P0107 MAP Sensor Code Explained (1996-2009 3.8L V6 Chrysler, Dodge, And Plymouth Minivan)

  • By: Abraham Torres-Arredondo
  • Created: 07 July 2025
  • Updated: 07 July 2025
  • Articl Id: 1107
P0107 MAP Sensor Code Explained (2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009 3.8L V6 Chrysler, Dodge And Plymouth Minivan)

In this tutorial, I'll break down what a P0107 MAP Sensor Voltage Low code really means, what symptoms to expect, what usually causes it, and whether it's smarter to replace the sensor or test it first.

The PCM sets this code when it sees a MAP sensor signal that's lower than expected —usually due to sensor failure, a wiring issue, or a missing 5 Volt supply.

Since the MAP sensor directly affects fuel delivery and engine load calculations, a faulty signal can cause hesitation, rough running, poor acceleration, or even limp mode.

By the end, you'll know exactly what steps to take to troubleshoot and resolve the issue.

Contents of this tutorial:

APPLIES TO: This tutorial applies to the following vehicles:

  • 3.8L V6 Chrysler Town & Country: 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009.
  • 3.8L V6 Dodge Caravan: 1996, 1997, 1998, 1999, 2000, 2001.
  • 3.8L V6 Dodge Grand Caravan: 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2004, 2005, 2006, 2007, 2008, 2009.
  • 3.8L V6 Plymouth Voyager: 1996.
  • 3.8L V6 Plymouth Grand Voyager: 1996, 1997, 1998, 1999.

MAP SENSOR MULTIMETER TESTS:

OTHER MAP SENSOR TROUBLE CODES EXPLAINED:

What Does P0107 Really Mean?

When code P0107 shows up on your scan tool, you might see a generic description —or a Chrysler-specific one for your 1996–2009 3.8L V6 minivan:

  • Generic OBD II Definition: P0107 –Manifold Absolute Pressure/Barometric Pressure Circuit Low Input.
  • Chrysler Definition: P0107 –MAP Sensor Voltage Too Low.

Put simply, P0107 means the PCM (engine computer) is seeing a MAP sensor signal that's too low —usually stuck below 0.25 Volts when it should be higher.

That's a problem, because the PCM depends on the MAP sensor to read intake manifold pressure and figure out how hard the engine's working.

Under normal conditions, you'll see around 1.0 to 1.5 Volts at idle (high vacuum). As you accelerate and vacuum drops, the voltage should rise —up to about 4.5 Volts at wide open throttle.

When this code sets, the PCM is getting a voltage that's pinned near zero —even when you're driving and it should be climbing.

This low reading throws everything off. It tells the PCM the engine isn't working hard, even when it is —like when you're pulling away from a stoplight, cruising uphill, or running the A/C with passengers on board.

If the PCM can't trust the MAP signal, it may switch to a backup strategy —tweaking fuel trim and spark timing in ways that hurt performance and driveability.

In the next section, I'll show you what symptoms to expect when this code pops up and what it feels like behind the wheel.

Common Symptoms Of A Code P0107

When your 3.8L V6 Chrysler, Dodge, or Plymouth minivan sets a P0107 MAP Sensor Voltage Low code, engine performance is already definitely letting you know something's off. Since the PCM relies on the MAP sensor to control fuel and spark, a bad signal almost always affects how the engine runs.

Here are the symptoms you're most likely to notice:

  • Check engine light turns on.
  • Long crank times or trouble starting the engine.
  • Stalls at idle or runs rough at low speeds.
  • Hesitation or stumble when accelerating.
  • Drop in fuel mileage.
  • Loss of power or the engine stuck in "limp mode".

These issues may be constant or come and go —especially if the problem is caused by a sensor that's just beginning to fail. Either way, the root problem is that the PCM isn't getting the right vacuum signal, so it's doing its best to adjust on the fly.

Next, I'll walk you through what actually causes a P0107 MAP sensor code.

What Causes Code P0107?

As we previously discussed, a P0107 MAP Sensor Voltage Low code means the PCM is seeing a signal from the MAP sensor that's way below what it should be —usually under 0.2 Volts— while the engine is running.

Quite a few problems that can trigger this code. Here are the most common ones on these 3.8L minivans:

  • A failed MAP sensor that's stuck putting out a low voltage.
  • An open-circuit in the MAP signal wire.
  • A short-to-Ground in the same signal wire.
  • Connector problems —like corrosion on the terminals or a broken locking tab.
  • Dry-rot and peeling wire insulation near the connector (common on high-mile vans).
  • Oil fouling inside the MAP sensor from blow-by in the intake manifold.
  • Vacuum leaks from worn-out intake gaskets messing with pressure readings.
  • Another sensor shorting out the shared 5 Volt reference circuit.
  • A faulty PCM (rare, but not impossible).

One of the first steps, in diagnosing a P0107 code, is testing the MAP sensor's signal wire, its power supply, and its Ground. The good news? You can do all of that with a basic multimeter and a handheld vacuum pump —no fancy diagnostic tools required.

I'll walk you through each test step by step in these guides:

Up next, I'll help you decide whether you should replace the sensor right away or take a few minutes to test it and know for sure.

Should You Replace The MAP Sensor?

When a P0107 MAP sensor voltage low code shows up on your 1996–2009 3.8L V6 Chrysler, Dodge, or Plymouth minivan, it's tempting to go straight to replacing the sensor and hope that solves it. And to be fair? In many cases, it does.

Plenty of repair shops do exactly that. What makes this strategy appealing is the fact that the sensor is easy to access and the part isn't too pricey. If you're thinking of going that route, here are replacement MAP sensors from known automotive brands I've had good results with:

1996-2000:

2001-2003:

2004-2009:

(Buying through the link above helps support this site —at no extra cost to you. I truly appreciate it!)

But if you're the kind of DIYer who prefers to be sure before spending money on parts, I respect that. I always recommend testing first, especially since it's quick and easy.

You don't need a scan tool or pro-level gear. Just a multimeter, a vacuum pump, and a few minutes of your time is all it takes to get a clear answer.

Want to test it and know for sure before you replace it? Start with this step-by-step tutorial I put together for your exact engine:

More 3.8L V6 Chrysler, Dodge, And Plymouth Minivan Diagnostic Tutorials

If you're working on your 3.8L V6 equipped minivan and want clear, step-by-step help, this index of tutorials is a great place to start. I put them together to make the diagnostic process easier and less frustrating.

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