Question about 2006 Pontiac Montana SV6

2 Answers

How to fix pntiac montana sv6 2006 reduced engine power

Posted by on

2 Answers

  • Level 2:

    An expert who has achieved level 2 by getting 100 points


    An expert that got 5 achievements.


    A rookie expert who has answered 20 questions on their first day.


    An expert who has answered 20 or more questions within one hour.

  • Expert
  • 87 Answers

You have to scan the OBDII for codes first. Most likely throttlebody issue

Posted on Jun 21, 2015

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points

    Top Expert:

    An expert who has finished #1 on the weekly Top 10 Fixya Experts Leaderboard.


    An expert that got 20 achievements.


    An expert that got 10 achievements.

  • Pontiac Master
  • 9,098 Answers


Posted on Jun 17, 2015

3 Suggested Answers

  • 2 Answers

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

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.

Posted on Jan 02, 2017

  • 508 Answers

SOURCE: 2002pontiac montana running at reduced power

if you have an autozone in town or similiar parts house they will let you use handheld scanner for free

Posted on Jun 28, 2009

  • 749 Answers

SOURCE: 2005 Montana Sv6 3.5L on

Condition • Some customers may comment on an intermittent malfunction indicator lamp (MIL) being Illuminated with a message or an indicator that displays Reduced Engine Power. • The technician may observe on a scan tool DTC P2138 - Accelerator Pedal Position (APP) Sensor 1-2 Correlation set as Current or in History.
CauseThis condition may be caused by water intrusion into the instrument panel (IP) to body harness connector, which carries the APP sensor signals to the ECM/PCM. This water intrusion results in a voltage difference between APP Sensor 1 and APP Sensor 2 that exceeds a predetermined value for more than a calibrated period of time, setting P2138.


    Note: Aftermarket equipment can generate DTC P2138 and/or other DTCs.
  1. Verify that aftermarket equipment is not electrically connected to any of the APP sensor signal or low reference circuits or to any other ECM/PCM 5V reference or low reference circuits. Refer to Checking Aftermarket Accessories in SI.
  2. Perform the Diagnostic System Check - Vehicle.
  3. ? If any 5V reference DTCs are set, refer to Diagnostic Trouble Code (DTC) List - Vehicle. ? If any 5V reference DTCs are not set, proceed to Step 3.
  4. Locate the IP to body harness connector, which may be located in and around the left hand kick panel area or inside the IP. Depending on the vehicle and model year, refer to Wiring Systems or Power and Signal Distribution in SI.
  5. Note: Some examples of potential water leaks are: A-pillar seals, sunroof drain lines (if equipped) and windshield/cowl sealing.
  6. Inspect for a water leak in the area. If necessary use a water hose to determine the source of the leak. Refer to General Information > Water Leaks in SI.
  7. ? If a water leak is observed, repair as necessary. Verify the effectiveness of the repair.
  8. Inspect the IP to body harness connector terminals for corrosion and debris. Refer to Testing for Intermittent Conditions and Poor Connections in SI.
  9. ? If any corrosion and/or debris is observed, repair as necessary.
  10. After completing the repair, verify the proper operation of the system. Depending on the vehicle and model year, perform the Diagnostic Repair Verification procedure or refer to Diagnostic Trouble Code (DTC) List - Vehicle in SI.
This is as service bulletin I located. Is there any additional codes present.Would definitely check that harness connection for corrosion and is vehicle running poorly?

Posted on Jun 23, 2011

Add Your Answer

Uploading: 0%


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



Related Questions:

1 Answer

How to fix power reduced in my Chevy duramax

Help, Engine Power Is Reduced on Chevy Duramax - Page 4 - Forest ... > ... > Off Topic

May 27, 2014 - 10 posts - ‎5 authors
OK, many things can cause a reduced engine power message, ... as a regen message and no, idling long enough to fix a wheel WILL NOT plug it up. ... I have a monitor onmy truck that I can watch the accumulated soot grams ...

Nov 14, 2015 | Cars & Trucks

1 Answer

What is the proper fuel pressure for a 2004 pntiac grand prix gt?

its between 2 bar and 5bar. but you can tell if you turn on the engine then off and press the valve on the injector line if it squirts out under pressure its fine.( do on cold engine not HOT!)

Feb 21, 2014 | Pontiac Grand Prix Cars & Trucks

1 Answer

Engine power reduced chevy impala

engine power reduced means that the CPU has placed the ECM in a safe operating mode and reduced power to lessen the risk of serious engine / transmission damage. Stop and check oil level and coolant level at the radiator cap. have the fault codes read urgently so as to prevent damage to the units

Dec 25, 2013 | Chevrolet Cars & Trucks

1 Answer

My engine reduced power, check engine &tractions

go to + translate the website amazing with your browser and fix it.
God bless you

Jul 15, 2013 | Cars & Trucks

1 Answer

I have a 2001 Montana with 84000 miles on it and just recently got an estimate for replacing the head gaskets for $1900-the van sputters initially after sitting for a period of time and then seems fine. ...

First check that this is true, Check your dipstick, if you see a "milkshake" then that is definately your problem. If you keep driving on it like this you will cause excess strain on the engine from it being over filled with fuilds. You will also reduce the ability of the oil to cool and lubricate the engine properly. It is possible you will ruin your engine. Also you run the risk of over heating your engine from the coolant leak, and will have to continually add coolant/water to the system.

Oct 26, 2010 | 2001 Pontiac Montana

1 Answer

Do the 2002 pntiac grand am have two oxygen sensers? car has no power. though it was transmission? was told that in could be the catyliatic converter.

bad O2 sensor(s) won't cause significant loss of power. restriction with gas flow (filter, pump) or exhaust (catalytic converter) most definitely can.

Sep 10, 2010 | 2002 Pontiac Grand Am

2 Answers

Engine power is reduced keeps showing on the dash screen, as does service traction control. the car is running rough and has no power when this occurs.

how do you fix the "reduced engine power" light on the dash bard of a 07 Chevy Impala LTZ and "Service Traction Control"?

Feb 12, 2010 | 2006 Chevrolet Impala

2 Answers

Reduced engine power signal throwing out codes p1125 and p2138. what do i do to fix the problem?

There is a GM service bulletin on this particular item. basically covers both codes your getting.
#07-06-04-019A: Intermittent MIL/SES, DTC P2138 with Reduced Engine Power (Repair Instrument Panel (IP) to Body Harness Connector)

Models: 2005-2008 GM Passenger Cars and Light Duty Trucks (Including Saturn)

Jul 03, 2009 | 2005 Pontiac Grand Prix

1 Answer

2002pontiac montana running at reduced power

if you have an autozone in town or similiar parts house they will let you use handheld scanner for free

Jun 28, 2009 | 2007 Pontiac Montana

1 Answer

Engine running at reduced power

change mass airflow meter.

Jun 28, 2009 | 2007 Pontiac Montana

Not finding what you are looking for?
2006 Pontiac Montana SV6 Logo

143 people viewed this question

Ask a Question

Usually answered in minutes!

Top Pontiac Experts


Level 3 Expert

75817 Answers

Colin Stickland
Colin Stickland

Level 3 Expert

22156 Answers

Jeff Turcotte
Jeff Turcotte

Level 3 Expert

8180 Answers

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

Answer questions

Manuals & User Guides