When oxygen sensor failure occurs, a DTC is recorded in the Engine Control Unit (ECU) and a Malfunction Indicator Lamp (MIL) is illuminated on the dash, alerting the driver the vehicle has a problem.

It is a moral dilemma that many shops encounter on a regular basis. It starts when a good customer comes in with the check engine light ablaze. Running your usual diagnostics, you encounter a ...

The downstream or diagnostic sensors only monitor the exhaust leaving the catalytic converter and will not cause such an issue. Other symptoms of a bad oxygen sensor include a rough idle, a misfire, ...

Are you struggling to figure out which O2 sensor or ignition coil you should replace? You are not alone! Using a diagnostic scanner can really help you troubleshoot a car’s issues efficiently, but ...

We earn commissions from purchases you make using links in our articles. Learn more. If your car experiences poor fuel economy, lacks power, feels sluggish, idles rough, or has an illuminated check ...

Sometimes the Check Engine Light can come on without any other symptoms occurring. While it can be tempting to keep driving, it’s important to stop and see what’s going on. It’s very possible that ...