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P2202 Chevrolet Code - NOx Sensor 1 Circuit Low Voltage

Quick Answer

The P2202 Chevrolet code refers to an issue with the NOx (Nitrogen Oxide) sensor 1 circuit in the vehicle. Common causes include Faulty NOx sensor, Wiring issues, ECM malfunction. 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 Chevrolet indicates NOx Sensor 1 Circuit Low Voltage.
Common causes
Common causes include Faulty NOx sensor, Wiring issues, ECM malfunction.
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.
What is this?
Table of contents Created and updated by William Orellana on Sep 09, 2024
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Code P2202 Chevrolet Description

The P2202 Chevrolet code refers to an issue with the NOx (Nitrogen Oxide) sensor 1 circuit in the vehicle. NOx sensors are responsible for monitoring the levels of nitrogen oxide in the exhaust gases and sending this information to the engine control module (ECM). The ECM uses this data to adjust the air-fuel mixture to reduce emissions and improve fuel efficiency. When the NOx sensor 1 circuit is reporting low voltage, it indicates a problem with the sensor's ability to accurately measure the NOx levels in the exhaust gases.

OBDII Code P2202 Chevrolet - NOx Sensor 1 Circuit Low Voltage
P2202 Chevrolet Code - NOx Sensor 1 Circuit Low Voltage

Common Causes of P2202 Chevrolet

  1. Faulty NOx sensor
  2. Wiring issues
  3. ECM malfunction
  4. Exhaust system leaks
  5. Poor quality fuel

Symptoms of P2202 Chevrolet

  1. Check engine light illuminated
  2. Poor fuel efficiency
  3. Failed emissions test
  4. Reduced engine performance
  5. Increased emissions

How to Fix P2202 Chevrolet

  1. Use an automotive diagnostic scanner to retrieve the trouble codes and identify the specific issue with the NOx sensor 1 circuit.
  2. Inspect the wiring harness and connections for any signs of damage or corrosion. Repair or replace as necessary.
  3. Test the NOx sensor's voltage output to determine if it is functioning correctly. Replace the sensor if it is faulty.
  4. Check the ECM for any signs of malfunction or software issues. Update or replace the ECM if necessary.
  5. Verify that the exhaust system is leak-free and properly sealed to prevent false readings from the NOx sensor.

Cost to Fix P2202 Chevrolet

The typical repair costs for addressing a NOx sensor 1 circuit low voltage issue can vary depending on the specific cause of the problem and the cost of parts and labor. On average, the repair costs can range from $200 to $500, including the cost of a new NOx sensor, wiring repairs, and any necessary diagnostic testing. However, it's important to note that labor rates at auto repair shops can vary significantly based on location, vehicle make and model, and other factors. It's recommended to obtain a detailed estimate from a trusted auto repair shop to get an accurate idea of the total repair costs.

What does this mean?

Tech Notes for P2202 Chevrolet

There is a Factory Service Bulletin for the following Chevrolet models:

2010 Chevrolet Express

2011 Chevrolet Express

2011 Chevrolet Silverado

Chevrolet Factory Service Bulletin OBDII Code P2202

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Information for Specific Chevrolet Models

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.

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