AutoCodes – Cadillac – P206D Cadillac

P206D Cadillac Code - Reductant Quality Sensor Circuit High Voltage

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: P206D Cadillac indicates Reductant Quality Sensor Circuit High Voltage.
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 388

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 P206D Cadillac 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 that the Reductant Quality Sensor signal is out of range high for
greater than 5 s.

OBDII Code P206D Cadillac - Reductant Quality Sensor Circuit High Voltage - AutoCodes.com — P206D Cadillac Code - Reductant Quality Sensor Circuit High Voltage

What does this mean?

What are the Possible Causes of the DTC P206D Cadillac?

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

How to Fix the DTC P206D Cadillac?

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 P206D Cadillac 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 P206D Cadillac Code

1. What are the common symptoms of OBDII code P206D in a Cadillac related to the Reductant Quality Sensor Circuit High Voltage?

- Common symptoms may include the Check Engine Light illuminating, reduced engine performance, and possible issues with the vehicle's emissions system.

2. What are the possible causes of the P206D code in a Cadillac?

- The code P206D can be caused by issues such as a faulty reductant quality sensor, wiring issues in the sensor circuit, or a problem with the engine control module.

3. How serious is the P206D code in a Cadillac?

- While the code itself may not cause immediate harm to the vehicle, it can lead to increased emissions and potential performance issues if left unaddressed for an extended period of time.

4. How can I diagnose the P206D code in my Cadillac?

- Diagnosis typically involves using an OBDII scanner to read the code, checking the wiring and connections related to the reductant quality sensor, and testing the sensor itself for proper function.

5. Can I continue driving my Cadillac with the P206D code present?

- It is generally not recommended to continue driving with the P206D code active, as it can lead to further issues with the vehicle's emissions system and performance.

6. Are there any simple repairs I can try to fix the P206D code in my Cadillac?

- Simple repairs may include checking and cleaning the sensor connections, inspecting for any visible wiring issues, and resetting the code to see if it reoccurs.

7. Is it necessary to take my Cadillac to a mechanic for the P206D code?

- While some simple repairs can be attempted by DIY enthusiasts, it is advisable to have a professional mechanic diagnose and repair the underlying issue causing the P206D code.

8. How much does it typically cost to repair the P206D code in a Cadillac?

- The cost of repairs for the P206D code can vary depending on the exact cause of the issue, but it may range from a few hundred to a thousand dollars, including parts and labor.

9. Can the P206D code in a Cadillac be prevented?

- Regular maintenance and inspections of the vehicle's emissions system, including the reductant quality sensor, can help prevent issues that may trigger the P206D code.

10. How long does it usually take to repair the P206D code in a Cadillac?

- The repair time for the P206D code can vary based on the complexity of the issue, but it may take a few hours to a day for a mechanic to diagnose and fix the problem.