Reply to thread

This site may earn a commission from merchant affiliate links, including eBay, Amazon, and others.

Message: <blockquote data-quote="vzhq16" data-source="post: 1468261" data-attributes="member: 98379"><p>A CEL is only triggered by engine sensors. Not headlights, not a windshield motor and not a headlight assembly. If you ran the engine with the O2 sensor disconnected, that would set a code. If it's a "hard" code ie: the problem is still a problem as seen by the ECU, the light will remain lit. If it's now history or a "soft" code, the ECU will reset the light after several key cycles (I forget the exact number). You can manually reset any codes using an ALDL reader tool. I use an adapter cable and the same ALDL "dongle" that I use on my car. The "dongle" connects to my phone via Bluetooth and I have the Torque Pro app on the phone to read codes as well as reset them. If the problem that caused the code has been resolved, the light will be off. If the code gets reset, the light will still light.</p></blockquote><p></p>