Common questions

How many O2 sensors are in a Chevy Silverado?

How many O2 sensors are in a Chevy Silverado?

There are two types of O2 sensors on your vehicle: upstream and downstream sensors. They essentially serve the same purpose, but are located in the different parts of your Silverado. The downstream oxygen sensor is located behind your catalytic converter.

What does a truck do when the oxygen sensor is bad?

If your vehicle has a bad oxygen sensor, it could run irregularly or sound rough when it idles. A faulty oxygen sensor can impact your engine’s timing, combustion intervals, and other essential functions. You could also notice stalling or slow acceleration.

How much is an O2 sensor for a Chevy Silverado?

Chevrolet Silverado 1500 Oxygen Sensor Replacement Cost Estimate. Labor costs are estimated between $46 and $58 while parts are priced between $322 and $346.

How can you tell which O2 sensor is bad?

Several of the most obvious signs that the oxygen sensor is failing include:

  1. Reduced gas mileage.
  2. A bad smell like rotten eggs coming from the exhaust.
  3. The check engine light comes on.
  4. You notice that your engine idles roughly.
  5. The car is suddenly hard to start.

Where are the O2 sensors?

The oxygen sensor helps keep that balance in check. The sensor is typically located on the passenger side of the car, mounted directly onto the exhaust pipe near the catalytic converter. When the sensor goes bad, your car may lose up to 40 percent of its fuel efficiency, because your car will use too much gas.

Can you clean O2 sensors?

There are no true oxygen sensor cleaners that are safe to put through your engine. While some people choose to remove them and use a wire brush or an aerosol cleaner to remove deposits, we do not recommend trying to clean O2 sensors.

When to replace the oxygen sensor in a Chevy Silverado?

The emissions control system plays a vital role in maintaining engine performance, and a Chevrolet Silverado oxygen sensor is a key piece of that puzzle. AutoZone recommends checking and replacing the oxygen sensors when you notice your fuel economy dipping or the check engine light turning on.

How does the O2 sensor work on a truck?

O2 sensors measure the oxygen levels in your truck’s exhaust gas before and after passing through the catalytic converter. By measuring the amount of oxygen leftover after engine combustion, the truck’s on-board computer can adjust the air-to-fuel ratio accordingly.

How does the zirconia O2 sensor work on a Silverado?

They operate by sending a voltage that measures how much oxygen is being burnt. When that level changes so too will the voltage, signaling your vehicle’s ECU. Voltage on zirconia sensors drops 0.2 volts when a lean mixture is detected and jumps 0.9 volts when it detects a rich mixture.

What to do if your O2 sensor is bad?

The trouble codes associated with the OBDII scan will reveal which sensor is at fault and why it is bad (at least what the computer thinks is wrong). It is very rare for there to be a problem with an oxygen sensor, and not have the check engine light come on. Here are the most common symptoms of a bad oxygen sensor in your Silverado: