Chevrolet Oxygen O2 Sensor Replacement
Last Updated on Friday Apr 20, 2018
In this guide, we will show you how to change an oxygen sensor on most Chevrolet vehicles. The difficult of changing the oxygen sensor on a Chevrolet depends on the location of the sensor that you are trying to change. All Chevrolet cars have at least two sensors with some 6 and 8 cylinder engines having up to four. After you read the fault codes you will get a code that points to a bad oxygen sensor such as Bank 1 Sensor 1. This will allow you to identify which one of the oxygen sensors need to be replaced.
- Check Engine Light is ON
- Decrease in fuel economy
- Engine Hesitation or misfire
- Rough Ideling
What you will need
Step 1: Open Hood
Park your Chevrolet, set the parking brakes and open the hood.
Step 2: Disconnect Negative Terminal
Disconnect negative battery termnail.
Step 3: Locate O2 Sensor
Locate the oxygen senosor on your Chevrolet . Do not touch the sensor or the heat shield until the engine cools down.
Step 4: Disconnect Sensor
Press the connector and pull it away to unplug the oxygen sesnor. Use a small flat head screwdriver to press the locking tab on the connector before you pull it.
Step 5: Remove O2 Sensor
Place the oxygen sensor socket on the sensor and break it loose. If the sensor cannot be loosened spray penetrating oil and let it sit for at least 10 minutes. Remove the old Chevrolet oxygen sensor.
Step 6: Install new O2 sensor
Install the new oxygen sensor. Tighten the new Chevrolet oxygen sensor to the recommended torque. If you are not sure what the correct torque is call your Chevy dealer.
Step 7: Connect wire harness
Connect the oxygen sensor wire harnes by pluging it in. If you are using an universal oxygen sensor you will need to use the diagram that came with the sensor to find out which wires to connect.
This guide applies to vehicle such as Spark, Sonic, Bolt, Volt, Cruze, Malibu, Impala, Camaro, Corvette, City Express, Trax, Equinox, Traverse, Tahoe, Suburban, Colorado, Silverado, Sonic, Blazer, Astro, HHR, Uplander, Avalanche etc.
Oxygen Sensor Fault Codes
If your check engine light is on due to oxygen sensor fault, the oxygen sensor itself may not always be the problem. You may have other problems such as bad wiring harness for example. You can read these codes yourself using an OBD-II code reader and clear them once you complete the repair.
- P0130 O2 Sensor Circuit Malfunction (Bank 1 Sensor 1)
- P0131 O2 Sensor Circuit Low Voltage (Bank 1 Sensor 1)
- P0132 O2 Sensor Circuit High Voltage (Bank 1 Sensor 1)
- P0133 O2 Sensor Circuit Slow Response (Bank 1 Sensor 1)
- P0134 O2 Sensor Circuit No Activity Detected (Bank 1 Sensor 1)
- P0135 O2 Sensor Heater Circuit Malfunction (Bank 1 Sensor 1)
- P0136 O2 Sensor Circuit Malfunction (Bank 1 Sensor 2)
- P0137 O2 Sensor Circuit Low Voltage (Bank 1 Sensor 2)
- P0138 O2 Sensor Circuit High Voltage (Bank 1 Sensor 2)
- P0139 O2 Sensor Circuit Slow Response (Bank 1 Sensor 2)
- P0140 O2 Sensor Circuit No Activity Detected (Bank 1 Sensor 2)
- P0141 O2 Sensor Heater Circuit Malfunction (Bank 1 Sensor 2)
* There may be other codes that point to a bad Oxygen Sensor.
Oxygen Sensor Torque
- 45 ~ 49 N.m (30 ~ 35 lb-ft)
These are typical values and may vary between models. Verify torque specifications by calling your dealer.
Oxygen Sensor Specifications
HO2S [Bank 1/Sensor 1]
|Heater Resistance||2.5 ~ 4.0 [20 C]|
HO2S [Bank 1/Sensor 2]
|A/F Ratio||Output Voltage(V)|
|Heater Resistance||3.3 ~ 4.1 ohm at 20 C|
Oxygen Sensor Location
Location of oxygen sensor (4-cylinder) cars
Four-cylinder engines have only one catalytic converter (Bank 1).
- Sensor Bank 1 Sensor 1 is located upstream, before the catalytic converter.
- Sensor Bank 1 Sensor 2 is located downstream, after the catalytic converter.
Location of oxygen sensor (V6) cars, SUV, VANs
V6 engines have two catalytic converters.The catalytic converter on the passenger side is often called Bank 1. The catalytic converter on the driver side is Bank 2. Upstream sensors are called sensor 1, downstream sensor are sensor 2. Verify bank locations by calling your dealer.