Question about 2003 GMC Envoy

1 Answer

Will unplugging the map sensor reset the code errors?

Posted by on

Ad

1 Answer

  • Level 1:

    An expert who has achieved level 1.

  • Contributor
  • 3 Answers

No disconnect the battery for 3 min

Posted on Feb 07, 2012

Ad

1 Suggested Answer

6ya6ya
  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

Hi,
a 6ya expert can help you resolve that issue over the phone in a minute or two.
Best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
the service is completely free and covers almost anything you can think of.(from cars to computers, handyman, and even drones)
click here to download the app (for users in the US for now) and get all the help you need.
Goodluck!

Posted on Jan 02, 2017

Ad

Add Your Answer

Uploading: 0%

my-video-file.mp4

Complete. Click "Add" to insert your video. Add

×

Loading...
Loading...

Related Questions:

2 Answers

2001 olds alero po108


code p 0108 refers to manifold absolute pressure(MAP) sensor / barometric pressure (BARO) sensor ---high input===causes ---wiring short to positive--MAP sensor ---BARO sensor --- ECM

Sep 28, 2016 | Cars & Trucks

1 Answer

I have 2003 model polo 1.4 highline motor lamp lights and error code: P 1553. Map sensor can help you what the error is


code p 1553 refers to manifold absolute pressure (MAP)/barometric pressure (BARO) sensor --range performance===causes intake /exhaust leak--EGR system---EVAP canister purge valve ---throttle control unit --wiring---MAP sensor ---BARO sensor
as you can see from the list of possible causes for code p 1553 the MAP sensor is not the only possible fault

Nov 24, 2015 | Cars & Trucks

1 Answer

How did engine idle too low?i come across dtc p0105 related to map sensor.engine check light display on mitsubishi pajero/gdi engine


I'm not sure I understand your question. When I first read it I thought you were saying you had an error code that the engine idle is low, but the error code you've given is for a MAP sensor problem which you mentioned in your post also. I'm going to guess that you've observed the low idle yourself, and when you ran the diagnostics the engine computer was complaining of a bad MAP sensor signal. This is triggered when the engine computer sees a change in another sensor that should correlate with a certain change in the MAP sensor, but the MAP sensor signal doesn't change as expected. Idle problems are a possible symptom of a bad MAP sensor, so this is not unreasonable. What your engine is telling you is that you should check the MAP sensor and its related wiring and hose connections to try to find your problem. If you fix the problem with the MAP sensor then your idle may start working properly again.

Feb 11, 2015 | 1992 Mitsubishi Pajero

1 Answer

Code po105 pops up i had it reset and every 3-4 days it lights back up what does it mean ?


Generic code results from http://www.obd-codes.com/p0105 :

P0105 - MAP Circuit Malfunction

Manifold Absolute Pressure/Barometric Pressure Circuit Malfunction

The MAP (Manifold Absolute Pressure) sensor is part of the fuel management system. It reacts to changes in engine manifold pressure. The PCM (Powertrain Control Module) monitors the MAP sensor continually to properly run the engine. Changes in engine load require changes in the amount of fuel injected, and timing of the ignition system, etc. An engine under load has more manifold pressure(or less vacuum) than an engine that is coasting. As the load changes, the MAP sensor voltage signal to the PCM changes accordingly. To check the MAP sensor operation, though, the PCM watches other sensors to verify that the MAP sensor is working properly.

For example, the PCM compares the TPS (Throttle Position Sensor) signal to the MAP signal to verify the MAP signal isn't "sticking". If the PCM doesn't see a MAP sensor change immediately follow a change in the throttle pedal sensor, it knows there is a problem with the MAP sensor and sets P0105. Or, if the PCM notices that the TPS indicates the engine is under load, but the MAP signal indicates that the engine is "coasting" it, again, knows there is a problem with the MAP sensor or TPS and sets P0105.

FB.init("dd7d9e9681341cde77587bc6a2029f6f"); OBD-Codes.com on Facebook


Symptoms of a P0105 check engine light code may include:

  • Poor running engine
  • Engine runs rich
  • Engine won't idle
  • Engine backfires through tailpipe
  • Engine misfire under load or at idle
  • MIL (Malfunction Indicator Lamp) illumination
  • In some extreme cases there may be no symptoms other than MIL illumination

A P0105 DTC could be caused by:

  • MAP sensor vacuum hose disconnected or plugged
  • Bad MAP sensor
  • Bad TPS
  • Damaged or problematic MAP sensor connector
  • Damaged or problematic TPS connector
  • Damaged wiring
  • Short to reference voltage on signal circuit of MAP sensor
  • Loss of ground to MAP sensor or TPS
  • Open on signal circuit of MAP sensor
  • Bad PCM

Using a scanner or code reader, turn the ignition on and engine OFF; what does the MAP sensor voltage read? It should be about 4 Volts for sea level. If you are at a higher altitude, it should decrease about half a volt or so for each 1,000 ft. of altitude (this will vary from model to model) Or if you have a separate MAF (Mass air flow) sensor on your vehicle, they are usually equipped with a Barometric pressure reading. If so, the Baro reading should match the MAP reading (they both measure ambient air pressure). If they're roughly equal, then, check for Freeze Frame data of the MAP sensor (if available).

NOTE: Freeze Frame data is the PCM recording a fault when it happens. It captures the readings of the various PIDS (parameter identifiers)available to troubleshoot what happened. It's like a recording of the problem as it happened. At idle a typical MAP sensor Voltage reading should be about a volt, and at WOT (wide open throttle) it should approach 4.5 to 5 Volts. As for the TPS, at idle, the voltage reading is about 1 Volt or less. As the throttle is opened the reading will increase to 4.5 Volts at WOT. Do the two readings make sense? For example, if the TPS reading on Freeze Frame data shows 2.5 Volts (indicating partial throttle) does the MAP sensor indicate a reading that isn't at either extreme? Using the Freeze Frame data (if available) compare the MAP reading to the TPS when the problem occurred. This can help you identify what happened

If you have no access to Freeze Frame data then check if the MAP sensor voltage changes when you apply vacuum to it. You can do this by mouth or a vacuum pump. The voltage should increase as you apply vacuum. If the reading doesn't change as you apply vacuum, make sure there are no obstructions in the hose to the sensor. If the hose is clear, the MAP sensor is usually bad, but it doesn't rule out the following from causing the problem: Does the MAP sensor appear to be stuck at less than .5 Volts? Then:

NOTE: This code shouldn't set if the MAP is stuck at extremely low voltage, however, I'm adding it in because there's no way to know for certain for which vehicles a low voltage condition may set a P0105.

  1. Inspect the wiring harness and MAP sensor connector. Repair any damage
  2. Unplug the MAP sensor connector. Also, at the PCM connector, remove the MAP sensor signal wire and check for continuity to the MAP sensor connector. If there is infinite resistance, then repair open in MAP signal circuit. If the signal wire has continuity to the MAP sensor connector, then check for 5 volt reference voltage to the connector and a good ground. If both are present, then re-install all removed wiring and replace the MAP sensor.

Does the MAP sensor appear to be stuck at full 4.5 voltage? Then:

  1. Inspect the wiring harness for damage. Repair as needed
  2. Remove the MAP sensor signal wire from the PCM connector. With a voltmeter measure the voltage with KEY ON ENGINE OFF. Is there 4.5 Volts? If so, unplug the MAP sensor and recheck. If it is still present, then repair short between the signal wire and 5 volt reference wire.
  3. If unplugging the MAP sensor causes the voltage to disappear, check that the ground is intact. If it is, then replace the MAP sensor due to internal short.

Feb 27, 2011 | Jaguar X-Type Cars & Trucks

1 Answer

I have an '04 Chrysler Sebring Conv. 6 cyl with an error code of P 1296. What does that error code mean ?


CODE P1296 - 5 VOLT VREF SUPPLY NOT PRESENT - POSSIBLE CAUSE MAP SENSOR VREF CIRCUIT OPEN BETWEEN THE SENSOR AND PCM / MAP SENSOR GROUND CIRCUIT OPEN BETWEEN THE SENSOR AND PCM / MAP SENSOR IS DAMAGED OR HAS FAILED / PCM HAS FAILED.

Nov 09, 2010 | 2004 Chrysler Sebring

1 Answer

Car wont start after sitting for 6 hours runs like new if you start it before 6 hours codes p1496 always there when it fails to start.


Yes the car will fail to start due to this error code p1496.Its possible. Description of code P1496 is 5 Volt Supply Output Too Low. But to locate the exact fault you will need to do some troubleshooting. The 5 V ref. can be low for a couple reasons. 5V is supplied to several engine sensors, like the crank, cam, Map, etc. It's not uncommon on chryslers for one of the sensors to short the 5 V. reference voltage and get that code. To check if a sensor is bad and shorting the ref. just check for voltage on the 5V ref as you unplug each sensor. If the 5 V. ref. returns, the last sensor you unplugged is the shorted sensor. It's usually the crankshaft sensor, but not always. If the 5 V. ref. still is shorted after unplugging all sensors that receive 5V. ref, check for 5 V. at the PCM. If it's present at the PCM, there's an open or short after the PCM. If there isn't 5V ref at the PCM, it's probably a bad PCM. That is a 5 volt supply too low. You will want to check the connections at the MAP and TPS sensors. --------

Thanks. keep updated for any more query.you can rate this solution and show your appreciation.

Sep 22, 2010 | 1999 Chrysler Concorde

1 Answer

I have a P0106 error code on my 97 Subaru Legacy Outback. I just had a valve job done on the heads. I put the engine back together and put it back in the car, taking great care in the process. All hoses...


Using a scan tool, watch the MAP sensor value with the key on, engine off. Compare the BARO reading with the MAP reading. They should be roughly equal. The voltage for the MAP sensor should read approx. 4.5 volts. Now start the engine and look for a significant drop in the MAP sensor voltage indicating the MAP sensor is working.

If the MAP reading doesn't change perform the following:

With the Key on, engine off, disconnect the vacuum hose from the MAP sensor. Using a vacuum pump, pull 20 in. of vacuum on the MAP sensor. Does the voltage drop? It should. If it doesn't inspect the MAP sensor vacuum port and vacuum hose to manifold for a restriction of some kind. Repair or replace as necessary.
If there are no restrictions, and the value doesn't change with vacuum, then perform the following: with the Key on and engine off and the MAP sensor unplugged, check for 5 Volts at the reference wire to the MAP sensor connector with a Digital Voltmeter. If there is none, check for reference voltage at the PCM connector. If the reference voltage is present at the PCM connector but not the MAP connector, check for open or short in the reference wire between MAP and PCM and retest.
If reference voltage is present, then check for existing ground at the MAP sensor connector. If it isn't present then repair open/short in the ground circuit.
If ground is present, then replace MAP sensor.

Mar 03, 2010 | Subaru Outback Cars & Trucks

1 Answer

Stalling


I am dealing with the same issue. I have had the computer checks and there is nothing to indicate an issue.There were no computer error codes yet I stall at red lights.

The O2 sensor, the speed sensor or the MAP sensor may be one of the problems. The MAP sensor measure the air pressure in the manifold. It is commonly mounted on the fender and is low in cost and easy to replace. To test it if your if your car won't start, unplug the electrical connection from the MAP sensor. If it starts, then you know to replace the MAP sensor. The Hall Effect sensor can fail and not set an error code. This is an inespensive part that sits underneath the rotor in the distributor cap on cars without distributorless ignition. This only applies to cars made after 1996. Also check the fuel injectors and fuel filter.

If you have a burglar alarm, make sure that it is not causing the problem. It often times can cause the stalling issue.

Jul 18, 2009 | 1996 Dodge Stratus

1 Answer

My 03 Envoy will not idle. Keeps shutting off...


Got a solution for you on this. There is a small sensor, called the MAP sensor.
It is located on the top of the engine. You will see a blue sticker with Delco Motors 5V GND written on it. Has a wiring harness that you can pry up and
pull off. Unplug the wiring harness and plug it back in. You may need to reset the code errors. I had mine at a mechanic, and he did that , reset the code errors and it solved the problem.

Jun 22, 2009 | 2003 GMC Envoy

1 Answer

Volvo S40 Error code P0110 and P0105


there is two sensors that those code refer too. The map sensor, and the iat sensor. and both would have an effect on gas mileage. Both sensors would just make the car run a rich mixture.

Oct 16, 2008 | 2004 Ford Focus

Not finding what you are looking for?
2003 GMC Envoy Logo

51 people viewed this question

Ask a Question

Usually answered in minutes!

Top GMC Experts

yadayada
yadayada

Level 3 Expert

76846 Answers

Freddy

Level 3 Expert

1311 Answers

Colin Stickland
Colin Stickland

Level 3 Expert

22246 Answers

Are you a GMC Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides

Loading...