GM 3.8L Index of Articles

NOTE: See vehicle application below: Here is the typical and simplified fuel injector wiring diagram for the following vehicles: 1995 3.8L Buick LeSabre. 1995 3.8L... [read more]

In a nutshell, a P0101: MAF Sensor System Performance Problem tells you that there's a problem with the MAF signal the MAF sensor is sending the fuel injection computer. If... [read more]

Catalytic converters don't last forever and when they fail, the fuel injection computer is going to light up the check engine light with a P0420: Catalyst System Efficiency... [read more]

One of the most common issues causing engine performance and emissions problems on the 3.8L V6 engine are vacuum leaks. So if you've got the check engine light set by an... [read more]

A P0440: Evaporative Emission Control System Malfunction is probably one of the most commonly encountered trouble codes out there, since it's usually caused by a loose or... [read more]

In a nutshell, a P0102: MAF Sensor Circuit Low Frequency tells you that the MAF sensor is stuck producing a low frequency signal. In this tutorial, I'll go into detail what... [read more]

Troubleshooting a diagnostic trouble code (DTC) P0141: HO2S Heater Circuit Sensor 2 on your 3.8L GM vehicle is not that hard. It's something that the DIY'er can do without... [read more]

In a nutshell, a P0122: Throttle Position Sensor Circuit Low Voltage lets you know that the throttle position sensor is not behaving according to the pre-programmed... [read more]

The oxygen sensor on the 1993 3.8L equipped GM vehicles is a 3 wire sensor. In this tutorial, I'll show you how to test it's internal heater with a simple multimeter. You... [read more]

NOTE: See vehicle application below: This simplified ignition system wiring diagram applies to the following vehicles: 1995 3.8L Buick LeSabre. 1995 3.8L Buick... [read more]