AutoCodes – Generic – P205C

P205C Code - Reductant Tank Temperature Sensor Circuit Low 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
P205C indicates Reductant Tank Temperature Sensor Circuit Low 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 31,622
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 P205C 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 P205C - Reductant Tank Temperature Sensor Circuit Low Voltage - AutoCodes.com
P205C Code - Reductant Tank Temperature Sensor Circuit Low Voltage

What are the Possible Causes of the DTC P205C?

  • 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 P205C?

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 P205C 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 P205C code?

Need more information on how to fix the P205C code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P205C code diagnosed by a professional: Find a repair shop in your area

Information for Specific Makes

  • P205C Audi β€” Reductant Tank Temperature Sensor Circuit Low
  • P205C Buick β€” Reductant Tank Temperature Sensor Circuit Low Voltage
  • P205C Cadillac β€” Reductant Tank Temperature Sensor Circuit Low Voltage
  • P205C Chevrolet β€” Reductant Tank Temperature Sensor Circuit Low Voltage
  • P205C Dodge β€” Reductant Tank Temperature Sensor Circuit Low
  • P205C Ford β€” Reductant Tank Temperature Sensor Circuit Low
  • P205C GMC β€” Reductant Tank Temperature Sensor Circuit Low Voltage
  • P205C Volkswagen β€” Reductant Tank Temperature Sensor Circuit Low
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 P205C Code

1. What are the common symptoms of OBDII code P205C (Reductant Tank Temperature Sensor Circuit Low Voltage)?

- Common symptoms include poor engine performance, decreased fuel efficiency, and the illumination of the check engine light.

2. What are the possible causes of OBDII code P205C?

- The code P205C can be caused by a faulty reductant tank temperature sensor, damaged wiring or connectors in the sensor circuit, or issues with the powertrain control module (PCM).

3. How can I diagnose the cause of OBDII code P205C?

- Diagnose the code by checking the reductant tank temperature sensor for proper operation, inspecting the sensor wiring and connectors for damage, and using an OBDII scanner to gather more information about the issue.

4. Can I continue driving my vehicle with OBDII code P205C?

- It is not recommended to continue driving with the code P205C, as it can lead to further damage to the vehicle's emissions system and may cause decreased performance and fuel efficiency.

5. How can I repair OBDII code P205C?

- Repair options include replacing the faulty reductant tank temperature sensor, repairing any damaged wiring or connectors in the sensor circuit, and resetting the code using an OBDII scanner.

6. Will OBDII code P205C cause my vehicle to fail an emissions test?

- Yes, OBDII code P205C can cause your vehicle to fail an emissions test due to the malfunction in the reductant tank temperature sensor circuit.

7. Is it safe to ignore OBDII code P205C and not address the issue?

- Ignoring OBDII code P205C can lead to more severe issues with your vehicle's emissions system and may result in decreased performance and fuel efficiency. It is recommended to address the problem promptly.

8. Can extreme weather conditions affect the occurrence of OBDII code P205C?

- Yes, extreme hot or cold weather conditions can sometimes affect the performance of the reductant tank temperature sensor and contribute to triggering code P205C.

9. How long does it typically take to repair OBDII code P205C?

- The repair time for OBDII code P205C can vary depending on the exact cause of the issue, but it generally takes a few hours to diagnose and fix the problem.

10. Can a DIY enthusiast repair OBDII code P205C, or is professional help recommended?

- While some individuals with automotive repair experience may be able to address OBDII code P205C on their own, it is often recommended to seek professional help to ensure the issue is properly diagnosed and repaired.

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