AutoCodes – Buick – P2207 Buick

P2207 Buick Code - NOx Sensor 1 Heater Control Circuit High Voltage

Quick Answer

The Nitrogen Oxides (NOx) sensors are part of the selective catalytic reduction system, a device used to reduce NOx emission on diesel engines. Common causes include Faulty Nitrogen Oxides (NOx) Sensor, Nitrogen Oxides Sensor harness is open or shorted, Nitrogen Oxides 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: P2207 Buick indicates NOx Sensor 1 Heater Control Circuit High Voltage.
Common causes: Common causes include Faulty Nitrogen Oxides (NOx) Sensor, Nitrogen Oxides Sensor harness is open or shorted, Nitrogen Oxides 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 506

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 Mar 29, 2024

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P2207 Buick Description

The Nitrogen Oxides (NOx) sensors are part of the selective catalytic reduction system, a device used to reduce NOx emission on diesel engines. There are two NOx sensors, one placed upstream of selective catalytic reduction, to measure inlet NOx concentration, and one placed downstream. They are connected with the control module via CAN and all the information is exchanged through it. Since it is a smart sensor, all the electrical monitoring is performed inside the sensor and only the results are sent to the Engine Control Module (ECM). Each NOx sensor contains a sensing cell, a pumping cell, and a heater. A sample of exhaust gas passes through a diffusion gap between the sensing cell and the pumping cell. The NOx sensor maintains a constant reference voltage across the sensing cell. An electronic circuit within the sensor controls the pump current through the pumping cell in order to maintain a constant voltage in the sensing cell. The amount of current required to maintain the reference voltage in the sensing cell is proportional to the concentration of NOx in the exhaust. The ECM varies the amount of diesel exhaust fluid (reductant) added by varying the reductant injector duty cycle in response to changes in engine exhaust NOx levels. The smart NOx sensors consist of two components, the NOx module and the NOx sensor element that are serviced as a unit. A circuit or performance condition with a NOx sensor is detected by the NOx sensor module. The smart NOx sensor module communicates the condition to the ECM over the serial data line. The ECM sets a DTC when a serial data message is received from the NOx sensor module. The Diagnostic Trouble Code (DTC) will be set if the ECM software detects a fault in the NOx sensor circuitry or a performance fault in the NOx sensor for greater than 2 s.

OBDII Code P2207 Buick - NOx Sensor 1 Heater Control Circuit High Voltage - AutoCodes.com — P2207 Buick Code - NOx Sensor 1 Heater Control Circuit High Voltage

What does this mean?

What are the Possible Causes of the DTC P2207 Buick?

Faulty Nitrogen Oxides (NOx) Sensor
Nitrogen Oxides Sensor harness is open or shorted
Nitrogen Oxides Sensor circuit poor electrical connection

How to Fix the DTC P2207 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 P2207 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 P2207 Buick code?

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Need Help with the 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 P2207 Buick Code

1. What are common symptoms of OBDII code P2207 in a Buick related to the NOx Sensor 1 Heater Control Circuit High Voltage?

- Common symptoms include poor engine performance, decreased fuel efficiency, and illumination of the Check Engine Light.

2. What could cause the NOx Sensor 1 Heater Control Circuit High Voltage error code P2207 in a Buick?

- The code P2207 can be triggered by issues such as a faulty NOx sensor, damaged wiring, a malfunctioning heater control circuit, or a problem with the engine control module.

3. Can driving with the OBDII code P2207 Buick NOx Sensor 1 Heater Control Circuit High Voltage be harmful?

- Continuing to drive with this code may lead to increased emissions, reduced engine efficiency, and potential damage to the catalytic converter over time.

4. How can I diagnose and repair the NOx Sensor 1 Heater Control Circuit High Voltage issue in my Buick?

- Diagnosis typically involves checking the NOx sensor and related wiring for continuity, resistance, and proper voltage. Repair may involve replacing the NOx sensor, repairing damaged wiring, or addressing issues with the heater control circuit.

5. Is it safe to reset the Check Engine Light after receiving the P2207 code in a Buick?

- It is recommended to diagnose and resolve the underlying issue causing the P2207 code before resetting the Check Engine Light to ensure the problem is properly addressed.

6. Can a DIY enthusiast fix the NOx Sensor 1 Heater Control Circuit High Voltage problem in a Buick?

- Depending on the individual's skill level and access to tools, some DIY enthusiasts may be able to diagnose and repair the issue themselves, but it is recommended to consult a professional if unsure.

7. Will replacing the NOx sensor resolve the P2207 code in a Buick?

- In some cases, replacing the NOx sensor may resolve the P2207 code, but it is essential to properly diagnose the issue to ensure the correct repair is performed.

8. How can I prevent the OBDII code P2207 related to the NOx Sensor 1 Heater Control Circuit High Voltage in my Buick?

- Regular maintenance, timely repairs, and addressing any engine performance issues promptly can help prevent the occurrence of the P2207 code in your Buick.

9. Are there any recalls or technical service bulletins related to the P2207 code in Buick vehicles?

- It is advisable to check with a Buick dealership or visit the manufacturer's website to see if there are any recalls or technical service bulletins related to the P2207 code in your specific Buick model.

10. How much does it typically cost to repair the NOx Sensor 1 Heater Control Circuit High Voltage issue in a Buick?

- The cost of repairing the P2207 code can vary depending on the specific cause of the issue, parts needed, and labor costs. It is recommended to obtain estimates from reputable mechanics or dealerships for an accurate cost assessment.