AutoCodes – Chevrolet – P2202 2016 Chevrolet Silverado

P2202 2016 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 2016 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 249

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 2016 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 2016 Chevrolet Silverado - NOx Sensor 1 Circuit Low Voltage - AutoCodes.com — P2202 2016 Chevrolet Silverado Code - NOx Sensor 1 Circuit Low Voltage

What does this mean?

What are the Possible Causes of the DTC P2202 2016 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 2016 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 2016 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 2016 Chevrolet Silverado code?

Need more information on how to fix the P2202 2016 Chevrolet Silverado code? Get Access to Factory Service Manuals

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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 2016 Chevrolet Silverado Code

1. What are the common symptoms of OBDII code P2202 in a 2016 Chevrolet Silverado related to the NOx Sensor 1 Circuit Low Voltage?

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

2. What are the possible causes of OBDII code P2202 in a 2016 Chevrolet Silverado indicating NOx Sensor 1 Circuit Low Voltage?

- Potential causes may include a faulty NOx sensor, damaged wiring or connectors in the sensor circuit, or issues with the engine control module.

3. How can I diagnose the NOx Sensor 1 Circuit Low Voltage issue in my 2016 Chevrolet Silverado?

- Diagnosis typically involves using an OBDII scanner to retrieve the trouble codes, inspecting the NOx sensor and its wiring for damage, and testing the sensor's output using a multimeter.

4. Are there any DIY repair tips for addressing the P2202 code related to the NOx Sensor 1 Circuit Low Voltage in a 2016 Chevrolet Silverado?

- DIY repairs may involve checking and repairing any damaged wiring or connectors, replacing the NOx sensor if necessary, and clearing the trouble codes with an OBDII scanner.

5. Can driving with OBDII code P2202 in a 2016 Chevrolet Silverado cause further damage?

- Continuing to drive with the P2202 code indicating NOx Sensor 1 Circuit Low Voltage may lead to reduced engine efficiency and potentially cause damage to other emission control components over time.

6. How much does it typically cost to repair OBDII code P2202 in a 2016 Chevrolet Silverado related to the NOx Sensor 1 Circuit Low Voltage?

- The repair cost can vary depending on the exact cause of the issue, but it may range from $200 to $500 for parts and labor at a dealership or repair shop.

7. Is it safe to ignore the OBDII code P2202 in a 2016 Chevrolet Silverado if the vehicle seems to be running fine?

- Ignoring the P2202 code indicating NOx Sensor 1 Circuit Low Voltage is not recommended, as it can lead to decreased fuel efficiency, increased emissions, and potential long-term engine damage.

8. Can a faulty NOx sensor trigger other OBDII trouble codes in a 2016 Chevrolet Silverado?

- Yes, a malfunctioning NOx sensor can sometimes trigger related trouble codes such as P2200, P2201, or other codes indicating issues with the NOx sensor system.

9. Are there any recalls or technical service bulletins related to OBDII code P2202 in a 2016 Chevrolet Silverado?

- It's recommended to check with a Chevrolet dealership or visit the manufacturer's website to inquire about any recalls or technical service bulletins related to the NOx sensor system in a 2016 Silverado.

10. How can I prevent the recurrence of OBDII code P2202 in my 2016 Chevrolet Silverado after repairing the NOx Sensor 1 Circuit Low Voltage issue?

- To prevent the code from reoccurring, ensure proper installation of any replacement NOx sensor, address any underlying wiring or connector issues, and perform regular maintenance checks on the emission control system.