Question about 2004 Chevrolet TrailBlazer
Hi, ACCELERATOR PEDAL POSITION SENSOR VOLTAGE (4.2L) © 2008 Mitchell Repair Information Co., LLC. Throttle Position (1) Volts At Idle APP Sensor No. 1 Less Than 1.1 APP Sensor No. 2 Greater Than 3.9 Wide Open Throttle APP Sensor No. 1 Greater Than 2.0 APP Sensor No. 2 Less Than 3.0 (1) Measured at sensor or as seen on scan tool.
Your truck has a system that is called "throttle by wire" installed in it. What this means is that there is no actual throttle cable, the throttle plate is actually opened and closed by the computer. The reduced power light will come on when there is a problem somewhere in this system. If there is a loss of signal from any of the position sensors, the system will go into a reduced power mode and you will have virtually no power at all. Turning the vehicle off and back on will reset the fault until the next time the fault is present. A diagnostic trouble code will also be stored in the computer that will pinpoint where the failure was (or is.)
This is usually caused by a bad Accelerator Pedal Position Sensor (APP Sensor). It is located on a bracket above the accelerator (gas) pedal.
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ACCELERATOR PEDAL POSITION SENSOR VOLTAGE (4.2L)
© 2008 Mitchell Repair Information Co., LLC.
Throttle Position (1) Volts
APP Sensor No. 1 Less Than 1.1
APP Sensor No. 2 Greater Than 3.9
Wide Open Throttle
APP Sensor No. 1 Greater Than 2.0
APP Sensor No. 2 Less Than 3.0
(1) Measured at sensor or as seen on scan tool.
Posted on Jan 04, 2011
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Posted on Jan 02, 2017
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