On some occasion, if you have a mass sensor code and you try to service the mass sensor, the fault code could be fixed and the engine light could go away. What happen if the servicing does not work? Here is a quick way you can check it using your DVOM voltage meter:

Using a wiring diagram, determine the signal wire of the mass sensor. Example, if you have 4-5 wires on the sensor, one of them will be a signal wire. So how do you find it without a wiring diagram? Well…if you measure each of the wire, one of them will change voltage reading if you rev up the engine speed from idle to high idle. If one of them changes, that is the one. If none of them changes, then the sensor is at fault. Of course if you have the diagram, you can pinpoint the signal wire right away and trace the wiring up to the ecm pin terminal for continuity. For more details, contact ATS.

Thanks!

This entry was posted on Saturday, March 15th, 2008 at 1:20 pm and is filed under Check Engine Light FIXES. You can follow any responses to this entry through the RSS 2.0 feed. You can leave a response, or trackback from your own site.