What does code P1790 mean on Isuzu vehicles?
The ECU detects a checksum error in the transmission ROM, indicating corrupted software.
OBD-II Code Isuzu
P1790 — Isuzu — Transmission ROM Checksum Error
The ECU detects a checksum error in the transmission ROM, indicating corrupted software.
Common symptoms
- Fail-safe mode
- limited operation
Possible causes
- Corrupted TCM ROM
- software error
Initial recommendation
Reprogram or replace the transmission control module.
Safety notice
This information is for guidance only. Brand-specific codes may vary by model, year, engine, transmission and vehicle configuration. It does not replace a physical inspection or diagnosis by a qualified mechanic. If the vehicle is unsafe to operate, avoid driving it and seek professional inspection.
Analyze this code with MecaOBD
Use the app to combine Isuzu code P1790 with your vehicle's actual symptoms for more complete diagnostic guidance.
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