My truck is reading 2 codes P0234 and P0540


My truck is reading 2 codes P0234 and P0540 Mechanic's Assistant: Just to clarify, what's the exact code? And have you tried to reset it? Those were the codes i that came up on the obd2 reader at oreillys no i didnt delet...

My truck is reading 2 codes P0234 and P0540 Mechanic's Assistant: Just to clarify, what's the exact code? And have you tried to reset it? Those were the codes i that came up on the obd2 reader at oreillys no i didnt delete or reset them Mechanic's Assistant: What is the make/model/year of your car? Gmc sierra 2500 hd 2002 or just 02 lb7 for engine model Mechanic's Assistant: Are you fixing your Sierra 2500 HD yourself? What have you tried so far? No i wont because im not knowledgeable or have the correct diagnostic tools to check the turbo and intake heater Mechanic's Assistant: Anything else you want the Mechanic to know before I connect you? That should cover it

Automotive Expert
Hello and welcome to Just Answer. I'm Paul, And happy to help you with your question today. p0234 is most often a bad Boost Sensor [https://peapull.com/o/1610481018.pdf](https://peapull.com/o/1610481018.pdf) See testing information below [https://peapull.com/o/1610481036.pdf](https://peapull.com/o/1610481036.pdf) p0540 is most often a faulty intake heater relay or wiring issue see below. If you need more help just reply, and let me know. Thank you, Paul

im not even a weekend warrior when it comes to turning a wrench. would a mechanic typically charge a lot to diagnose these problems?
Automotive Expert
the diagnostic charge would generally be between $100-130 and the parts should be under 100 each. So I would print the reports and bring those to the shop. or if you want to just ask for the boost sensor and relay without a diagnostic that might save you money but they wont guarantee the diagnosis. but I can tell you the chances are those two parts are bad are extremely high the diagnostic charge would generally be between $100-130 and the parts should be under 100 each. So I would print the reports and bring those to the shop. or if you want to just ask for the boost sensor and relay without a diagnostic that might save you money but they wont guarantee the diagnosis. but I can tell you the chances are those two parts are bad are extremely high

i believe it i dont believe mine have ever been replaced and the truck is at 275k miles now i will print this thank you for your time.
Automotive Expert
No problem glad I could help thank you for using Just Answer. Paul

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