Question about 2003 Pontiac Aztek

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What is the pcm and where is it located and how hard to fix?

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The pcm is the computer for ur car its right by ur left foot in the dash if you r sitting in the driver seat if its bad you will have to get a new one the new one has to be programed at the dealer....ase certautotech

Posted on Nov 03, 2012

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Can someone help me on locating my c?oling fan switch on my 2003 ford escape.

Cooling fan switch ? The cooling fans on your vehicle are computer controlled . Relay's energized by PCM - engine computer . Coolant temp sensor is a input to the PCM ,when the temp. reaches 212 degress the PCM will energize the low speed fan relay ,if temp reaches 250 degress the PCM will energize the high speed cooling fan relay . Hooking up a scan tool an checking coolant temp. sensor data to the PCM and checking control from the PCM ( energizings relay's ) Is how to diagnose this . Not replacing parts and hope you fix the problem . Your best bet take it to a qualified repair shop.

Aug 13, 2017 | Ford Cars & Trucks

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What is limp mode

limp mode is a system built in the ecm or pcm that will allow your vehicle to drive at a slower speed when the ecm or pcm detects a problem so that you can stop at a safe location or drive to your mechanic, when the problem is fixed the ecm or pcm will allow the vehicle to drive normal again. hope this helps,

Jun 28, 2014 | 2002 Dodge Grand Caravan

1 Answer

Where the auto gearbox transmission computer module is located?

The TCM.
on most cars , the TCM was moved in to the ECM in 1996 or so.
then renamed PCM
but some cars they are still separate.

06 cooper.
my guess, as my online source stinks no wiring pages.
is its part of the PCM. get the PCM wriing
see the soleniods, see wire to the PCM
yes, then its in the PCM
so where is PCM
on most new cars. its moved to the engine bay
not hard to find the box with zillion wires.>?

ok I google for PCM
and 2nd hit lands here, am I magic>

3rd hit 06 match

wow air cooled, smart idea.

May 12, 2014 | 2007 Mini Cooper S Convertible

1 Answer

Electronic pressure control solenoid circuit p1745. Check engine light on 2000 ford escort, 4cl, automatic. Advance auto told me it was a dealer part but I can't find it on any of the ford websites?...

Here is what the service manual says about the EPC solenoid, the processor looks at allot of different inputs to command the solenoids, such as Throttle Position Sensor, Vehicle Speed Sensors, Transmission Range Sensor and RPM signal, The PCM controls the shift patterns for the transmission. Electronic Pressure Control (EPC) Solenoid
The electronic pressure control (EPC) solenoid is located on the main control valve body and is controlled by the PCM. The EPC controls line pressure used to apply and release clutches and bands in the transmission.
The 2-3 shift solenoid is located on the main control valve body and is switched on and off by electrical signals from the PCM. The 2-3 shift solenoid activates the 2-3 shift valve which controls the automatic shifting between second and third gear. Second gear is established when the 2-3 shift solenoid is switched on. The 2-3 shift solenoid is switched off when vehicle speed increases and requires a second to third gear upshift.
The 3-4 shift solenoid is located on the main control valve body and is switched on and off by electrical signals from the PCM. The 3-4 shift solenoid activates the 3-4 shift valve which controls the automatic shifting between third and fourth gear. Third gear is established when the 3-4 solenoid is switched off. The 3-4 shift solenoid is switched on when vehicle speed increases and requires a third to fourth gear upshift.

Mar 23, 2013 | Cars & Trucks

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93 Ford F150 5.0 with E4OD shifting hard and speedometer not working. Replace the speed censor and no codes are showing. Still same problem. Help??

The vehicle speed sensor (located in the differential) sends a signal to the Programmable Speedometer/Odometer Module (PSOM) and the Antilock Brake System (RABS module or 4WABS module depending on how your truck is equipped)

The Powertrain Control Module (PCM) which controls your transmission, gets its vehicle speed information from the PSOM.
I would need the engine size of your truck and know if it is 4 wheel drive before I could look up actual application charts.
However, You need to be aware that your PCM should ALWAYS output ether code 11 or code 111 if there are no other codes (again depending on how it is equipped) If it does not at least output one of these, then there is an issue with the way you are gathering codes or the PCM is defective.
Also there are three different sections in your PCM for fault codes. ALL of them need to be checked.
> Key On, Engine Off (KOEO) self test (Fix these codes FIRST)
> Key On, Engine Running (KOER) self test (Fix these codes SECOND)
> Continuous Memory codes (Fix these codes only if all other codes are fixed and these return after clearing codes and driving the vehicle)

Jun 01, 2012 | Ford F-150 Cars & Trucks

2 Answers

What is the PCM in the Ford Freestar and and what happens if water gets in or on it? Where is the PCM located? How much is the repair cost to fix this problem? How much does it cost to replace the PCM in...

The pcm is located Under the windshield wiper coil on the passenger side of the engine compartment, where water can collect.And yes if its get wet it can get short.The radio,the ac the lights and other electrical functions works intermittently .The cost of pcm is near to $1000.You can get it from autozone service center or from local auto part stores. ---------This will help.Thanks.Helpmech.

Dec 15, 2010 | 2005 Ford Freestar

1 Answer

Location of pcm on 2005 pacifica?

I have a 2004 Pacifica and mine is on the drivers side front, underneath between the bumper and the wheel splash guard. You will need to remove the splash guard ti access the PCM. Not very hard at all. Replacement time for a handy DIYer: about 1/2 hour. Good luck!!

May 12, 2010 | 2005 Chrysler Pacifica

1 Answer

Transmission is shifting hard and slow to pull on a 95 silouette also makes clucking sounds while accelerating

Shift suddenly become very hard. When going from park to either reverse or drive it slams into gear. 1-2 and 2-3 shifts are also harsh. All gears seems to work. Problem may be intermittent: Check TPS for smooth and linear electrical response over the entire range of motion. If not, replace.

Extremely harsh shifts from P or N, normal shifts at WOT: EPC (Electronic Pressure Control) solenoid failed. Easy fix in pan. Fix as soon as possible or hard parts will eventually break.

No 1st or 4th available; trans shifts 2nd to 3rd by itself in D or OD and locks the converter : ShiftA solenoid failed. Easy fix in the pan. Or a wiring problem from PCM to trans.. or PCM.

Car goes into gear but feels very sluggish like the brakes are dragging, but it will roll easily (starts out in 4th gear), you manually shift to 2 to get it moving, once it's moving you put it back in OD and the car shifts 3rd to 4th on its own and locks the converter at the appropriate time: ShiftB solenoid failed: Easy fix in the pan. Or a wiring problem from PCM to trans.. or PCM.

Mar 05, 2010 | 2002 Oldsmobile Silhouette

1 Answer

Have a short gone through 3 alternators/ 93 protege


Jul 08, 2009 | 1998 Mazda Protege

1 Answer

Where is the pcm on 1997 jeep grand cherokee 6 cyl?

I don't think the PCM is your problem, is the check engine light on? It could be you idle air control motor this is located on the throttle body, but because this happens while driving I am thinking you will need to replace your crank shaft position sensor it is located on the transmissinon bell housing it is very hard to replace without the correct tools. If the check engine light is on take it to a local auto parts store and ask if they can check the check engine codes for you they usally will do this for free.

Jun 03, 2009 | 1997 Jeep Grand Cherokee

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