Yellow Bullet Forums banner

1 - 14 of 14 Posts

·
Registered
Joined
·
445 Posts
Discussion Starter #1
I have a 2002 denali that keeps getting a reduced engine power light randomly the main code is P 1518. the shop has tried a second throttle body they also tried a throttle accuation module can anybody help with this? They also checked the grounds?? sometimes the vehicle runs fine for a little while other times light comes on as soon as you start it up
 

·
Registered
Joined
·
16,880 Posts
buddy went thru the same thing. 2 aftermarket TB'S and finally put a delco on and its been good for months now
 

·
Registered
Joined
·
3,946 Posts
Wiggle the electrical connections at the throttle body and also the gas pedal itself while the car is running. If you have availability to a tech 2, keep an eye on requested pedal position to actual throttle position, I have seen a few gas pedal sensors go bad also, any glitch in any of those will cause REP immediately as a safety.
 

·
Registered
Joined
·
3,794 Posts
Roger Johnson
July 18, 2013
2003 Chevrolet Silverado 2500 HD, 6.0L, GAS, Vin U *
Throttle Body - replaced theottle bore runs great now
Throttle Body Eddie Dudik
August 07, 2012
2005 Chevrolet Silverado 2500 HD, 6.0L, GAS, Vin U *
Throttle Body - Repl throttle body.
Throttle Body Greg Ashcraft
February 12, 2010
2003 Chevrolet Silverado 2500 HD, 6.0L, GAS, Vin U *
Throttle Body
127,000 miles Throttle Body Tom Trosiek
March 16, 2007
2003 Chevrolet Silverado 2500 HD, 6.0L, GAS, Vin U *
Throttle Body - throttle body
Throttle Body David Thordarson
October 20, 2010
2002 GMC Sierra 2500 HD, 6.0L, GAS, Vin U *
Accelerator Pedal Position (APP) Sensor - accelerator pedal position sensor
Accelerator Pedal Position (APP) Sensor David Thordarson
July 20, 2010
2005 Chevrolet Silverado 2500 HD, 6.0L, GAS, Vin U *
Accelerator Pedal Position (APP) Sensor - accelerator pedal postion sensor
Accelerator Pedal Position (APP) Sensor Carl Hoelscher
March 31, 2009
2003 Chevrolet Silverado 2500 HD, 6.0L, GAS, Vin U *
Accelerator Pedal Position (APP) Sensor - INTERMITTENT CONDITION. REPLACED THROTTLE PEDAL ASSEMBLY AFTER ADVISING CUSTOMER OF PATTERN FAILURES
Accelerator Pedal Position (APP) Sensor Mike Ferrini
April 28, 2011
2003 Chevrolet Silverado 2500, 6.0L, GAS, Vin U, USA/Canada *
Throttle Body Connector - cleaned electrical connections at throttle body, wet due to engine being pressure washed
Throttle Body Connector Charles Bowden
July 14, 2010
2005 Chevrolet Silverado 2500 HD, 6.0L, GAS, Vin U *
Throttle Body Connector - loss of power and codes p2135,p2101 found open gray wire 1/2 inch from throttle body connector
Throttle Body Connector GressesAuto
January 04, 2010
2003 Chevrolet Silverado 2500 HD, 6.0L, GAS, Vin U *
Throttle Body Connector - found harness to t-body broken yellow wire 1 inch from connector replaced connector
Throttle Body Connector Alan Molitoris
April 30, 2009
2004 Chevrolet Silverado 2500, 6.0L, GAS, Vin U, USA/Canada *
Throttle Position Sensor (TPS) Connector - TPS CONECTION
Throttle Position Sensor (TPS) Connector Roy Alexander
January 15, 2009
2004 Hummer H2, 6.0L *
Throttle Position Sensor (TPS) Connector - WATER IN CONNECTOR AT TPS CUSTOMER SAID HAD VEHICLE DETAILED ENGINE CLEANED DRIED CONNECTION CLEARED CODES WAS FINE
Throttle Position Sensor (TPS) Connector Jason Vipperman
September 25, 2006
2003 Chevrolet Silverado 2500 HD, 6.0L, GAS, Vin U *
Wire - BROKEN YELLOW WIRE AT THROTTLE BODY CONNECTOR COULD NOT SEE BREAK IN WIRE IT WAS BROKEN ABOUT 1 INCH DOWN WIRE INSIDE OF PLASTIC WIRE COATING
Wiring Jeff Bouvier
June 26, 2006
2003 Chevrolet Silverado 2500 HD, 6.0L, GAS, Vin U *
Wiring
- Yellow wire was broken about 1 inch from the connector.

130,000 miles Wiring Ryan Karns
December 19, 2012
2003 Hummer H2, 6.0L *
Battery - REPLACED BATTERY
Battery JENSENTIRE26A
October Roger Johnson
July 18, 2013
2003 Chevrolet Silverado 2500 HD, 6.0L, GAS, Vin U *
Throttle Body - replaced theottle bore runs great now
Throttle Body Eddie Dudik
August 07, 2012
2005 Chevrolet Silverado 2500 HD, 6.0L, GAS, Vin U *
Throttle Body - Repl throttle body.
Throttle Body Greg Ashcraft
February 12, 2010
2003 Chevrolet Silverado 2500 HD, 6.0L, GAS, Vin U *
Throttle Body
127,000 miles Throttle Body Tom Trosiek
March 16, 2007
2003 Chevrolet Silverado 2500 HD, 6.0L, GAS, Vin U *
Throttle Body - throttle body
Throttle Body David Thordarson
October 20, 2010
2002 GMC Sierra 2500 HD, 6.0L, GAS, Vin U *
Accelerator Pedal Position (APP) Sensor - accelerator pedal position sensor
Accelerator Pedal Position (APP) Sensor David Thordarson
July 20, 2010
2005 Chevrolet Silverado 2500 HD, 6.0L, GAS, Vin U *
Accelerator Pedal Position (APP) Sensor - accelerator pedal postion sensor
Accelerator Pedal Position (APP) Sensor Carl Hoelscher
March 31, 2009
2003 Chevrolet Silverado 2500 HD, 6.0L, GAS, Vin U *
Accelerator Pedal Position (APP) Sensor - INTERMITTENT CONDITION. REPLACED THROTTLE PEDAL ASSEMBLY AFTER ADVISING CUSTOMER OF PATTERN FAILURES
Accelerator Pedal Position (APP) Sensor Mike Ferrini
April 28, 2011
2003 Chevrolet Silverado 2500, 6.0L, GAS, Vin U, USA/Canada *
Throttle Body Connector - cleaned electrical connections at throttle body, wet due to engine being pressure washed
Throttle Body Connector Charles Bowden
July 14, 2010
2005 Chevrolet Silverado 2500 HD, 6.0L, GAS, Vin U *
Throttle Body Connector - loss of power and codes p2135,p2101 found open gray wire 1/2 inch from throttle body connector
Throttle Body Connector GressesAuto
January 04, 2010
2003 Chevrolet Silverado 2500 HD, 6.0L, GAS, Vin U *
Throttle Body Connector - found harness to t-body broken yellow wire 1 inch from connector replaced connector
Throttle Body Connector Alan Molitoris
April 30, 2009
2004 Chevrolet Silverado 2500, 6.0L, GAS, Vin U, USA/Canada *
Throttle Position Sensor (TPS) Connector - TPS CONECTION
Throttle Position Sensor (TPS) Connector Roy Alexander
January 15, 2009
2004 Hummer H2, 6.0L *
Throttle Position Sensor (TPS) Connector - WATER IN CONNECTOR AT TPS CUSTOMER SAID HAD VEHICLE DETAILED ENGINE CLEANED DRIED CONNECTION CLEARED CODES WAS FINE
Throttle Position Sensor (TPS) Connector Jason Vipperman
September 25, 2006
2003 Chevrolet Silverado 2500 HD, 6.0L, GAS, Vin U *
Wire - BROKEN YELLOW WIRE AT THROTTLE BODY CONNECTOR COULD NOT SEE BREAK IN WIRE IT WAS BROKEN ABOUT 1 INCH DOWN WIRE INSIDE OF PLASTIC WIRE COATING
Wiring Jeff Bouvier
June 26, 2006
2003 Chevrolet Silverado 2500 HD, 6.0L, GAS, Vin U *
Wiring
- Yellow wire was broken about 1 inch from the connector.

130,000 miles Wiring Ryan Karns
December 19, 2012
2003 Hummer H2, 6.0L *
Battery - REPLACED BATTERY
Battery JENSENTIRE26A
October
 

·
Creepy Ass ******
Joined
·
5,801 Posts
Check/clean the grounds on the back of the heads, separate the wire loom coming off the throttle body and wiggle test each wire for breaking inside the insulation.
 

·
Registered
Joined
·
445 Posts
Discussion Starter #8
They checked grounds and said good. They did not replace pigtail.
 

·
Registered
Joined
·
1,023 Posts
Pigtail off of the throttle body... Yellow wire is known to break inside the insulation. I've also had to run a new harness from the module to the T/B, but that was the last resort
 

·
Registered
Joined
·
445 Posts
Discussion Starter #10
Are these the wires to tb motor or to the tps sensor???
 

·
Real Estate Tycoon
Joined
·
16,959 Posts
Take the bulb out. :-D
 

·
Registered
Joined
·
445 Posts
Discussion Starter #12
Wish that worked but the engine power derates to like 30% when this light comes on
 

·
Real Estate Tycoon
Joined
·
16,959 Posts
I know. I was just joking.
 

·
Registered
Joined
·
1,023 Posts
Wires that break are at the throttle body. About 6" or so back from the connector, 6 wire plug is on the T/B
 
1 - 14 of 14 Posts
Top