1516 code w/engine light
Posted 21 December 2006 - 01:08 AM
Posted 21 December 2006 - 02:15 AM
Posted 21 December 2006 - 03:53 PM
Posted 22 December 2006 - 12:55 AM
Models: 2004-2006 Buick Rainer
2005-2006 Cadillac CTS-V
2003-2006 Cadillac Escalade
2003-2006 Chevrolet Avalanche, Corvette, Express, Monte Carlo, Silverado, SSR, Suburban, Tahoe, Trailblazer
2003-2006 GMC Envoy, Savana, Sierra, Yukon
2003-2006 Hummer H2
2005-2006 Pontiac GTO
Equipped with a 4.8 5.3 6.0 or 7.0 V-8 Engine
The following diagnosis might be helpful if the vehicle exhibits the symptom(s) described in this PI.
A vehicle may be brought into the dealer for a reduced power message, and DTCs P0120, P0220, P1516, P2101, or P2135.
The Throttle Actuator Control (TAC) / throttle body type trouble codes, may be caused by a loose wiring crimp at the throttle body connector, or a broken throttle body circuit.
Complete the current SI diagnostics for any symptoms or trouble codes found. If a intermittent T/P or TAC module type code is occurring complete the inspections below.
Inspect all related throttle body terminals for a loose wiring crimp. The loose crimp may be difficult to find, and the poor connection will be between the terminal and the copper strands of the wire. Wiggle test the individual throttle body circuits to see if the concern can be duplicated.
Inspect the related circuits for broken wires inside the insulation. The outer wire insulation may look fine, but the internal copper strands may be partially broken. Breaks in the wires usually occur within 1 to 4 inches of the throttle body connector. Wiggle testing may also induce a trouble code to set.
On C/K trucks complete SI procedures for voltage drop on grounds G103 and G104. Grounds G103 or G104 may be loose or corroded.
If a terminal crimp or a broken wire has been found, repair or replace only the circuits involved. There is a throttle body pigtail connector available through GMSPO, but installing this pigtail connector may cause other intermittent TAC module/TP codes at a later date. If this pigtail must be used, please follow the SI procedures for Splicing Copper Wire Using Splice Sleeves. (the proper Kent-Moore crimping tool must be used for this repair)
Please follow this diagnostic or repair process thoroughly and complete each step. If the condition exhibited is resolved without completing every step, the remaining steps do not need to be performed.
Posted 22 December 2006 - 01:14 AM
Posted 04 January 2007 - 11:41 PM
Just an update and observation of my dilemma. I purchased a Innova 3100 Code Reader and I'm seeing the following: one of the I/M Monitors is flashing, it's the EV symbol and I'm assuming it means it is the Evaporative System, (EVAP). This is flashing everytime I check the system and find the 1516 code. I'm also looking at the intake manifold and I see a loosley fitting valve standing upright and mounted to the intake right behinf the Throttle Body, is it suppoed to fit like that ?? The sticker on the fan shroud says it is a Evap Cannister Purge Valve. I'm wondering if this is part of my issue ??? Thanks for everybody's help, Mark Leigh
Mr 007, thanks very much I will go thru the recommendations you gave me this weekend. I'm glad this info exists as I've been racking my noodle to put a cause on these events, Mark
Posted 05 January 2007 - 01:25 AM
Posted 08 January 2007 - 10:18 PM
Posted 09 January 2007 - 10:27 PM
Is that near the firewall, and did you repair it by solder and shrink wrap the area broken only ?? Thanks, Mark
I have seen as many wiring problems if not more than throttle body issues, w/this code, also along w/the location in the yellow ckt in the bulletin, same ckt found a couple broken behind the intake manifold.
Posted 09 January 2007 - 11:22 PM
Posted 06 February 2007 - 07:38 PM
Just an update, I continued to drive it and have it occur now and then , no reason in particular, so I finally had it happen at 15 mph in town driving twice in 10 minutes and then took it to the dealer, they reprogrammed the unit and the truck ran better than it had in a while, but after a wek it appeared again, so I have had it at the dealer for days now and they are driving it several times a day with the recorder plugged in but it won't reoccur , of course, the dealer says they are now searching a database for histories ???? I have mentioned the TBS several times but they are hesitant to switch , they have went through the bulletins like are posted here, patiently waiting, Mark
actually, I cut out a section around the break, and add fresh wire using two butt connectors, and the style connectors I use are shrink wrap in them, vinyltape after that and no problems
Posted 07 February 2007 - 02:39 AM
Posted 15 February 2007 - 12:08 AM
Well to ROYG and all , the dealer installed a new throttle body and 1000 miles later the problem has not reoccured, I want to thank all of you for your input and I will continue to read this site and hope to contribute some , thanks , Mark
well i see that you are still trying to fix this problem, mmmmmmmmmmmmm. So you checked that yellow wire? did you find the problem? guess not because it is still happening. Should have just changed the throttle body. Well i guess it's in the dealers hand now. I hope you don't get a big repair bill. If the ESI steps are followed one leads to changing the throttle body. Well good luck my friend and hope this gets fixed soon.
Posted 16 February 2007 - 05:19 AM
Posted 16 February 2007 - 09:52 AM
The Throttle body and install, along with 50 miles of driving it with the recorder on, updating the onboard computer, inspection and testing the wires and and grounds, was 650.00 ------------------
hip hip hooray! good finally got it fixed. Just curious how much was the bill?
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