Question about 2003 Chevrolet Silverado 2500HD

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2003 2500 HD code P1518a

I have replaced the TAC wiring harness and still have a code, P1518a (TAC Mod serial data circuit)--and on the display in the dash it says (reduced engine power) any ideas on what the problem is?

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Try to charge the battery.

Posted on Jun 25, 2008

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2009 Chevy Silverado 1500 cruse stoped working but light is still on.


This is very complex , first thing is have the vehicle checked for DTC'S - diagnostic trouble codes stored in the BCM , PCM !
The body control module (BCM) monitors the signal circuit of the cruise control switches. The BCM relays the cruise control switch status to the engine control module (ECM) via the GMLAN serial data circuit. The ECM uses the status of the cruise control switch to determine when to capture and maintain the vehicle speed. The ECM monitors the vehicle speed signal circuit in order to determine the desired vehicle speed. The ECM uses the throttle actuator control (TAC) motor in order to maintain the vehicle speed. For further information on the TAC System, refer to Throttle Actuator Control (TAC) System Descriptionfor the 4.3L engine or Throttle Actuator Control (TAC) System Description for the 4.8L, 5.3L, 6.0L, 6.2L or 7.0L engines.
Your best bet would be to take to the dealer !
Yo

Oct 24, 2016 | 2009 Chevrolet Silverado 1500

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TROUBLE CODE 2004 ISUZU U0107


Usually requires a new throttle actuator which may only be available as part of a throttle body assembly

Aug 27, 2016 | 2004 Isuzu Ascender

1 Answer

What are the probable causes of DTC U1000?


DTC U1000 and U1255
Class 2 Communication Malfunction , Do you know what class 2 serial data communication network is ? What module set this code an what kind of scan tool did you use to read this code .
Modules connected to the class 2 serial data circuit monitor for serial data communications during normal vehicle operation. Operating information and commands are exchanged among the modules. When a module receives a message for a critical operating parameter, the module records the ID number of the module which sent the message for State of Health monitoring, Node Alive messages. A critical operating parameter is one which, when not received, requires that the module use a default value for that parameter. When a module does not associate an ID number with at least one critical parameter within about 5.5 seconds of beginning serial data communication, DTC U1000 or U1255 is set. When more than one critical parameter does not have an ID number associated with it, the DTC will only be reported once.
The table below list the modules on the Class 2 Serial Data Circuit that will set a U1000 or U1255 and should be actively communicating the previously described messages on the Class 2 Serial Data Circuit.

Control Module

ID Number
Body Control Module (BCM)
064
Electronic Brake Control Module (EBCM)
040
Instrument Panel Cluster (IPC)
096
Radio
128
Powertrain Control Module (PCM)
016
Sensing and Diagnostic Module (SDM)
088
Diagnostic Aids
When a malfunction such as a open fuse to a module occurs while modules are communicating, a Loss of Communication DTC is set as current. When the modules stop communicating, ignition is turned off, the current Loss Communication DTC is cleared but the history DTC remains. When the modules begin to communicate again, the ignition is turned on, the module with the open fuse will not be learned by the other modules so U1000 or U1255 is set current by the other modules. If the malfunction occurs when the modules are not communicating, only U1000 or U1255 is set.
Test Description
The numbers below refer to the step numbers on the diagnostic table.

  1. A DTC U1001 - U1254 Lost Communications with with a history status may indicate the cause of U1000 or U1255.

  2. The modules not communicating are the likely cause of U1000 or U1255. The modules that are available on the class 2 serial data circuit are listed in the Circuit Description.

  3. The module which was not communicating due to a poor connection to the class 2 serial data circuit may have set DTC U1001 - U1254 Lost Communications with for those modules that it was monitoring.

  4. The modules which can communicate indicate the module which cannot communicate. You must clear the serial data communication DTCs from these modules to avoid future misdiagnosis.

  5. If all modules are communicating, the module which set U1000 or U1255 may have done so due to some other condition.

  6. The module which set U1000 or U1255 is the likely cause of the malfunction.

1
  1. Install a scan tool.
  2. Turn ON the ignition, with the engine OFF.
  3. Record the DTCs set in each module. If using a Tech 2, use the Class 2 DTC Check feature to determine which modules have DTCs set.
Did you record any DTCs in the range of U1001-U1254 with a history status?
Go to Diagnostic Trouble Code (DTC) List
Go to Step 2

2
  1. Turn ON the ignition, with the engine OFF.
  2. Attempt to communicate with each module on the class 2 serial data circuit. If using a Tech 2, obtain this information using the class 2 Message Monitor feature.
  3. Record all of the modules communicating on the class 2 serial data circuit.
  4. Compare the list of modules which are communicating to the list given in Circuit Description.
Does any module on the class 2 serial data circuit not communicate?
YES - Go to Step 3
NO - Go to Step 12
Test the following circuits of the module that is not communicating for an open or short to ground:
?€¢
The battery positive voltage supply circuits


?€¢
The switched battery positive supply circuits


?€¢
The battery positive voltage output circuits


?€¢
The ignition voltage input circuits


?€¢
The ignition voltage output circuits

Refer to the following:
?€¢
Control Module References in Body Control System for the applicable schematic


?€¢
Circuit Testing in Wiring Systems


?€¢
Wiring Repairs in Wiring Systems

Did you find and correct the condition?

5

Important: Inspect all connectors in the serial data communications circuit.
Refer to the following:
?€¢
Data Link Connector Schematics


?€¢
Testing for Intermittent Conditions and Poor Connections in Wiring Systems


?€¢
Connector Repairs in Wiring Systems

  1. Turn OFF the ignition.
  2. Test the class 2 serial data circuits of the module that is not communicating for an open. Refer to the following:
?€¢
Data Link Connector Schematics


?€¢
Circuit Testing in Wiring Systems


?€¢
Wiring Repairs in Wiring Systems

Did you find and correct the condition?
Go to Step 8
Go to Step 6

6
Inspect the harness connector of the module that is not communicating for poor connections and terminal tension at the following circuits:
?€¢
The battery positive voltage input circuits


?€¢
The switched battery positive voltage supply


?€¢
The battery positive voltage output circuits


?€¢
The ignition voltage input circuits


?€¢
The ignition voltage output circuits


?€¢
The ground circuits


?€¢
The class 2 serial data circuits

Refer to the following:
?€¢
Control Module References in Body Control System for the applicable schematic


?€¢
Testing for Intermittent Conditions and Poor Connections in Wiring Systems


?€¢
Connector Repairs in Wiring Systems

Did you find and correct the condition?
Go to Step 8
Go to Step 7

7

Important: Perform the module programming or setup procedure if required.
Replace the module that is not communicating. Refer to Control Module References in Body Control System for the appropriate Repair Instructions for the module replacement.
Did you complete the replacement?
Go to Step 10
--

8

  1. Install a scan tool.
  2. Turn ON the ignition, with the engine OFF.
  3. Select the Display DTCs function for the module which was not communicating.
Does the scan tool display any DTCs which do not begin with a "U"?
Go to Control Module References in Body Control System for applicable Diagnostic System Check
Go to Step 9

9
Use the scan tool in order to clear the DTCs.
Did you complete the action?
Go to Step 10
--

10

Select the Display DTCs function for the modules which had U1000 or U1255 set as a current DTC.
Does the scan tool display DTCs which do not begin with a "U"?
Go to Control Module References in Body Control System for applicable Diagnostic System Check
Go to Step 11

11

Use the scan tool in order to clear the DTCs.
Did you complete the action?
System OK
--

12
Did you record any other DTCs for the modules which had U1000 or U1255 set as a current DTC?
Go to
Control Module References in Body Control System for applicable Diagnostic System Check
Go to Step 13

13

  1. Install a scan tool.
  2. Turn ON the ignition, with the engine OFF.
  3. Use the scan tool in order to clear the DTCs.
  4. Turn OFF the ignition for at least 5 seconds.
  5. Turn ON the ignition with the engine OFF.
  6. Select the Display DTCs function.
Does the scan tool display U1000 or U1255 set as a current DTC?
Go to Step 14
Go to Diagnostic Aids

14
Important: Perform the module programming or setup procedure if required.
Replace the module which had U1000 or U1255 set as a current DTC. Refer to
Control Module References in Body Control System for the appropriate Repair Instructions for the module replacement.
Did you complete the replacement?
System OK

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What is p0053 on a 2005 buick


Take the vehicle to Auto Zone or one of the other auto parts dealers and they will check it for FREE. They can advise you what to do.

0053 HO2S Heater Resistance Bank 1 Sensor 1
p0305 Cylinder 5 Misfire Detected
p0449 Evaporative Emission Vent Valve Solenoid Malfunction
u0107 Lost Communication With Throttle Actuator Control Module

Aug 23, 2015 | Buick Terraza Cars & Trucks

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I have codes 0122 0123 2104 2110 2111 2112 would it be the throttle body


Trouble Code: P0122

Throttle/Pedal Position Sensor A Circuit Low

Possible Causes:


Open ETC TP sensor harness.Short to ground in the ETC TP sensor harness.Damaged TP sensor.SIG RTN circuit open to the TP sensorPCM has failed


Trouble Code: P0123

Throttle/Pedal Position Sensor A Circuit High

Possible Causes:


TP sensor not seated correctly.TP sensor harness is short to voltage.TP sensor harness short to VREF.SIG RTN circuit open to the TP sensor.Damaged TP sensor.PCM has failed.Trouble Code: P2104

Throttle Actuator Control (TAC) System (Forced Idle)

Possible Causes:


Air cleaner and air inlet are not correctly seated.Check for self-test DTCs in all of the vehicle modules.Accelerator Pedal Position (APP) sensor.Throttle Position (TP) sensor.Manifold Absolute Pressure (MAP) sensor.PCM has failed.

Mustang 2006-2008
4.0L V6 VIN N Auto 12

Print


Trouble Code: P2008

Intake Manifold Runner Control (IMRC) Circuit Open (Bank 1)

Possible Causes:


IMRC monitor circuit open


Trouble Code: P2014

Intake Manifold Runner Position Sensor/Switch Circuit (Bank 1)

Possible Causes:


IMRC monitor circuit openMechanical concern - bind, seize, damage or obstruction of IMRC hardware


Trouble Code: P2015

Intake Manifold Runner Position Sensor/Switch Circuit Range/Performance (Bank 1)

Possible Causes:


Mechanical concern - bind, seize, damage, or obstruction of IMRC hardware


Trouble Code: P2019

Intake Manifold Runner Position Sensor/Switch Circuit (Bank 2)

Possible Causes:


IMRC monitor circuit openMechanical concern - bind, seize, damage, or obstruction of IMRC hardware


Trouble Code: P2020

Intake Manifold Runner Position Sensor/Switch Circuit Range/Performance (Bank 2)

Possible Causes:


Mechanical concern - bind, seize, damage, or obstruction of IMRC hardware


Trouble Code: P2065

Fuel Level Sensor B Circuit

Possible Causes:


Communication link concernDamaged Instrument Panel Cluster (IPC) (MKS)Damaged Instrument Cluster (IC)Damaged PCM


Trouble Code: P2066

Fuel Level Sensor B Circuit Range/Performance

Possible Causes:


Communication link concernDamaged Instrument Panel Cluster (IPC) (MKS)Damaged Instrument Cluster (IC)Damaged PCM


Trouble Code: P2067

Fuel Level Sensor B Circuit Low

Possible Causes:


Communication link concernDamaged Instrument Panel Cluster (IPC) (MKS)Damaged Instrument Cluster (IC)Damaged PCM


Trouble Code: P2068

Fuel Level Sensor B Circuit High

Possible Causes:


Communication link concernDamaged Instrument Panel Cluster (IPC) (MKS)Damaged Instrument Cluster (IC)Damaged PCM


Trouble Code: P2070

Intake Manifold Tuning Valve (IMTV) Stuck Open (Bank 1)

Possible Causes:


IMTV signal circuit shorted to PWR GND or SIG RTNDamaged IMRC actuatorPCM has failed


Trouble Code: P2071

Intake Manifold Tuning Valve (IMTV) Stuck Closed Bank 1

Possible Causes:


IMTV signal circuit shorted to PWR GND or SIG RTNDamaged IMRC actuatorIMTV circuit openPCM has failed


Trouble Code: P2072

Throttle Actuator Control (TAC) System (Ice Breakage)

Possible Causes:


Ice or oil in the intake air system could be the result of a Positive Crankcase Ventilation (PCV) system concern


Trouble Code: P2096

Post Catalyst Fuel Trim System Too Lean (Bank 1)

Possible Causes:


Loose connection, and damaged or corroded terminalsExhaust leaksContaminated HO2S


Trouble Code: P2097

Post Catalyst Fuel Trim System Too Rich (Bank 1)

Possible Causes:


Loose connection, and damaged or corroded terminalsExhaust leaksContaminated HO2S


Trouble Code: P2098

Post Catalyst Fuel Trim System Too Lean (Bank 2)

Possible Causes:


Loose connection, and damaged or corroded terminalsExhaust leaksContaminated HO2S


Trouble Code: P2099

Post Catalyst Fuel Trim System Too Rich (Bank 2)

Possible Causes:


Loose connection, and damaged or corroded terminalsExhaust leaksContaminated HO2S


Trouble Code: P2100

Throttle Actuator Control (TAC) Motor Circuit/Open

Possible Causes:


TAC motor has an open windingTAC motor is damagedTAC motor harness is openTAC motor harness is short to PWRTAC motor harness circuits are short togetherTAC motor harness connector is unplugged


Trouble Code: P2101

Throttle Actuator Control (TAC) Motor Range/Performance

Possible Causes:


TAC motor circuits are cross-wired


Trouble Code: P2104

Throttle Actuator Control (TAC) System (Forced Idle)

Possible Causes:


Air cleaner and air inlet are not correctly seatedCheck for self-test DTCs in all of the vehicle modules.Accelerator Pedal Position (APP) sensorThrottle Position (TP) sensorManifold Absolute Pressure (MAP) sensorPCM has failed


Trouble Code: P2105

Throttle Actuator Control (TAC) System (Forced Engine Shutdown)

Possible Causes:


Air cleaner and air inlet are not correctly seated.Check for self-test DTCs in all of the vehicle modules.Accelerator Pedal Position (APP) sensor.Throttle Position (TP) sensor.Manifold Absolute Pressure (MAP) sensor.PCM has failed.


Trouble Code: P2107

Throttle Actuator Control (TAC) Module Processor

Possible Causes:


TAC motor harness circuit short to ground.TAC motor harness circuit short to voltage.Damaged Electronic Throttle Body (ETB).PCM has failed.


Trouble Code: P2110

Throttle Actuator Control (TAC) System (Forced Limited RPM)

Possible Causes:


Air cleaner and air inlet are not correctly seated.Check for self-test DTCs in all of the vehicle modules.Accelerator Pedal Position (APP) sensor.Throttle Position (TP) sensor.Manifold Absolute Pressure (MAP) sensor.PCM has failed.


Trouble Code: P2111

Throttle Actuator Control (TAC) System (Stuck Open)

Possible Causes:


Binding throttle body, stuck open.TAC motor circuit open.TAC motor circuits are cross-wired.TAC motor harness circuits are shorted together.PCM has failed.


Trouble Code: P2112

Throttle Actuator Control (TAC) System - Stuck Closed

Possible Causes:


Binding throttle body, stuck open.TAC motor circuit open.TAC motor circuits are cross-wired.TAC motor harness circuits are shorted together.PCM has failed.

Oct 26, 2012 | 2006 Ford Mustang

1 Answer

Engine won't start and shows trouble code P1516 and reduced engine power light is on


Here is the definition of the code.

Possible causes - Faulty Throttle Actuator Control (TAC) module
- Throttle Actuator Control (TAC) module harness is open or shorted
- Throttle Actuator Control (TAC) module circuit poor electrical connection (loose or broken wires)

P1516 CHEVROLET Description The Throttle Actuator Control (TAC) module contains data which is essential for proper TAC operation. The TAC module continuously test the integrity of this data. When the TAC module is unable to write or read data to and from Random Access Memory (RAM), or the TAC module is unable to correctly read data from the flash memory or and internal TAC module processor fault is detected and the Detected Trouble Code (DTC) is set.
Read more: http://engine-codes.com/p1516_chevrolet.html#ixzz286Gl3cSo

Sep 28, 2012 | 2002 Chevrolet TrailBlazer

3 Answers

What doe the code u0107 mean?


U0107,code for this is Throttle actuator control (TAC) module serial data circuit, when you get this code the first action is measure battery voltage,if its low it comes on,Did you replace the PCM or did a reflash,these action will cause this code.To find and fix this you will need to measure app1 and app2 ,you basically looking for a open or short in the serial data circuit

Mar 15, 2012 | 2006 Pontiac Grand Prix

1 Answer

2009 Ford Fusion codes 2107,2110 car slows to 30mph and will no longer accelerate


Well, those codes definately are related to why your vehicle will no longer accelerate!

P2107 is "Throttle Actuator Control (TAC) Module Processor"
This code means that the TAC portion of the Powertrain Control Module (PCM) has failed the self-test.

Posiible causes:
> TAC motor circuit harness shorted to ground
> TAC motor circuit harness shorted to voltage
> Damage Electronic Throttle Body (ETB)
> Damaged PCM

P2110 is "Throttle Actuator Control (TAC) Forced Limited RPM"

This code is informational only. It sets in conjunction with other throttle actuator control codes (like P2107 above). It is just letting you know that the PCM is limiting RPM due to a TAC malfunction, (So it doesn't do a "TOYOTA" on you and run away!"

Jul 06, 2011 | Ford Fusion Cars & Trucks

1 Answer

Have a code on my 2007 ford fusion sel code p2111 TAC do you know what that is and what do i do to fix it. it would dont accellerate until i turned the motor off and turned back on. now it is ok still have...


P2111 PCM indicates the throttle plate is at a greater angle then commanded.

Possible causes:
- Binding in the Throttle Body, Stuck open,
- TAC Motor circuit are cross wired
- TAC Motor harness circuits are shorted together
- Damaged PCM unit.

Hope help with this.

Apr 19, 2010 | 2007 Ford Fusion I4 SEL Sedan

5 Answers

Engine goes to idle while driving


P2104 Throttle Actuator Control System - Forced Idle
P2106 Throttle Actuator Control System - Forced Limited Power
P2111 Throttle Actuator Control System - Stuck Open
P2112 Throttle Actuator Control System - Stuck Closed
P2135 Throttle/Pedal Position Sensor/Switch “A” /"B" Voltage Correlation
I looked it up and I will give you a web site I got it from http://www.f150online.com/forums/v8-engines/280570-p2104-p2106-p2111-p2112-p2135.html I hope this helps

May 25, 2009 | 2004 Ford Explorer

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