Question about 2003 Chevrolet Monte Carlo

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What would cause my car to shift erraticly sometimes and lack power sometimes

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Faulty torque converter clutch circuit. or sensor

Posted on Sep 29, 2010

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Posted on Jan 02, 2017

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I have a code PO651 on a 2005 Chevy Alvalanche


Symptoms of a P0651 code may include: Failure of the transmission to shift between sport and economy modes Transmission shifting malfunctions Delayed (or no) transmission engagement Failure of the transmission to switch between all-wheel and two-wheel drive modes Failure of the transfer case to shift from low to high gear Lack of front differential engagement Lack of front hub engagement Erratic or inoperative speedometer/odometer

Read more at: https://www.obd-codes.com/p0651
Copyright OBD-Codes.com

Sep 12, 2017 | Cars & Trucks

3 Answers

Hot weather auto transmission shifting problem


Often this kind of problem it is caused from faulty throttle position sensor, you find out by connecting a code reader to your car computer.
throttle position sensor tells to your transmission control module how you are using the throttle, so that the car automatic transmission can shift to right gear, when this is faulty often you have transmission faults related to engine rpms and temperature, this can explain a trans problem happening only when engine is hot.
In some case it is not the sensor, but the computer module controlling transmission that is faulty.
To find out cause for the problem you need to connect a code reader to transmission module and to main computer module (ECU).
The code reader will return fault codes that allow to locate the problem. this kind of job can be done at any qualified garage.

Aug 16, 2008 | 1993 Toyota Camry V6

1 Answer

Hard erratic shifting 2006 kia spectra


Is the car running good? If the motor isnt running right and is missing with no power it will cause the transmission to shift hard due to taking to long to shift, so it could just need a tune up

Feb 27, 2014 | 2006 Kia Spectra

1 Answer

Ford f350 4x4 7.3 powerstroke, lack of power. max out at 20-30mph when pulling hills with or without trailer, doesn't seem to know when to shift, sometimes will shift sometimes not. ?????


check the wiring harness and connectors to the boost sensor, if sensor is not reading the truck drops into safe mode, and drastically decreases engine power. the sensor is located on the intake manifold.

Feb 07, 2011 | 1999 Ford F350 Regular Cab

1 Answer

I have a 1997 323i 2.5 the engine sometimes idles erratically and lacks power or hesitates in acceleration


Hello my solution is have your ignition timing checked your symptoms described fits incorrect ignition timing.Most garages will check and set your ignition timing for a set rate,

Jan 06, 2011 | 1994 BMW 3 Series

1 Answer

Suburban is not shifting smoothly or at the correct time. Besides transmission, what other possible causes could this be?


I have run into a lot of transmission shift concerns that ended up being as simple as a fuel filter replacement. This would be a lack of power, a delayed shift, or no shift at times, sometimes you need to let off of the gas to allow a shift. I would try this before bringing iit to a trans. shop. Good luck...Coop

Dec 12, 2010 | 1989 GMC Suburban

3 Answers

Trans shifting prob n gas mileage


have the shift solenoid checked out
Auto Zone will perform a free scan of the computer to dee which one is at fault

Feb 28, 2010 | 1996 Ford F250 Crew Cab

2 Answers

When I press the gas pedal hard and it downshifts sometimes it gives a loud hissing type sound and feels like the clutch is slipping. I have the automatic tranny and the 3.0 on my 02 spyder convertible.


Hi,

Thanks for using Fixya.

One of the most common complaints with automatics is fluid leaks. Fluid can leak out of the driveshaft seals, the input shaft seal, the transmission pan gasket, the torque converter or the ATF cooler and line connections. If the fluid level gets low, the transmission may be slow to engage when it is shifted into drive. Gear shifts may be sloppy or delayed, or the transmission may slip between shifts. If the fluid level is really low, the transmission may cause the vehicle to not go at all. I hope this helps.

Thanks and have a nice day.

- Hotratchet

Nov 03, 2009 | 2002 Mitsubishi Eclipse Spyder

1 Answer

ERRATIC TICK OVER SOMETIMES HIGH REVS AND SOMETIMES STALLS - LUMPY TICK OVER AND LACK OF POWER


dear friend-i do not believe that the problem lies with the gearbox.please find a friend with the same car and swop the TPS(trottle body sensor)and try your car if you cannot fiend a friend then go to a dealership,beware of what they will tell you but insist on there help with trying another TPSsensor

Oct 30, 2009 | 2002 Hyundai Santa Fe

1 Answer

Idle at 3000rpm, sometimes won't start, trans shifts erratically


check and make sure you don't have a vaccum leak check all vaccum hoses. with the engine running so fast it could cause the trans problem

Oct 17, 2009 | 1992 Ford F150 SuperCab

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