Question about 2003 Cadillac Escalade Esv

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2002 cadilac escalade ext 6.0 Reduced engine power dtc p1516 comes on no other codes stored in pcm. service stability light is on along with service air ride system.you can drive about 1.8 miles to up to 5 miles then the reduced power check engine light and the traction control light comes on. there are also co196,c0186,c0279. done every thing new tac module etc...

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6ya6ya
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Posted on Jan 02, 2017

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localwonder
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SOURCE: service stability system light wont go off n 2002 escalade

Hi. this is a very important alert. the stability system on this suv is very sophisticated. there are many sensors that work together with other modules and control units to keep this SUV from rolling over during an abrupt action, due to an extreme situation.This light is warning you of a appending fault that is occurring in one or more of the sensors on board. the best solution is to take your suv to the dealership for a brisk cpu scan. This way, you can find put which sensor it is that is malfunctioning and fix it.

Please rate and god bless:)

Posted on Apr 02, 2009

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SOURCE: 2005 Cadillac Escalade service ride control

I have a 2003 Escalad and my SERVICE RIDE CONTROL" say on

Posted on Aug 31, 2009

  • 1 Answer

SOURCE: abs light/traction control light

You can check out what the trouble code is by pushing and holding the information button and the up arrow (right side of instrument cluster above the radio) until all the instrument clusters light. Press the information button (last) to enter test mode. I've had an error C1234, meaning Left rear wheel sensor fault. I found the problem to be a corroded connector under the chasis just under the rear left door about 2 feet in. I had to by-pass (replace 1 wire due to corrosion at the connector.

Posted on Sep 15, 2009

  • 1 Answer

SOURCE: 2002 Cadillac Escalade Service Stability System Light comes on

The problem is the wheel bearings that have the ABS sensor attached. Check the computer for the code as there is also an up date for the wiring sytem with a jumper for $60 fix that possible could solve the problem.

Posted on Nov 20, 2009

bluebirdmate
  • 1190 Answers

SOURCE: 2002 escalade service stability system. Is there

Hello: To repair you need to know the code so you know what component is malfunctioning. Many things can bring the light on. Most generic scanners can not access the stability system. GM Tech 2 can.

Posted on Jan 10, 2011

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Error codes 2101 and 1516 on my 2004 chevy trailblazer


DTC P2101-
The commanded throttle position (TP), based on accelerator pedal position (APP) and possibly other limiting factors, is compared to the actual TP. The 2 values should be within a calibrated range of each other. Both the powertrain control module (PCM) and the throttle actuator control (TAC) module redundantly monitor the commanded and actual TP. This DTC sets if the PCM detects an out-of-range condition between commanded and actual throttle position.
DTC P1516
The predicted throttle position (TP) is compared to the actual throttle position. The two values should be within a calibrated range of each other. Both the powertrain control module (PCM) and the throttle actuator control (TAC) module redundantly monitor the predicted and actual throttle position. This DTC sets if the PCM detects an out of range condition between the predicted and actual throttle position.

Do you know what electronic throttle control is ?

Pt 1 2007 Chevy 2500HD Reduced Engine Power Warning Fault Code P1516...

Jul 31, 2017 | Cars & Trucks

1 Answer

When I push my gas pedal down about one inch the reduced power light comes on it don't stall just reduced power you shut the truck off restart it the light is off ,


The reduced power light is pertaining to the TAC - electronic throttle control . Is the check engine light lit ? If not still may have a DTC -diagnostic trouble code stored . You probably have a bad TPS - throttle position sensor .
Throttle Body Assembly
The throttle body for the throttle actuator control (TAC) system is similar to a conventional throttle body with several exceptions. One exception being the use of a motor to control the throttle position instead of a mechanical cable. Another exception is the throttle position (TP) sensor. The TP sensor is mounted in the throttle body assembly. The TP sensor is 2 individual TP sensors within the throttle body assembly. Two separate signal, low reference, and 5-volt reference circuits are used to connect the TP sensors and the powertrain control module (PCM). TP sensor 2 signal voltage increases as the throttle opens. TP sensor 1 signal voltage decreases as the throttle opens.

Dec 31, 2015 | 2002 Chevrolet Chevrolet TrailBlazer EXT...

1 Answer

I just bought an 2004 Tahoe LT and the reduced engine power light is on. And, the stability sys disabled light is on what does this mean


It means you have a problem with the electronic throttle control an with Stability control which is part of the electronic brake control module ,which means there are DTC'S - diagnostic trouble codes stored in the ( EBCM ) & in the PCM -powertrain control module . You should take to a ASE certified repair facility or the dealer !

Aug 23, 2015 | Cars & Trucks

1 Answer

What causes the "Reduced Engine Power", "Service Stability Control" and "Traction Control" warning lights to come on?


the "Reduced Engine Power", problem causes the PCM to disable "Service Stability Control" and "Traction Control" turning on the warning lights to come on for those systems . The reduced engine power is because of a problem with the electronic throttle control system or as GM calls it TAC system . Reduced Engine Power Mode
When the PCM detects a condition with the TAC system, the PCM may enter a reduced engine power mode. Reduced engine power may cause one or more of the following conditions:
• Acceleration limiting--The PCM will continue to use the accelerator pedal for throttle control, however, the vehicle acceleration is limited.
• Limited throttle mode--The PCM will continue to use the accelerator pedal for throttle control, however, the maximum throttle opening is limited.
• Throttle default mode--The PCM will turn OFF the throttle actuator motor and the throttle will return to the spring loaded default position.
• Forced idle mode--The PCM will perform the following actions:
- Limit engine speed to idle by positioning the TP, or by controlling the fuel and spark if the throttle is turned OFF.
- Ignore the accelerator pedal input.
• Engine shutdown mode--The PCM will disable fuel and de-energize the throttle actuator.
© 2017 General Motors Corporation. All rights reserved.



Drive by Wire training Your best bet , take it to a GM dealer

Mar 04, 2017 | 2005 Pontiac Grand Prix GT

1 Answer

Stability system disabled light on no power


The stability system is software programmed into the ABS - antilock brake control module also the PCM - engine computer . service engine light DTC'S - diagnostic trouble codes stored . Your best bet , take it to a qualified repair shop or the dealer . You don't have the diagnostic equipment or knowledge to tackle this type of problem .

Jul 24, 2017 | 2003 GMC Yukon Denali

1 Answer

Check engine light, low engine power


You get a reduced power message ? Your vehicle has electronic throttle control or also known as drive by wire . Your gas pedal is electrically hooked to the PCM - engine computer . Has two position sensors inside as does the throttle body on the engine . Over time these position sensors wear an cause improper signals to the computer an the computer will put the vehicle into a limp mode . Most cases it will drive but only at about 20 mph . There are videos on youtube showing how this works , how to diagnose etc....
This P0449 is something different , has to do with the Evap. emissions .
DTC P0449 Evaporative Emission (EVAP) vent Solenoid Control Circuit . Planty of videos on youtube for GM trucks on this problem .
DTC P1516 Throttle Actuator Control (TAC) Module Throttle Actuator Position Performance
The predicted throttle position (TP) is compared to the actual throttle position. The two values should be within a calibrated range of each other. Both the powertrain control module (PCM) and the throttle actuator control (TAC) module redundantly monitor the predicted and actual throttle position. DTC P1516 sets if the PCM detects an out of range condition between the predicted and the actual throttle position.
Look's like you have three different problems , Thought p1516 an p1258 were going to point to same electronic throttle problem .

P1258
Engine Coolant Overtemperature - Protection Mode Active
PCM
DTC P1258

Circuit Description
The powertrain control module (PCM) uses the ECT sensor to monitor the engine for an over temperature condition. This condition occurs when the coolant temperature is above 132°C (270°F). When an over temperature condition is present, DTC P1258 will set. The PCM will disable two groups of four cylinders by turning OFF the fuel injectors. By switching between the 2 groups of cylinders, the PCM is able to reduce the temperature of the coolant.

Check the engine cooling fans for proper operation.
Are the engine cooling fans operative? Have you ever had the thermostat changed ? Is the coolant full ?

Check out youtube videos ! Just type your codes into the search bar .

May 02, 2017 | 2006 Chevrolet Silverado 2500HD 2WD

2 Answers

2007 chevy tahoe loses power


No messaage of reduced engine power ? Your vehicle has electronic throttle control . Has four position sensors , two are located in the gas pedal ,an two in the throttle body . The PCM uses these sensor to know how much to open the throttle plate ,allowing more air into the engine . How did you read this code an where did you read it's definition at ? This is not a code for your vehicle . Some time cheap code readers get them wrong .
DTC P2120: Accelerator Pedal Position (APP) Sensor 1 Circuit
DTC P2122: Accelerator Pedal Position (APP) Sensor 1 Circuit Low Voltage
DTC P2123: Accelerator Pedal Position (APP) Sensor 1 Circuit High Voltage
DTC P2125: Accelerator Pedal Position (APP) Sensor 2 Circuit
DTC P2127: Accelerator Pedal Position (APP) Sensor 2 Circuit Low Voltage
DTC P2128: Accelerator Pedal Position (APP) Sensor 2 Circuit High Voltage
DTC P2138: Accelerator Pedal Position (APP) Sensor 1-2 Correlation

DTC P1516: Throttle Actuator Control (TAC) Module Throttle Actuator Position Performance
DTC P2101: Throttle Actuator Position Performance
DTC P2119: Throttle Closed Position Performance
DTC P2176: Minimum Throttle Position Not Learned

If one of this position sensors is bad it will throw the PCM into a
Reduced Engine Power Mode
When the ECM detects a condition with the TAC system, the ECM may enter a reduced engine power mode. Reduced engine power may cause one or more of the following conditions:
• Acceleration limiting--The ECM will continue to use the accelerator pedal for throttle control; however, the vehicle acceleration is limited.
• Limited throttle mode--The ECM will continue to use the accelerator pedal for throttle control; however, the maximum throttle opening is limited.
• Throttle default mode--The ECM will turn off the throttle actuator motor and the throttle will return to the spring loaded default position.
• Forced idle mode--The ECM will perform the following actions:
- Limit engine speed to idle by positioning the throttle position, or by controlling the fuel and spark if the throttle is turned off.
- Ignore the accelerator pedal input.
• Engine shutdown mode--The ECM will disable fuel and de-energize the throttle actuator.


017 Accelerator Pedal Position Sensors
Drive by Wire Function and diagnostics by Wells

Jan 01, 2018 | 2002 Oldsmobile Silhouette

1 Answer

P2101 and p1516


1. This engine uses the Throttle Actuator Control (TAC) system. Thoroughly clean the throttle bore and throttle plate.

2. Inspect the air intake system for a missing or contaminated air filter

there is also a tsb on it TSB 07-06-04-003 for p1516 that involves replacing the pcm

Subject:LSJ, L61, LK5, L52, LL8 Engine -- Reduced Engine Power, MIL/SES Light, DTC P1516, P2135, P2138 (Replace PCM)

Models:2005-2006 Chevrolet Cobalt, Cobalt SS, Malibu
2006 Chevrolet Colorado, TrailBlazer
2006 GMC Canyon, Envoy
2006 HUMMER H3
2005-2006 Saturn ION, ION Red Line
2006 Saab 9-7X
with ECOTECTM 2.0L, 2.2L I-4 Cylinder Engine (VINs P, F-- RPOs LSJ, L61) or
VORTECTM 2.8L I-4, 3.5L I-5, 4.2L I-6 Cylinder Engine (VINs 8, 6, S -- RPOs LK5, L52, LL8)



Attention: The following bulletin information is only to be used if the customer has returned for REPEAT repairs for DTCs P1516, P2135 and/or P2138.



Condition

Some customers may comment on engine operation in the Reduce Engine Power mode with the MIL/SES light illuminated. This condition may be repeated and upon investigation, the technician may find the following DTCs set as current or in history:

• DTC P1516 Throttle Actuator Control (TAC) Module Throttle Actuator Position Performance
• DTC P2135 Throttle Position (TP) Sensor 1-2 Correlation
• DTC P2138 Accelerator Pedal Position (APP) Sensor 1-2 Correlation
Cause

This condition of a repeat DTC P1516, P2135 and/or P2138 may be caused by an internal concern with the PCM.
Correction



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Important: DO NOT replace the APP sensor. Inspect the PCM build date first.

Before following the diagnostic information in SI on DTCs P1516, P2135 and/or P2138, an inspection of the PCM serial number year and Julian (PCM build) date will be necessary to determine if the PCM will need to be replaced to correct the repeat DTC P1516. Refer to Engine Control Module Replacement in SI in order to remove the PCM. Refer to the above graphic illustration (1) for the location of the PCM serial number.

The serial number is read left to right. The last digit of the year is the 9th character and the Julian date is comprised of the 10th, 11th and 12th characters and is used to determine the PCM build date. Refer to the example below to read a build date from the PCM serial number:

* 8 6 Y N AU K 1 5 3 2 5 0 R P N *

If the PCM year and Julian dates are between 5182 and 5304 , replace the PCM. Refer to the Part Catalog to order the correct PCM for your vehicle application, if necessary.

Vehicles with PCM built outside the dates should refer to SI diagnostics for DTCs P1516, P2135 and/or P2138

Dec 13, 2012 | 2006 Chevrolet Cobalt

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

2 Answers

THE SERVICE STABILITY SYSTEM LIGHT STAY ON, I HAVE 2002 CADILLAC TRUCK EXT


Whats dose it mean went I have my service stability system light on and it dosent trun off .. I have a Cadillac escalade truck 02 All wheel drive hope some one could help me.......

Oct 02, 2010 | 2002 Cadillac Escalade Ext

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