P1790 – Infiniti DTC

Infiniti DTC P1790 – Trans ROM Checksum Error

DTC P1790 meaning on Infiniti

Diagnostic Trouble Code (DTC) P1790 on an Infiniti indicates a Trans ROM Checksum Error. This error occurs when the Engine Control Module (ECM) detects that the calculated checksum of the transmission control module’s read-only memory (ROM) does not match the expected value.

Infiniti DTC P1790 symptoms

Symptoms of DTC P1790 on an Infiniti may include:

• Check Engine Light (CEL) illuminated
• Transmission shifting issues
• Reduced fuel efficiency

Infiniti DTC P1790 causes

Common causes of DTC P1790 on an Infiniti include:

• Corrupted or faulty transmission control module software
• Electrical issues in the transmission control module circuit
• Interference from aftermarket modifications

Infiniti DTC P1790 seriousness

DTC P1790 should be addressed promptly as it can lead to transmission performance issues and potential drivability concerns. Ignoring this error code may result in further damage to the transmission system.

How to diagnose DTC P1790 on Infiniti

To diagnose DTC P1790 on an Infiniti, a mechanic may perform the following steps:

1. Use a diagnostic scanner to retrieve the trouble codes
2. Inspect the transmission control module for any visible damage
3. Check the transmission control module connections for corrosion or loose connections
4. Perform a software update or reflash on the transmission control module

How to fix DTC P1790 on Infiniti

To fix DTC P1790 on an Infiniti, the following steps may be taken:

1. Address any underlying electrical issues in the transmission control module circuit
2. Reprogram or replace the transmission control module if necessary
3. Clear the trouble codes and perform a test drive to ensure the issue is resolved

How to erase DTC P1790 on Infiniti

To erase DTC P1790 on an Infiniti, follow these steps:

1. Use a diagnostic scanner to clear the trouble codes
2. If the issue has been fixed, the Check Engine Light should turn off
3. Perform a test drive to confirm that the error code does not return

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