Question about 2004 Saturn VUE

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Just replaced Battery at parts store. Starts fine runs good at speed but does not idle, do I need to do the powertrain control module procedure?

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If you have not drove it very much,it will not relearn,it is possible that you may have to have the dealer,or a shop with the soft wear,to reprogram the computer,if it does not relearn,these newer models,are supposed to have a aux unit plugged into the aux plug in the vehicle(cig lighter)to keep this from happening while installing a new battery.

Posted on Jul 06, 2010

  • Ronny Bennett Sr.
    Ronny Bennett Sr. Jul 06, 2010

    You need to drive it at 40 miles a hour for about 5 miles to see if it will relearn.

  • pooleb62 Jul 06, 2010

    I drove it from the parts store about 10 min at speeds up to 65 mph and also 25miles at 55-65. It is a 4cly. and stick, some times it's ok and then not. look's like dealer? you think they would have had something in owners manual.



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Where is the ecm in 2002 lincoln navigator

REMOVAL AND INSTALLATION Procedure revision date: 06/17/1999 Powertrain Control Module (PCM) Removal and Installation
  1. Disconnect the battery negative cable. For additional information, refer to Section 414-00 .
  1. Remove the right front door scuff plate.
  1. Remove the right cowl side trim panel.
  1. Remove the components in the order indicated in the following illustration and table.
  1. To install, reverse the removal procedure.

    Item Part Number Description 1 - Powertrain control module (PCM) electrical connector 2 - Retainer clip 3 - Powertrain control module

Sep 14, 2015 | Lincoln Cars & Trucks

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Correct code P0504?

What Colorado do you have ? 2 wheel or 4 wheel drive ? Sport ,sport LS 3.5L , Z71, Z71 LS. etc. what size engine ? an does it have electronic throttle control ? I have factory service info an it is not showing that code .
DTC P0506

Circuit Description

The throttle actuator control (TAC) motor is controlled by the powertrain control module (PCM). The DC motor located in the throttle body drives the throttle plate. In order to decrease idle speed, the PCM commands the throttle closed reducing air flow into the engine and the idle speed decreases. In order to increase idle speed, the PCM commands the throttle plate open allowing more air to pass the throttle plate. If the actual idle RPM does not match the desired idle RPM within a calibrated time, this DTC sets.

DTC Descriptor

This diagnostic procedure supports the following DTC:
DTC P0506 Idle Speed Low
DTC P0507

Circuit Description

The throttle actuator control (TAC) motor is controlled by the powertrain control module (PCM). The DC motor located in the throttle body drives the throttle plate. In order to decrease idle speed, the PCM commands the throttle closed reducing air flow into the engine and the idle speed decreases. In order to increase idle speed, the PCM commands the throttle plate open allowing more air to pass the throttle plate. If the actual idle RPM does not match the desired idle RPM within a calibrated time, this DTC sets.

DTC Descriptor

This diagnostic procedure supports the following DTC:
DTC P0507 Idle Speed High
Cleaning the throttle body mite take care of it !
Cleaning Cleaning An Electronic Throttle Body Safely

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Po601 code comes in with reader chevy Colorado starts and dies

Possible causes
- Faulty Powertrain Control Module (PCM)
- Powertrain Control Module (PCM) harness is open or shorted
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Jan 05, 2015 | Cars & Trucks

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1996 mercedes c280 dies when put in drive

Engine stalls or RPM fluctuates at idle up and down or dies near idle.

This problem is commonly caused by a dirty automatic idle speed control valve and throttle valve but always run a OBD2 fault code as well as the cleaning procedure. Buy a can of throttle valve cleaner (do not use carburetor spray cleaner!) from NAPA or Carquest (made by CRC chemicals) and spray it into the air intake while the engine is running, use up about 1/2 the can, engine will try to stall hold the speed up, shut it down and let it soak for 30 minutes, restart and blow out the remaining fluid, shut it down and disconnect the negative battery cable for 5 Min's to reset the base idle control

Oct 15, 2012 | 1996 Mercedes-Benz C-Class

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Engine light is on code coming up p0601

This code indicates an error or fault in the powertrain control module memory. A common procedure known as memory flashing is performed at the dealer. The vehicle's computer (powertrain control module) memory is erased, then replaced with an updated version of the previous driveability program. If the powertrain control module doesn't store the program, then a replacement module would be the next likely service.

Sep 09, 2011 | 2002 Chrysler Town & Country

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The onboard computer, or Powertrain Control Module (PCM),is the brains of the engine control system, so when the brain is not functioning correctly neither is the engine or anything else that the microprocessor controls - which may include the charging system, transmission, various emission controls and communications with other onboard control modules. Once a diagnosis has been made (and we emphasize the word diagnosis), then and only then should the PCM be replaced. It could be something as simple as the throttle position sensor, O2Sensor, etc. But knowing for sure could save a lot of time and money. The resetting (relearning process can be problematic in ways like causing car alarm problems, etc.
You can try unhooking the battery for about 15 minutes and see if it will reset the module but it's not likely. It could be many, many things so you really should have it diagnosed
Onboard Diagnostic (OBD II) diagnostic trouble codes that typically indicate a fault with the powertrain control module include:

P0600....Serial Communication Link

P0601....Internal Control Module Memory Check Sum Error

P0602....Control Module Programming Error

P0603....Internal Control Module Keep Alive Memory (KAM) Error

P0604....Internal Control Module Random Access Memory (RAM) Error

P0605....Internal Control Module Read Only Memory (ROM) Error

P0606....ECM/PCM Processor

P0607....Control Module Performance

P0608....Control Module VSS Output 'A'

P0609....Control Module VSS Output 'B'

P0610....Control Module Vehicle Options Error

If you see any of these codes when diagnosing the vehicle with a code reader or scan tool, it may mean the PCM has failed and must be replaced. Additional diagnostic tests will usually be necessary to confirm the problem is really the powertrain control module and NOT something else.
All too often, technicians tend to blame that which they understand least. If an engine is not running right and the cause is not obvious, they may blame the computer. Throwing parts at a problem in an attempt to solve it may be good for the parts business, but when a customer brings a PCM back because it failed to fix their problem, nobody wins. Warranty returns on complicated and expensive components like powertrain control modules are an ongoing problem that costs everyone money.
UNNECESSARY POWERTRAIN CONTROL MODULE RETURNS. Over 50 percent of PCMs that are returned under warranty (either because the PCM failed to fix a performance problem or because the engine did not run properly after it was installed) have nothing wrong with them! So it is obvious a lot of people are swapping computers to see if a different PCM will fix their problem.
Unfortunately, there is no easy way of doing that in a parts store. Be warned, though, that many parts stores have a policy of "no returns or refunds on electronic components."
PCMs typically fail for one of two reasons: voltage overloads (often due to a short in a solenoid or actuator circuit) or environmental factors (corrosion, thermal stress or vibration). If the shorted solenoid or actuator is not found and repaired, the voltage overload it creates may damage the replacement PCM, too.
As for environmental factors, water is the main thing to avoid. If water gets inside a PCM, it can short circuits and set up irreversible corrosion that ruins electronic connections. Most remanufacturers will not even attempt to repair a PCM if the vehicle it came out of was submerged in a flood. Replacement is the only option. Thermal stress and vibration can form microcracks in circuit boards (which are repairable). This often has more to due with the ruggedness of the circuit design than operation factors in the vehicle itself.
Because there are so many different PCMs, accurate identification of the PCM and its correct replacement is absolutely essential to prevent unnecessary returns. Many PCMs appear to be exactly the same on the outside (same sized box and connectors) but may be wired or calibrated differently inside.
Accurately identifying the PCM requires not only the vehicle year, make, model and engine size, but also the OEM part number on the PCM itself. Most supplier catalogs list replacement PCMs both ways. So if in doubt, always refer to the OEM number on the PCM and look it up in the suppliers cross reference index to find their replacement part number.
The calibration chip and PROM contains the programming instructions for the vehicle application. That is why it usually does not come with the replacement PCM. There are too many different possibilities. On many newer vehicles, flash memory or "EEPROMs" (Electronically Erasable Program Read Only Memory) are used. If the replacement PROM is not properly programmed for the application, it must be reprogrammed after it has been installed.

Unfortunately, the ability to do this type of reprogramming is not readily available to the aftermarket. The car makers do not want aftermarket technicians messing around with the calibration of their onboard computers because they are afraid doing so may alter emissions or performance. But that is another issue. One such example is Chrysler transmission modules. They must be reset with the factory DRB scan tool and dealer codes to set the "pinion factor," which controls the operation of the speedometer.


Because a powertrain control module can be very expensive to replace, almost all aftermarket replacement PCMs are "remanufactured" units. A PCM is not rebuilt in the same way that an alternator or water pump is rebuilt because there are no mechanical parts that wear out. Remanufacturing in this case usually means testing the powertrain control module, isolating and repairing any faults that may be found, then retesting the powert5ain control module to make sure everything works correctly.

A remanufactured PCM is typically sold one of two ways: on an exchange basis from stock, or on a custom rebuild basis. If a particular PCM is not in stock or is unavailable, you may be able to send an old PCM to a remanufacturer for repair. Turn around time is typically a few days and the cost is about the same as an exchange unit except there is no core charge). The hard part is finding a remanufacturer who can test and repair your powertrain control module.

Some PCMs, though, may not be repairable. As we said earlier, most remanufacturers will not even touch a PCM if it came out of a flooded vehicle.


Replacing a PCM is essentially a matter of swapping boxes. Accessibility can be a problem on some vehicles because the PCM is often buried under or behind other components in the instrument panel, climate control system or console. Some are located under a seat and require removing the seat.

Regardless of the PCM's location, though, one thing you should do prior to removing the old PCM and installing the replacement PCM is disconnect the battery.

On some applications, there may be a specific relearn procedure for establishing the base idle speed and other operating parameters. On others, it may be necessary to take the vehicle for a short test drive so the computer can adjust itself. The exact requirements will be spelled out in the vehicle service manual. The best advice here is to test drive the vehicle after the powertrain control module has been installed. A short drive cycle that includes going over 35 mph will usually reset most PCMs so they will operate properly.
The powertrain control module will also continue to learn and make small adjustments to the fuel mixture and other functions over time as the vehicle accumulates miles. If the PCM also controls the transmission, it may take awhile to relearn the driver's habits so the transmission may not shift exactly the same as before until this occurs.

If the engine control system is not going into closed loop, chances are the coolant sensor or oxygen sensor may not be working properly. If spark timing seems to be over advanced or retarded, the problem may be a faulty MAP sensor, misadjusted throttle position sensor or overly sensitive knock sensor. And if nothing seems to work right, low charging voltage due to a weak alternator or poor battery connections may be the fault.

Remember, a powertrain control module needs all its sensor inputs, proper battery voltage, a good ground and the ability to send out control signals to function normally.
Good luck
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Oct 27, 2010 | 2004 GMC Envoy

1 Answer

Have replaced ECM ' fuel pump and given it a tune up, but still wont run smooth.Ive also replaced idle sensor ,trans speed sensor and now it starts hard idles for ashort time and stalls. Then when it does...

That sounds exactly like a problem with the PCM. (Powertrain Control Module)

I have heard of aftermarket stereos and even the passenger side air-bag switch causing similar problems, and a "No Bus" message means that the PCM is not communicating with certain modules, and the dash lights and gauges can become erratic and the vehicle performance will be affected.

The next time that the vehicle acts up try wiggling the connector at the PCM and see if it makes any difference, and also you can dis-connect the battery, and dis-connect the wiring connector to the PCM for three minutes and then re-connect the PCM and then the battery and see how the truck runs, if it changes how the vehicle runs and the dash lights and gauges are normal with no "No Bus" message, then you will need to replace that PCM.

Jun 09, 2010 | 2000 Dodge Ram 3500

2 Answers

I want to change the battery

Unless you Have AoolCodes DEALER IS A GOOD IDEA

Disconnecting/Connecting The Battery

Always stop the engine before disconnecting the battery negative lead and make sure the battery positive lead is isolated i.e. wrapped in a suitable cloth.

WARNING: Radio code saving devices must not be used when conducting work on air bag or fuel systems. It must be noted that, when using these devices, the vehicle electrical system is still live albeit with a reduced current flow.

NOTE: Before disconnecting the battery make sure that the radio receiver/cassette player/mini disc player and compact disc player keycodes are known and, that no data is required from the powertrain control module as battery disconnection will erase any fault codes and idle/drive values held in the Keep Alive Memory (KAM). It is not necessary to disconnect or remove electronic control modules.

Always disconnect the battery before commencing repair operations which require:
  • The vehicle to be jacked up
  • Work on the engine
  • Work underneath the vehicle
  • Arc welding
Alternatively a Radio Code Saver may be used. With the battery disconnected, a Radio Code Saver will allow sufficient current to pass to maintain the radio receiver/cassette player/mini disc player and compact disc player memory, operate the clock and supply the door operated interior lights while isolating the battery in the event of a short circuit.

Reconnecting the Battery

WARNING: If the battery has been on bench charge the cells may be giving off explosive hydrogen gas. Avoid creating sparks, and if in doubt cover the vent plugs or covers with a damp cloth.

Always make sure that all electrical systems are switched OFF before reconnecting the battery to avoid causing sparks or damage to sensitive electrical equipment.

Always reconnect the battery positive lead first and the negative last, ensuring that there is a good electrical contact and the battery terminals are secure.

Restart the clock (where fitted) and set it to the correct time.

Re-enter the radio receiver/cassette player/mini disc player and compact disc player keycodes and preset' frequencies, if known.

Following reconnection of the battery, the engine should be allowed to idle until it has reached normal operating temperature as the stored idle and drive values contained within the powertrain control module have been lost. Allow the vehicle to idle for a further three minutes . Drive the vehicle at constant speeds of approximately 48 km/h (30 mph), 64 km/h (40 mph), 80 km/h (50 mph), 96 km/h (60 mph) and 112 km/h (70 mph) for three minutes each. This may cause a driveability concern if the procedure is not carried out. This will allow the powertrain control module to relearn idle values.

Jun 20, 2009 | 2003 Jaguar X-Type

1 Answer

Diagram of where the speed sensor of a 1993 ford taurus

i Have 96 Taurus, may help you. May be a little different on 93. good luck. please rate if this is what you need.
3.0L (2V) and 3.0L (4V) Engine
The vehicle speed sensor (VSS) (9E731) is:
  • a Hall-effect pickup that sends a signal to the powertrain control module (PCM) (12A650).
  • able to provide the VSS signal which tells the powertrain control module vehicle speed.
Vehicle Speed Sensor (VSS) (Except SHO) Removal and Installation
  1. Disconnect battery ground cable (14301) and positive battery cable.
  1. Raise and suitably support vehicle on hoist. Refer to Section 00-02 .
  1. Remove three bolts, seven nuts and Y-pipe assembly from vehicle.
  1. Disconnect vehicle speed sensor electrical connector.
  1. Remove vehicle speed sensor retaining bolt and vehicle speed sensor (VSS) (9E731) from transaxle.
  1. To install, reverse Removal procedure. Tighten VSS retaining bolt to 3.4-4.5 Nm (31-39 lb-in). Tighten Y-pipe assembly nuts and bolts to 34-46 Nm (26-34 lb-ft).

Apr 04, 2009 | 1993 Ford Taurus

2 Answers

Nissan Quest 2001 turns off when idle

Idle air control at base of throttle body. Passages could be plugged or idle hard stop needs adjusting.

Air Intake System Sensors Air intake system sensors include a heated resistor-type mass air flow (MAF) sensor and throttle position (TP) sensor; both supply data to the powertrain control module (PCM). The PCM also monitors engine speed.
Air Intake System Control Devices The idle air control (IAC) solenoid regulates idle speed by adjusting the amount of air allowed into the intake manifold. Adjustment is made by varying the duty cycle output by the powertrain control module (PCM). The PCM will increase the duty cycle for added mechanical or electrical loads. The IAC solenoid is combined with the fast idle control (FIC) solenoid which is turned on when the air conditioner is engaged to help compensate for the additional load. The IAC valve must be replaced as an assembly with the FIC solenoid.
Fast Idle Control (FIC) Solenoid The fast idle control (FIC) solenoid (Figure 1) compensates for idle speed change caused by the operation of the air conditioner compressor. The FIC solenoid is controlled by the FIC relay. The FIC relay is energized when the air conditioner clutch is energized and the relay allows the FIC solenoid to turn on and let an additional volume of air into the intake manifold.
Figure 1: Fast Idle Control (FIC) Solenoid
47fb9be.gif ------------------------------------------------------
Throttle Body (TB) The throttle body (TB) controls the amount of air that flows into the engine through a single butterfly valve. The single butterfly valve opening is determined by the accelerator pedal. The TB is cast with an air bypass channel and houses several emission-related components for the powertrain control module (PCM).
Throttle Position Sensor (TP Sensor) The throttle position (TP) sensor responds to the accelerator pedal movement. The TP sensor is a potentiometer that transforms the throttle plate opening angle into output voltage and sends the voltage signal to the powertrain control module (PCM). In addition, the sensor detects the opening and closing speed of the throttle plate and sends the voltage signal to the PCM. Also, the TP sensor is used to determine the air intake when the mass air flow (MAF) sensor fails. This mode of operation is called Fail Safe.
The TP sensor integrates the idle (IDL) switch within the housing. The IDL switch detects when the throttle plate is closed and an idle condition occurs. The PCM is supplied with this input signal.



Apr 03, 2009 | 2001 Nissan Quest

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