AutoCodes – GMC – P206B GMC

P206B GMC Code - Reductant Quality Sensor Circuit Performance

Quick Answer

The Reductant Quality Sensor is located in the reductant tank and uses an ultrasonic signal to measure reductant fluid quality. Common causes include Faulty Reductant Quality Sensor, Reductant Quality Sensor harness is open or shorted, Reductant Quality Sensor 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: P206B GMC indicates Reductant Quality Sensor Circuit Performance.
Common causes: Common causes include Faulty Reductant Quality Sensor, Reductant Quality Sensor harness is open or shorted, Reductant Quality Sensor 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 959

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

What is this?

Table of contents Created and updated by William Orellana on Jul 26, 2021

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P206B GMC Description

The Reductant Quality Sensor is located in the reductant tank and uses an ultrasonic signal to measure reductant fluid quality. The reductant quality sensor includes an integrated temperature sensor to measure reductant fluid temperature. The Reductant Quality Sensor communicates with the Reductant Control Module using serial data. The Diagnostic Trouble Code (DTC) will be set Reductant Control Module detects a performance fault on the Reductant Quality Sensor for greater than 5 min.

OBDII Code P206B GMC - Reductant Quality Sensor Circuit Performance - AutoCodes.com — P206B GMC Code - Reductant Quality Sensor Circuit Performance

What does this mean?

What are the Possible Causes of the DTC P206B GMC?

Faulty Reductant Quality Sensor
Reductant Quality Sensor harness is open or shorted
Reductant Quality Sensor circuit poor electrical connection

How to Fix the DTC P206B GMC?

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 P206B GMC 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 P206B GMC Code

1. What are common symptoms of OBDII code P206B GMC?

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

2. What does the OBDII code P206B GMC indicate?

- The code P206B indicates an issue with the Reductant Quality Sensor Circuit Performance in a GMC vehicle.

3. What are possible causes of OBDII code P206B GMC?

- Possible causes include a faulty reductant quality sensor, wiring issues in the sensor circuit, or a problem with the engine control module.

4. How can I diagnose OBDII code P206B GMC?

- Diagnosis typically involves using a scan tool to read the code, checking the reductant quality sensor and its wiring for faults, and performing testing as per the manufacturer's guidelines.

5. Can I drive my vehicle with OBDII code P206B GMC?

- It is not recommended to drive the vehicle with this code present, as it can lead to further engine damage and may cause the vehicle to fail emissions tests.

6. How can I repair OBDII code P206B GMC?

- Repair options include replacing the faulty reductant quality sensor, repairing any damaged wiring, or reprogramming the engine control module as needed.

7. Are there any DIY tips for fixing OBDII code P206B GMC?

- DIY tips include checking the sensor connections for corrosion, ensuring proper sensor alignment, and conducting a visual inspection of the sensor and its wiring.

8. Can a mechanic reset the OBDII code P206B GMC after repairing?

- Yes, a mechanic can reset the code using a scan tool after the necessary repairs have been completed.

9. How much does it cost to repair OBDII code P206B GMC at a dealership?

- Repair costs at a dealership can vary but may include diagnostic fees, parts replacement costs, and labor charges, which can add up to several hundred dollars.

10. How long does it take to repair OBDII code P206B GMC?

- The time needed for repairs depends on the exact cause of the issue, but it typically takes a few hours to a full day to diagnose and fix the problem.