AutoCodes – Buick – P205D Buick

P205D Buick Code - Reductant Tank Temperature Sensor Circuit High Voltage

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
P205D Buick indicates Reductant Tank Temperature Sensor Circuit High Voltage.
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 396
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 P205D 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 P205D Buick - Reductant Tank Temperature Sensor Circuit High Voltage - AutoCodes.com
P205D Buick Code - Reductant Tank Temperature Sensor Circuit High Voltage

What are the Possible Causes of the DTC P205D 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 P205D 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 P205D 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 P205D Buick 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 P205D Buick Code

1. What are the common symptoms of OBDII code P205D in a Buick related to the Reductant Tank Temperature Sensor Circuit High Voltage?

- Common symptoms may include the check engine light illuminating, reduced engine performance, and potential issues with the vehicle's emissions system.

2. What are the possible causes of OBDII code P205D in a Buick indicating a high voltage in the Reductant Tank Temperature Sensor Circuit?

- Potential causes may include a faulty temperature sensor, wiring issues, a damaged sensor connector, or a problem with the engine control module (ECM).

3. How can I diagnose OBDII code P205D in my Buick to pinpoint the issue with the Reductant Tank Temperature Sensor Circuit?

- Diagnosis typically involves using an OBDII scanner to retrieve the specific trouble code, inspecting the sensor and its wiring for any visible damage, and testing the sensor's resistance and voltage.

4. Can driving with OBDII code P205D in a Buick be harmful to the vehicle or its components?

- Driving with this code may lead to reduced fuel efficiency and potential damage to the catalytic converter or other emission control components over time if left unresolved.

5. What are some recommended repair tips for addressing OBDII code P205D in a Buick related to the Reductant Tank Temperature Sensor Circuit High Voltage?

- Repair tips may include checking and repairing any damaged wiring or connectors, replacing the faulty temperature sensor, and resetting the trouble code with an OBDII scanner after repairs are completed.

6. Is it possible to clear OBDII code P205D in a Buick without fixing the underlying issue with the Reductant Tank Temperature Sensor Circuit?

- While clearing the code may temporarily turn off the check engine light, it is not recommended as the underlying issue may persist and potentially lead to more severe problems in the future.

7. Can a DIY enthusiast with basic automotive knowledge fix OBDII code P205D in a Buick themselves?

- Depending on the specific cause of the code, some DIY enthusiasts may be able to address the issue by replacing the sensor, checking and repairing wiring, and clearing the trouble code using an OBDII scanner.

8. How critical is it to address OBDII code P205D promptly in a Buick to ensure optimal vehicle performance?

- Promptly addressing this code is important to maintain optimal vehicle performance, prevent potential damage to emission components, and ensure compliance with emission regulations.

9. Are there any recalls or technical service bulletins related to OBDII code P205D in Buick vehicles?

- It is recommended to check with a Buick dealership or visit the National Highway Traffic Safety Administration (NHTSA) website to see if there are any recalls or technical service bulletins related to this specific OBDII code.

10. How can regular maintenance help prevent issues like OBDII code P205D from occurring in a Buick's Reductant Tank Temperature Sensor Circuit?

- Regular maintenance, including inspecting and replacing sensors as recommended by the manufacturer, checking wiring harnesses for wear, and keeping up with scheduled tune-ups, can help prevent issues like OBDII code P205D from occurring.

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