GM 3.8L Index of Articles

P0102 -What Does It Mean? (1996-1999 3.8L V6 Buick, Chevrolet, Pontiac, Olds)

P0102 -What Does It Mean? (1996-1999 3.8L V6 Buick, Chevrolet, Pontiac, Olds)

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 this trouble code means -all in plain English. I'll also talk about some...   read more >>

P0122 -What Does It Mean? (1995-1999 3.8L V6 Buick, Chevrolet, Pontiac, Olds)

P0122 -What Does It Mean? (1995-1999 3.8L V6 Buick, Chevrolet, Pontiac, Olds)

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 parameters stored in the fuel injection computer. In this tutorial I'll explain...   read more >>

3-Wire Oxygen Sensor Heater Test (1993 3.8L V6 GM)

3-Wire Oxygen Sensor Heater Test (1993 3.8L V6 GM)

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 don't need any expensive diagnostic test equipment and with the 3 basic...   read more >>

Ignition System Wiring Diagram (1995 3.8L Buick, Oldsmobile, Pontiac)

Ignition System Wiring Diagram (1995 3.8L Buick, Oldsmobile, Pontiac)

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 Park Avenue. 1995 3.8L Buick Riviera. 1995 3.8L...   read more >>

How To Test The MAF Sensor Diagnosing Codes: P0100, P0101, P0102, P0103

How To Test The MAF Sensor Diagnosing Codes: P0100, P0101, P0102, P0103

In this test tutorial, I'll show you how to test the Mass Air Flow Sensor to see if it's bad (and lighting up the check engine light) or not. This MAF Test is done in 3 easy steps. All you'll need, to test the MAF Sensor (with this tutorial) is a...   read more >>

P0420 -What Does It Mean? (1996-1999 3.8L V6 Buick, Chevrolet, Pontiac, Olds)

P0420 -What Does It Mean? (1996-1999 3.8L V6 Buick, Chevrolet, Pontiac, Olds)

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 Below Threshold diagnostic trouble code. In this article I'll explain...   read more >>

How To Test The GM EGR Valve Buick, Chevy, Olds, Pontiac

How To Test The GM EGR Valve Buick, Chevy, Olds, Pontiac

This type of EGR valve has made the auto repair industry and GM a ton of money over the years, since it's prone to carbon blockage. Well the good news is that this is an EGR Valve and EGR Valve System that is very easy to test and diagnose and this...   read more >>

P0440 -What Does It Mean? (1996-1999 3.8L V6 Buick, Chevrolet, Pontiac, Olds)

P0440 -What Does It Mean? (1996-1999 3.8L V6 Buick, Chevrolet, Pontiac, Olds)

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 missing gas cap. In this tutorial I'll shed some light on what this...   read more >>

How To Test The Alternator With A Multimeter (GM 3.8L)

How To Test The Alternator With A Multimeter (GM 3.8L)

Testing the alternator, to see if it’s the cause of your 3.8L GM vehicle’s No Charge Condition, is something that you can do in three easy tests. This article will show you how in a step-by-step fashion. All you need is a multimeter. This article... read more >> (at: troubleshootmyvehicle.com)

Rear Oxygen Sensor Heater Test -P0141 (1996-2003 3.8L GM)

Rear Oxygen Sensor Heater Test -P0141 (1996-2003 3.8L GM)

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 too much trouble. In this tutorial I'll show you the 3 basic multimeter...   read more >>