How To Test The MAP Sensor (1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006 4.8L, 5.3L, 6.0L Chevrolet Silverado, Suburban, Tahoe And GMC Sierra, Tahoe, Tahoe XL)

The manifold absolute pressure (MAP) sensor, on the 1999-2006 V8 Chevrolet Silverado (Suburban, Tahoe) and GMC Sierra (Yukon, Yukon Twoscore) can be hands tested with a simple multimeter.

In this tutorial, I'll explicate how to practise information technology in a footstep-past-stride way. You'll exist able to easily find out if it'south bad (or not) in 3 unproblematic tests.

En Español You can notice this tutorial in Spanish here: Cómo Probar El Sensor MAP (1999-2006 V8 Silverado, Sierra, Suburban, Tahoe, Yukon) (at: autotecnico-online.com).

NOTE: This tutorial applies to the following vehicles:

Chevrolet:

  1. Silverado (1500, 2500):
    1. four.8L, five.3L: 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006
  2. Silverado (2500):
    1. vi.0L: 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006
  3. Suburban (1500):
    1. five.3L: 2000, 2001, 2002, 2003, 2004, 2005, 2006
  4. Suburban (2500):
    1. 6.0L: 2000, 2001, 2002, 2003, 2004, 2005, 2006
  5. Tahoe:
    1. 4.8L, 5.3L: 2000, 2001, 2002, 2003, 2004, 2005, 2006

GMC:

  1. Sierra (1500, 2500):
    1. 4.8L, 5.3L: 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006
  2. Sierra (2500):
    1. 6.0L: 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006
  3. Yukon:
    1. 4.8L, 5.3L: 2000, 2001, 2002, 2003, 2004, 2005, 2006
  4. Yukon XL (1500):
    1. 5.3L: 2000, 2001, 2002, 2003, 2004, 2005, 2006
  5. Yukon Twoscore (2500):
    1. half-dozen.0L: 2000, 2001, 2002, 2003, 2004, 2005, 2006

RELATED TROUBLE CODES:

  1. P0106 -What Does Information technology Hateful? (1999-2006 V8 Silverado, Sierra, Suburban, Tahoe, Yukon).
  2. P0107 -What Does It Mean? (1999-2006 V8 Silverado, Sierra, Suburban, Tahoe, Yukon).
  3. P0108 -What Does It Mean? (1999-2006 V8 Silverado, Sierra, Suburban, Tahoe, Yukon).

Symptoms Of A Bad MAP Sensor

A manifold absolute pressure level (MAP) sensor trouble will always cause the check engine calorie-free with 1 of the post-obit trouble codes:

  1. P0106: MAP Sensor Functioning Trouble.
  2. P0107: MAP Sensor Voltage Likewise Low.
  3. P0108: MAP Sensor Voltage Too High.

You're also going to encounter 1 or more of the following symptoms:

  1. Won't pass the country mandated emissions exam.
  2. Bad gas mileage.
  3. Lack of power, crude idle, or hesitation.
  4. Engine cranks a long time before starting.

MAP Sensor Excursion Descriptions

MAP Sensor Pin Out. How To Test The MAP Sensor (1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006 4.8L, 5.3L, 6.0L Chevrolet Silverado, Suburban, Tahoe And GMC Sierra, Tahoe, Tahoe XL)

Below are the circuit descriptions of the iii wires of the MAP sensor's connector.

Terminal Wire Clarification
A Orange with black stripe (ORG/BLK) Sensor Ground
B Light green (LT GRN) MAP Signal
C Grey (GRY) 5 Volts

Where To Buy The MAP Sensor And Save

The MAP sensor, on the 1999-2006 V8 Chevrolet Silverado (Suburban, Tahoe) and GMC Sierra (Yukon, Yukon Twoscore), is not an expensive engine management component.

The post-obit links will assistance y'all to comparing shop and hopefully save you lot a few bucks on its buy (Air conditioning-Delco is the original equipment manufacturer):

NOTE: The higher up manifold absolute force per unit area (MAP) sensor fits the following vehicles: 1999-2006 V8 Chevrolet Silverado (Suburban, Tahoe) and GMC Sierra (Yukon, Yukon Xl).

TEST ane: Testing The MAP Voltage Betoken

Testing The MAP Voltage Signal. How To Test The MAP Sensor (1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006 4.8L, 5.3L, 6.0L Chevrolet Silverado, Suburban, Tahoe And GMC Sierra, Tahoe, Tahoe XL)

To get this show on the road, we're gonna' exam the MAP voltage bespeak and run into if it decreases/increases as you lot utilize/release vacuum to the sensor.

If the MAP sensor is practiced, the MAP voltage signal should decrease when you apply vacuum to the sensor and increase when you release that vacuum.

If the MAP sensor is bad, you'll see that the MAP voltage signal will stay stuck in one value equally y'all use/release vacuum to the sensor.

IMPORTANT: The MAP sensor must remain connected to its electrical connector for this test to function properly. To exist able to access the voltage inside the signal wire, y'all'll need to employ either a back probe or a wire piercing probe. You can see an case of this tool here: Wire Piercing Probe.

Let's become started:

  1. 1

    Remove the MAP sensor from the intake manifold. If you had to disconnect the MAP sensor from it'due south electrical connector to remove it, reconnect it at present (the MAP sensor must remain connected to its connector for this test).

  2. 2

    Connect the vacuum pump to the MAP sensor's vacuum inlet port.

  3. 3

    Select Volts DC Mode on your multimeter.

  4. 4

    Connect the red multimeter test lead to the middle wire of the MAP sensor'due south connector.

    In the photo to a higher place I've identified the middle wire with the number ii.

    NOTE: The MAP sensor must remain connected to its electrical connector to test the MAP signal voltage.

  5. five

    Ground the black multimeter test pb on the bombardment negative (-) concluding.

  6. half-dozen

    Have your helper turn the fundamental On but don't kickoff the engine.

  7. seven

    You lot should see a voltage around 4.5 Volts DC registering on your multimeter. If information technology doesn't, don't worry about it just nevertheless, go on with the other steps.

  8. 8

    Apply vacuum to the MAP sensor till the approximate's needle reaches v in. Hg of vacuum. These are the approximate readings you should see every bit yous apply vacuum to the sensor:

    1.) 0 in. Hg ...... three-iv Volts.

    2.) 5 in. Hg ...... ii.4 Volts.

    three.) 10 in. Hg .... 1.9 Volts.

    4.) xv in. Hg .... 1.4 Volts.

  9. 9

    Release the vacuum you've applied. The voltage reading should go back up to the value yous registered in step 7.

Allow'south analyze your test results:

CASE 1: Equally y'all practical/released vacuum, the voltage decreased/increased. This is the correct examination result and information technology tells you that the MAP sensor is OK.

Now, if the MAP sensor trouble code won't go abroad, take a expect at the info found at: MAP Sensor Code Won't Get Abroad for a few more than suggestions as to what could exist causing the MAP sensor diagnostic problem code (DTC).

CASE 2: Equally you applied/released vacuum, the voltage DID NOT subtract/increase. This test result unremarkably confirms that the MAP sensor is bad and that it needs to be replaced.

But before yous replace it, the next pace is to make sure it's getting 5 Volts and Ground. Get to: Examination 2: Making Sure The MAP Sensor Is Getting five Volts.

Example three: The multimeter DID Not register whatever voltage. This isn't good, just doesn't condemn the manifold absolute pressure (MAP) sensor every bit bad notwithstanding.

The next exam is to make sure that the MAP sensor is getting 5 Volts. Go to: Exam 2: Making Sure The MAP Sensor Is Getting 5 Volts.