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Author Topic: Low Power Mode and Stabilitrak light when Heavy Rain  (Read 181 times)

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pdorazio

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Hello All, last year on the hwy in a snowstorm my truck went into low power mode and then died.  After an hour it started and drove fine. It did it again 2 weeks later in a rainstorm while driving Code was TPS sensor. I replaced the entire throttle body with AC Delco parts and had no other issues.  Lately many sensors have gone including ABS/wheel speed, oil pressure, oil level, airbag, etc.  all replaced except for oil pressure (gauge not working for a few months now).
So last night it POURED rain.  Car sitting parked.  WOuldnt start this morning.  When cranking "low power mode" then click click click.  Battery jump did nothing.  Now it starts in low power mode.  I can only assume a connector under the car is wet, or maybe where water drains thru cowl?  Can some one lead me to a likely culprit?
Man, do I need a Tundra!
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enoniam

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Re: Low Power Mode and Stabilitrak light when Heavy Rain
« Reply #1 on: 04/16/18 04:53 PM »

I dunno.  Mine's never done that in 15 years, 314K miles.

Then again, I've never wanted a Toyota.
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2003 with ATK 460 HP 6.0, Speed Engineering Long Tube Headers and true dual 3" exhaust, Truetrac rear, 3200 Circle Stall, tranny upgraded with 4L65 and other heavy-duty parts, Weld Racing 18x10 forged wheels, HPTuners custom tune, Vortech supercharger, water/meth injection, Magnavolt fuel pump voltage booster, DeatschWerks booster fuel pump, 58#/hr injectors, 13.3 @ 101 in the quarter mile.

jonsadams

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Re: Low Power Mode and Stabilitrak light when Heavy Rain
« Reply #2 on: 04/16/18 06:08 PM »

Check this link, My 2010 Avalanche did the same thing in January. Basically they change the throttle position sensor, and reflash the engine control module. There are two throttle position sensors in the throttle body. The engine control module looks at both of them, if it detects a difference between the two, it will go into the reduced power mode. Mine only happened when the ambient temperature was below about 25 deg.

https://f01.justanswer.com/El_Jared/6d57ae19-57ed-4e04-a31e-5ade5820f768_throttle+body+TSB.pdf


Document ID: 3671085
#11273B: Special Coverage Adjustment - Throttle
Position Sensor Replacement - (Dec 16, 2013)
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MS03 2500

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Re: Low Power Mode and Stabilitrak light when Heavy Rain
« Reply #3 on: 04/17/18 11:25 AM »


In my case, it was the throttle actuator control. A pretty dumb place to install it with the plugs facing up.

In any case, carefully pull off the plugs and check for corrosion then put some grease on the seal of the plugs.

http://www.chevyavalanchefanclub.com/cafcna/index.php?topic=75809.msg1163607#msg116360

I keep a code reader in my storage bin so I can just clear the code and problem is solved.

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