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Throttle Code

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New User

Dec 15, 2017, 7:49 AM

Post #1 of 4 (1643 views)
Throttle Code Sign In

Hi everyone,

I just found out this forum and THANK YOU ALL for all the help you provide to each other

I am having some problems with my Chevy Malibu 2009 LS 2.4L with the code P2135. The car shakes and everything and the engine light is on, engine power reduced and stability traction. I am trying to figure out what is the problem exactly and try to fix it. I have already cleaned up the throttle body since that seemed to be the main problem online but I am trying to figure out if there is a sensor problem that I need to replace or connection issue because I read a lot of people replaced several parts and then still had the problem.

So these are the data I have and I really appreciate any help you can give

P2135 (Throttle / Pedal Posiion Sensor / Switch A/B Voltage Coorelation

Freeze Frame Readings:
FUELSYS2: N/A (since I have a 2.4 engine so no second system)
LOAD_PCT(%): 29.4
ECT(°F): 144
SHRTFT1(%): -3.1
LONGFT1(%): -0.8
MAP(inHg): 10.0
RPM(/min): 990
VSS(mph): 0
IAT(°F): 52
MAF(lb/min): 0.663
TP(%): 20.8
RUNTM(sec): 33
EVAP_PCT(%): 0.0
FLI(%): 40.4
CLR_DIST(mile): 0
EVAP_VP(inH2O): 0.440
BARO(inHg): 30.1
CATEMP11(°F): 924.80
VPWR(V): 14.965
LOAD_ABS(%): 24.0
EQ_RAT: 0.999
TP_R(%): 6.3
AAT(°F): 32
TP_B(%): 25.9
APP_D(%): 17.6
APP_E(%): 8.6
TAC_PCT(%): 9.4

Please if you are a mechanic or had a problem like this before please let me know. I appreciate any help or suggestion or recommendation.

Ultimate Carjunky / Moderator
Discretesignals profile image

Dec 15, 2017, 8:25 AM

Post #2 of 4 (1624 views)
Re: Throttle Code Sign In

Might be covered by the manufacture. You should call the dealer and make an appointment.

# 14582A: Special Coverage Adjustment - Throttle Body - Reduced Power Mode - (Oct 7, 2015)

Subject: 14582A - Special Coverage Adjustment - Throttle Body - Reduced Power Mode Models: 2008-2009 Buick Allure 2008-2011 Buick Enclave, LaCrosse 2009-2011 Buick Lucerne 2010-2011 Buick Regal 2008-2011 Cadillac CTS, SRX 2008-2009 Chevrolet Equinox, Uplander 2008-2011 Chevrolet Impala 2008, 2011-2012 Chevrolet Captiva 2008-2012 Chevrolet Colorado, Malibu 2009-2011 Chevrolet Traverse 2008-2012 GMC Canyon 2009-2011 GMC Acadia 2008-2010 Hummer H3 2009 Hummer H3T 2008-2009 Pontiac G8, Montana SV6, Torrent 2008-2010 Pontiac G6 2008 Saturn Outlook 2008-2009 Saturn VUE

The model involved in this bulletin have been revised. 2012 model year Buick Enclave, LaCrosse, Regal; Chevrolet Traverse, and GMC Acadia vehicles are not involved and have been removed from the model description. Please discard all copies of bulletin 14582.


On some 2008 model year (MY) Saturn Outlook; 2008-2009 MY Buick Allure, Chevrolet Equinox, Chevrolet Uplander, Pontiac G8, Pontiac Montana SV6, Pontiac Torrent, and Saturn VUE; 2008-2010 MY Hummer H3 and Pontiac G6; 2008-2011 MY Cadillac CTS, Cadillac SRX, and Chevrolet Impala; 2008, 2011-2012 MY Chevrolet Captiva; 2008-2011 MY Buick Enclave, Buick Lacrosse; 2008-2012 MY Chevrolet Colorado, Chevrolet Malibu, and GMC Canyon; 2009 MY Hummer H3T; 2009-2011 MY Buick Lucerne; 2009-2011 MY Chevrolet Traverse and GMC Acadia; and 2010-2011 MY Buick Regal vehicles, the throttle-position sensor may cause the engine to run rough, cause the malfunction-indicator lamp and/or an engine reduced power message to illuminate, and reduce the engine's power

Special Coverage Adjustment

This special coverage covers the condition described above for a period of 10 years or 120,000 miles (193,000 km), whichever occurs first, from the date the vehicle was originally placed in service, regardless of ownership.

Dealers are to replace the throttle body assembly and gasket for Bosch equipped vehicles, or to install the throttle position sensor kit for Hitachi equipped vehicles. The Hitachi throttle body assembly only needs to be replaced if the sensor kit does not correct the condition. The repairs will be made at no charge to the customer. For vehicles covered by Vehicle Service Contracts, all eligible claims with repair orders on or after September 24, 2015, are covered by this special coverage and must be submitted using the labor operation codes provided with this bulletin. Claims with repair orders prior to September 24, 2015, must be submitted to the Service Contract provider.

Vehicles Involved

All involved vehicles are identified by Vehicle Identification Number on the Applicable Warranties section in GM Global Warranty Management system. Dealership service personnel should always check this site to confirm vehicle involvement prior to beginning any required inspections and/or repairs. It is important to routinely use this tool to verify eligibility because not all similar vehicles may be involved regardless of description or option content.

Since we volunteer our time and knowledge, we ask for you to please follow up when a problem is resolved.

(This post was edited by Discretesignals on Dec 15, 2017, 10:33 AM)

New User

Jan 2, 2018, 10:51 PM

Post #3 of 4 (1562 views)
Re: Throttle Code Sign In

If I'm not mistaken, your A and B TPS are built in the throttle body...scan tool and actuate the throttle plate at 25% intervals and see if the tac motor moves the plate. If not, bad TB. JUST did one one a Terrain

Hammer Time
Ultimate Carjunky / Moderator
Hammer Time profile image

Jan 3, 2018, 5:33 AM

Post #4 of 4 (1556 views)
Re: Throttle Code Sign In


If you had actually read the previous answer you would have seen that there are 2 different styles, one style the TPS is built into the TB and the other it is separate.


We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.

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