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I need an electric guy for the following issues, codes: 24,

I need an electric...

I need an electric guy for the following issues, codes: 24, Air flow meter (resistor), 27, Oxygen sensor, 31, air flow meter circuit, and 52, Knock sensor signal, wire missing

Mechanic's Assistant: Okay, I'll connect you to the Mechanic to go over that information regarding your Toyota. Before I do, is there anything else you want him to know?

Its for an 89 Toyota P/U with a 22RE engine fresh overhaul.

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Answered in 2 minutes by:
2/3/2021
Toyota Mechanic: Boxer54, Toyota Technician replied 1 year ago
Boxer54
Boxer54, Toyota Technician
Category: Toyota
Satisfied Customers: 1,810
Experience: ASE Master tech with L1 certification, Toyota Master Diagnostic Technician
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Thank you for trusting us with your questions. I will do my best to assist you. Were you experiencing any of these codes before installing the engine?

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Customer reply replied 1 year ago
O2 yes all others not observed as these are notes from the repair shop. I guess
Toyota Mechanic: Boxer54, Toyota Technician replied 1 year ago

Will the enigine start and run? Have they cleared codes to see what returns?

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Customer reply replied 1 year ago
He stated I needed and electrical guy. Why couldnt he do it?The Truck starts up and runs but there is no signal code, just a check engine light, those are the mechanics notes that I have. I would think that should be part of the overhaul.It for sure is worthy of a second review.
Toyota Mechanic: Boxer54, Toyota Technician replied 1 year ago

Im not sure what you are asking for. The codes you have listed require some basic checks and diagnosis to get us pointed in the right direction. Since I cannot come to you and put my hands on your vehicle, you must be my hands, eyes, and ears. This is why we ask questions to give you the best advice we can offer. Is he referring to the 5 volt VC (voltage constant) reference signal to the sensors?

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Customer reply replied 1 year ago
I think he said the red wireArent all 4 wires part of the O2 system?
Toyota Mechanic: Boxer54, Toyota Technician replied 1 year ago

What you need to do to help me with this is find out for sure if the 5 volt reference voltage is what is missing? With that information, I can give guidance on diagnosing the issue. There are multiple red wires all over this vehicle.

You have codes for the oxygen sensor, knock sensor, intake air temp sensor, and air flow meter. These sensors are located in 3 very different and distinct locations.

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Customer reply replied 1 year ago
Ok and thank you and will look for that info.
Toyota Mechanic: Boxer54, Toyota Technician replied 1 year ago

Let me know when you find out if it is missing the 5 volt reference voltage, or if it is something else. My gut tells me there is a pinched wiring harness, most likely towards the back of the cylinder head where the engine and transmission coome together. Could possibly be something else though. Will be better able to advise knowing about that reference voltage.

Boxer54
Boxer54, Toyota Technician
Category: Toyota
Satisfied Customers: 1,810
Experience: ASE Master tech with L1 certification, Toyota Master Diagnostic Technician
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Customer reply replied 1 year ago
Will do
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