1257 SPN Fault Code

Name:

Transmission Gear Ratio 2

Description:

Gear ratio value stored in the ECU that is used to define a range of transmission gears for which a limit is applied to the engine output torque. Transmission gear ratio 2 should be the numerically highest transmission gear ratio breakpoint less than transmission gear ratio 1 (see SPN 1255) that defines ratio ranges for torque limits.

1257 spn fault code name is Transmission Gear Ratio 2. If you don't take the time to look into 1257 spn fault when it arises, it can add up quickly. One small issue like 1257 can cause a larger component to become damaged without taking the time to investigate. If you suspect your truck is suffering from one of these issues, look into replacing those small components to save money down the road.

Note: The name and description of 1257 code represents text descriptions for faults supported by another coding system and does not necessarily comply with SAE J1939. For a specific engine manufacturer's explanation for codes, please consult the engine's technical manual. See also other spn codes.

1257 SPN Fault Code

Name:

Description:

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