code?
Get the P0145 Mercedes-Benz code diagnosed by a professional: Find a repair shop in your area
Frequently Asked Questions about P0145 Mercedes-Benz Code
1. What are common symptoms of OBDII code P0145 in a Mercedes-Benz related to the O2 sensor circuit slow response on Bank 1 Sensor 3?
- Common symptoms include decreased fuel efficiency, rough idling, and potential engine misfires.
2. What are the possible causes of OBDII code P0145 in a Mercedes-Benz?
- The code P0145 is typically triggered by issues such as a faulty oxygen sensor, wiring problems, or an exhaust system leak.
3. How can I diagnose the O2 sensor circuit slow response in Bank 1 Sensor 3 in my Mercedes-Benz?
- Use an OBDII scanner to retrieve the specific error code, visually inspect the wiring and connectors, and perform a voltage test on the oxygen sensor.
4. Is it safe to continue driving my Mercedes-Benz with OBDII code P0145?
- While the vehicle may still operate, it is recommended to address the issue promptly to prevent potential damage to the catalytic converter and ensure optimal engine performance.
5. Can I repair OBDII code P0145 on my Mercedes-Benz myself?
- If you have experience with automotive repairs and access to the necessary tools, you may be able to replace the oxygen sensor or repair wiring issues yourself. Otherwise, professional assistance is recommended.
6. How much does it typically cost to repair OBDII code P0145 in a Mercedes-Benz?
- The cost of repairing this code can vary depending on the specific issue causing it, but it may range from $100 to $300 for parts and labor.
7. Are there any maintenance tips to prevent OBDII code P0145 from occurring in my Mercedes-Benz?
- Regularly inspecting and replacing the oxygen sensors as part of routine maintenance can help prevent the occurrence of code P0145.
8. Will resetting the OBDII code P0145 in my Mercedes-Benz make it go away permanently?
- Resetting the code may temporarily turn off the check engine light, but if the underlying issue is not addressed, the code is likely to reappear.
9. How long does it take to repair OBDII code P0145 in a Mercedes-Benz?
- The repair time can vary depending on the specific cause of the code, but it may take anywhere from 1 to 3 hours at a repair shop.
10. Can a Mercedes-Benz still pass emissions testing with OBDII code P0145 present?
- A vehicle with an active OBDII code like P0145 is likely to fail emissions testing, so it is recommended to address and resolve the issue before testing.
Discuss the causes and fixes for P0145 Mercedes-Benz OBDII Code
Code P0145 Mercedes-Benz comments
No comments found for this page.
Fix Your Car Smarter
Try the New AutoCodes App!
Get complete OBDII diagnostics, repair solutions, and cost estimates, plus AI chat support on demand.
