P1790 Chevrolet Code - Transmission Control Module Checksum
Quick Answer
P1790 Chevrolet indicates Transmission Control Module Checksum. Common causes include Faulty Transmission Control Module, Transmission Control Module harness is open or shorted, Transmission Control Module circuit poor electrical connection. Severity is High - diagnose this code as soon as possible. Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
- What it means
- P1790 Chevrolet indicates Transmission Control Module Checksum.
- Common causes
- Common causes include Faulty Transmission Control Module, Transmission Control Module harness is open or shorted, Transmission Control Module circuit poor electrical connection.
- Severity
- High - diagnose this code as soon as possible.
- Can I drive?
- Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
Code P1790 Chevrolet Description
What are the Possible Causes of the DTC P1790 Chevrolet?
- Faulty Transmission Control Module
- Transmission Control Module harness is open or shorted
- Transmission Control Module circuit poor electrical connection
How to Fix the DTC P1790 Chevrolet?
Review the 'Possible Causes' above and visually examine the corresponding wiring harness and connectors. Check for damaged components and inspect connector pins for signs of being broken, bent, pushed out, or corroded.
What is the Cost to Diagnose the Code?
Labor: 1.0
To diagnose the P1790 Chevrolet code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.
Need more information about the P1790 Chevrolet code?
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Need Help with the Code?
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Frequently Asked Questions about P1790 Chevrolet Code
No Frequently Asked Questions about P1790 Chevrolet Code found.
Discuss the causes and fixes for P1790 Chevrolet OBDII Code
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so you want info? Okay , 2016 chevy spark replaced the transmission with a known good used one. P1790 is the nsame code that I had before the R/R. My Snapon scaner dose not have the program to re learn the TCM. So, took it to the dealer, dealer said they did the relearn but the car will not go in reverse . Had it towed back to the shop and drove it off the truck and into the shop, in reverse. Still have a P1790 code. Sooo, the question is, if the dealer up dated the soft ware as per the TSB why do I still have that code???
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I haven't had that problem before, but according to a national database of repairs for your model year, if the code persists after reprogramming the TCM, then the next step is replace the TCM. Unfortunately, other than that I no more information.
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