AutoCodesChevrolet – P205C Chevrolet

P205C Chevrolet 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 Chevrolet 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 1,857
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 Chevrolet 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 Chevrolet - Reductant Tank Temperature Sensor Circuit Low Voltage - AutoCodes.com
P205C Chevrolet Code - Reductant Tank Temperature Sensor Circuit Low Voltage

What are the Possible Causes of the DTC P205C Chevrolet?

  • 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 Chevrolet?

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 Chevrolet 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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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 Chevrolet Code

1. What does the OBDII code P205C mean on a Chevrolet?

P205C indicates a low voltage issue in the reductant tank temperature sensor circuit, which monitors the temperature of the Diesel Exhaust Fluid (DEF) in the tank.

2. What are the symptoms of code P205C on a Chevrolet?

Symptoms may include a Check Engine Light, DEF system warning messages, reduced engine performance, and potential issues with the vehicle's emissions system.

3. What causes the P205C code on a Chevrolet?

Common causes include a faulty reductant tank temperature sensor, wiring or connector issues, low DEF levels, or a failed reductant control module.

4. Can I still drive my Chevrolet with the P205C code?

You can drive the vehicle, but it may enter reduced power mode if the DEF system malfunctions. Addressing the issue promptly is recommended to avoid further problems.

5. How do I diagnose the P205C code on a Chevrolet?

Diagnose by inspecting the reductant tank temperature sensor and its wiring for damage, checking for corrosion at connectors, and testing the sensor’s voltage output with a multimeter.

6. How do I fix the P205C code on a Chevrolet?

Repairs may involve replacing the reductant tank temperature sensor, repairing damaged wiring or connectors, and ensuring the DEF tank is filled with quality DEF fluid.

7. How much does it cost to fix the P205C code on a Chevrolet?

Repair costs can range from $100 to $500 depending on whether the issue is a sensor replacement, wiring repair, or module replacement.

8. Can a low DEF level cause the P205C code on a Chevrolet?

Low DEF levels typically won't directly cause this code but can contribute to related issues in the DEF system. Ensure the tank is adequately filled.

9. Will clearing the code fix the P205C issue on a Chevrolet?

Clearing the code temporarily removes the warning, but the root cause must be resolved to prevent the code from returning.

10. What tools are needed to fix the P205C code on a Chevrolet?

You'll need an OBDII scanner, a multimeter for voltage testing, and basic tools for inspecting and replacing components in the reductant system.

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