AutoCodes – Chevrolet – P2202 2017 Chevrolet Silverado

P2202 2017 Chevrolet Silverado Code - NOx Sensor 1 Circuit Low 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 Moderate - service should be scheduled soon. The vehicle may still be drivable for short trips if it runs normally, but avoid hard driving and repair it soon.

What it means: P2202 2017 Chevrolet Silverado indicates NOx Sensor 1 Circuit Low 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: Moderate - service should be scheduled soon.
Can I drive?: The vehicle may still be drivable for short trips if it runs normally, but avoid hard driving and repair it soon.

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Code Popularity 234

How popular is this code, among other codes? Low

Repair Importance Level

Moderate (Service soon) (2 / 3)

Repair Difficulty Level

Intermediate (2 / 3)

What is this?

Table of contents Created and updated by William Orellana on Mar 24, 2024

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P2202 2017 Chevrolet Silverado 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 P2202 2017 Chevrolet Silverado - NOx Sensor 1 Circuit Low Voltage - AutoCodes.com — P2202 2017 Chevrolet Silverado Code - NOx Sensor 1 Circuit Low Voltage

What does this mean?

What are the Possible Causes of the DTC P2202 2017 Chevrolet Silverado?

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 P2202 2017 Chevrolet Silverado?

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 P2202 2017 Chevrolet Silverado 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 P2202 2017 Chevrolet Silverado code?

Need more information on how to fix the P2202 2017 Chevrolet Silverado code? Get Access to Factory Service Manuals

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 P2202 2017 Chevrolet Silverado Code

1. What are the common symptoms of OBDII code P2202 in a 2017 Chevrolet Silverado related to the NOx Sensor 1 Circuit Low Voltage?

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

2. What are the possible causes of the NOx Sensor 1 Circuit Low Voltage issue in a 2017 Chevrolet Silverado?

- Causes can include a faulty NOx sensor, damaged wiring or connectors, issues with the exhaust system, or a malfunctioning powertrain control module (PCM).

3. How can I diagnose the NOx Sensor 1 Circuit Low Voltage problem in my 2017 Chevrolet Silverado?

- Using an OBDII scanner, you can retrieve the specific trouble code (P2202), conduct visual inspections of sensor wiring and connections, and perform diagnostic tests to pinpoint the issue.

4. Can I still drive my 2017 Chevrolet Silverado with the P2202 code related to the NOx Sensor 1 Circuit Low Voltage?

- It's generally not recommended to drive with this code present, as it can affect the vehicle's performance and emissions. It's advisable to address the issue promptly.

5. What repairs might be necessary to fix the NOx Sensor 1 Circuit Low Voltage problem on a 2017 Chevrolet Silverado?

- Repairs may involve replacing the NOx sensor, repairing or replacing damaged wiring or connectors, addressing exhaust system issues, or reprogramming the PCM.

6. Are there any DIY tips for troubleshooting the NOx Sensor 1 Circuit Low Voltage issue in my 2017 Chevrolet Silverado?

- While basic visual inspections can be done, diagnosing and repairing this issue often require specialized tools and expertise, so it's recommended to consult a professional mechanic.

7. How much does it typically cost to repair the OBDII code P2202 related to the NOx Sensor 1 Circuit Low Voltage in a 2017 Chevrolet Silverado?

- Repair costs can vary depending on the exact cause of the issue, but expenses may include parts such as a new sensor, labor costs for diagnostics and repairs, and potential fees for reprogramming the PCM.

8. Can a faulty NOx sensor cause other problems in a 2017 Chevrolet Silverado besides triggering the P2202 code?

- Yes, a faulty NOx sensor can lead to increased emissions, decreased fuel efficiency, and potential issues with passing emissions tests in addition to triggering the specific trouble code.

9. How important is it to address the NOx Sensor 1 Circuit Low Voltage problem in a 2017 Chevrolet Silverado promptly?

- It's important to address this issue promptly to ensure optimal engine performance, fuel efficiency, and emissions compliance, as ignoring it can lead to further damage and potential safety hazards.

10. Is the NOx Sensor 1 Circuit Low Voltage issue covered under warranty for a 2017 Chevrolet Silverado?

- Depending on the vehicle's warranty status, the specific terms and conditions may vary. It's advisable to check with the manufacturer or dealership to determine if the repair is covered under warranty.