In this video I’ll show you how to use scan data and service information to diagnose a P0106 MAP/BARO Pressure Circuit Out of Range code on a 2005 Chevrolet Trailblazer. Reading and understanding the code information, as well as the Snap-On Troubleshooter, were key in repairing this fault. I also demonstrate how to safely clean an electronic throttle body, a very common feature on modern vehicles of all makes.
This false MAP sensor trouble code caused by a dirty throttle body in not unique to the Trailblazer. I have also seen this problem with other model GM vehicles as well.
Engine Performance Diagnostics chapter 20 pages 2 - 4, 12-14
Symptoms
- check engine light
- possible low idle, stalling
Fix
- cleaning and relearning the electronic throttle body
Tests shown
- using service information and flow charts to understand PCM code set criteria and diagnostic strategies
- using scan data to identify a dirty electronic throttle body
- inspecting and cleaning an electronic throttle body
- causes of a false MAP sensor trouble code
Tools used
- scan tool
- shop rag and carburetor/intake cleaner
Playlist
- (Chapter 20) Idle Speed Problems and Testing
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Related videos
- Chapter 20 “Idle Speed Controls - preview (an SD Premium video)
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- P0506 IAC System RPM below expected (vacuum leak) - Ford
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- False mass air flow/idle control system codes - vacuum leak - Pontiac
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- How to test an idle air control valve (IAC) using a Picoscope - Ford
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For more information on this topic, I have written a “field manual” called Engine Performance Diagnostics which is available at www.scannerdanner.com as an eBook or paper book.
Want even more diagnostic training? Whether you are a DIY trying to fix your own car, someone looking to become an auto technician, or a current auto technician that wants to get more into diagnostics, subscribe to ScannerDanner Premium [ Ссылка ] There is a 14 day free trial.
On ScannerDanner Premium I will bring you right into my classroom at Rosedale Technical College. You will find page for page lectures taken right from my book as well as exclusive classroom type case studies. What is so special about these classroom case studies? I pull live problem vehicles directly into my classroom and we troubleshoot them in real time, using and applying the theory and testing procedures we learn during the classroom lectures. There is no better on-line training of how to troubleshoot automotive electrical and electronics systems anywhere!
Disclaimer:
Due to factors beyond the control of ScannerDanner LLC, it cannot guarantee against unauthorized modifications of this information, or improper use of this information. ScannerDanner LLC assumes no liability for property damage or injury incurred as a result of any of the information contained in this video. ScannerDanner LLC recommends safe practices when working with power tools, automotive lifts, lifting tools, jack stands, electrical equipment, blunt instruments, chemicals, lubricants, or any other tools or equipment seen or implied in this video. Due to factors beyond the control of ScannerDanner LLC, no information contained in this video shall create any express or implied warranty or guarantee of any particular result. Any injury, damage or loss that may result from improper use of these tools, equipment, or the information contained in this video is the sole responsibility of the user and not ScannerDanner LLC.
