AutoCodes – Buick – P205B Buick

P205B Buick Code - Reductant Tank Temperature Sensor Circuit Range/Performance

Quick Answer

The Reductant Tank Temperature Sensor is a variable resistor used to measure the temperature inside the reductant tank. Common causes include Faulty Reductant Pump and Sensor Assembly, Reductant Pump and Sensor Assembly harness is open or shorted, Reductant Pump and Sensor Assembly circuit poor electrical connection. Severity is High - diagnose this code as soon as possible. Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.

What it means
P205B Buick indicates Reductant Tank Temperature Sensor Circuit Range/Performance.
Common causes
Common causes include Faulty Reductant Pump and Sensor Assembly, Reductant Pump and Sensor Assembly harness is open or shorted, Reductant Pump and Sensor Assembly circuit poor electrical connection.
Severity
High - diagnose this code as soon as possible.
Can I drive?
Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
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Code Popularity 368
How popular is this code, among other codes? Low
Table of contents Created and updated by William Orellana on Mar 21, 2022
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Code P205B Buick Description

The Reductant Tank Temperature Sensor is a variable resistor used to measure the temperature inside the reductant tank. The sensor is wired to the Reductant Control Module, which acquires the sensor signal and sends it to the Engine Control Module (ECM) via serial data. The Reductant Control Module supplies 5 V to the reductant temperature sensor signal circuit and a ground for the low reference circuit. The Diagnostic Trouble Code (DTC) will be set when the difference between reductant temperature sensor signal and exhaust gas temperature sensor signals is outside a calibrated range.
OBDII Code P205B Buick - Reductant Tank Temperature Sensor Circuit Range/Performance - AutoCodes.com
P205B Buick Code - Reductant Tank Temperature Sensor Circuit Range/Performance

What are the Possible Causes of the DTC P205B Buick?

  • Faulty Reductant Pump and Sensor Assembly
  • Reductant Pump and Sensor Assembly harness is open or shorted
  • Reductant Pump and Sensor Assembly circuit poor electrical connection
  • Faulty Reductant Control Module

How to Fix the DTC P205B Buick?

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 P205B Buick 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 P205B Buick code?

Need more information on how to fix the P205B Buick code? Get Access to Factory Service Manuals

Need Help with the Code?

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About the author: William Orellana is a Master Mechanic and Mechanical Engineer with over 30 years of experience diagnosing and repairing vehicles. Learn more about his background.

Frequently Asked Questions about P205B Buick Code

1. What are the common symptoms of OBDII code P205B in a Buick related to the Reductant Tank Temperature Sensor Circuit Range/Performance?

The common symptoms include poor engine performance, reduced fuel efficiency, and the illumination of the Check Engine Light.

2. What are the possible causes of OBDII code P205B in a Buick indicating issues with the Reductant Tank Temperature Sensor Circuit Range/Performance?

Possible causes include a faulty temperature sensor, wiring issues, a failed sensor connector, or a problem with the reductant tank heater.

3. How can I diagnose the OBDII code P205B in my Buick that points to a problem with the Reductant Tank Temperature Sensor Circuit Range/Performance?

To diagnose this issue, you may need to use an OBDII scanner to read the code, visually inspect the wiring and sensor connections, and perform electrical tests on the sensor itself.

4. Can I continue driving my Buick with the OBDII code P205B related to the Reductant Tank Temperature Sensor Circuit Range/Performance?

It is not recommended to continue driving with this code as it can lead to reduced engine performance and potential damage to the vehicle's emissions system.

5. How can I repair OBDII code P205B in my Buick caused by issues with the Reductant Tank Temperature Sensor Circuit Range/Performance?

Repair options may include replacing the temperature sensor, repairing any damaged wiring, ensuring proper sensor connection, or addressing any faults with the reductant tank heater.

6. Are there any DIY tips for addressing OBDII code P205B in a Buick related to the Reductant Tank Temperature Sensor Circuit Range/Performance?

DIY tips may include checking and cleaning sensor connections, inspecting for visible wiring damage, and ensuring the reductant tank heater is functioning properly.

7. How critical is it to address OBDII code P205B in a Buick indicating issues with the Reductant Tank Temperature Sensor Circuit Range/Performance?

It is important to address this code promptly to prevent further damage to the vehicle's emissions system and ensure optimal engine performance and fuel efficiency.

8. Can weather conditions affect the triggering of OBDII code P205B in a Buick due to the Reductant Tank Temperature Sensor Circuit Range/Performance?

Extreme weather conditions, particularly very low temperatures, can impact the performance of the reductant tank temperature sensor and potentially trigger this code.

9. Is it necessary to reset the Check Engine Light after addressing OBDII code P205B in a Buick caused by the Reductant Tank Temperature Sensor Circuit Range/Performance issue?

It is recommended to reset the Check Engine Light using an OBDII scanner after addressing the underlying problem to ensure proper monitoring of the vehicle's status and performance.

10. Can a mechanic or dealership help diagnose and repair OBDII code P205B in a Buick related to the Reductant Tank Temperature Sensor Circuit Range/Performance?

Yes, a qualified mechanic or dealership with the necessary diagnostic tools and expertise can help diagnose and repair this code to ensure the vehicle operates correctly.

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