Q: Hi. Not sure if your diagnostics are free. We own an Izuzu Trooper, and recently, we have been getting a "reduced power" light, wh

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Are you diagnostics free? We own an Izuzu Trooper. Recently, the vehicle started to sometimes shut off during stops. We also noticed some jolts, while driving, and a light would come on, that read "Reduced Power" Is this something you guys have dealt with, and what is the price range?
My car has an automatic transmission.

The issue you are writing in about is common enough that a specific diagnostic, namely a reduced engine power diagnostic is performed by technicians dispatched by YourMechanic. The diagnostic cost is around $80 to $90, depending on zip code (if you click on the reduced power service link and input your zip code, you will get an instant quote). The repair cost depends on exactly what is wrong and could reflect anything from simply a quickly found loose wire to replacement of more complex parts). Typically, there is a simple and limited cause and if you request the reduced power diagnostic, the responding certified mechanic will definitely get the root cause identified. In most cases, the vehicle’s powertrain control module (PCM) has stored one or more diagnostic trouble codes that will identify the "general area" in which the fault lies in the engine management controls. Although the throttle control system is a common trouble area with reduced power, there are quite a few other components and systems that could come into play and, of course, there is always the possibility of multiple, or "coincident", faults. Here are some of the possibilities that YourMechanic dispatched technicians would consider:


Defective throttle position (TP) sensor
Defective oxygen sensor
Defective accelerator pedal position (APP) sensor
Loose or damaged wiring
Defective throttle body
Defective powertrain control module (PCM) (not typical; ONLY if a long, long list of other possibilities is ruled out)
Any fault/error that will affect drivability function
Any fault/error that will affect vehicle performance
A fault/error in the emissions system
A fault/error in the throttle control system
A fault/error in the transmission control system


If you have further questions or concerns, do not hesitate to re-contact YourMechanic as we are always here to help you.

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