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Aftertreatment systems, Cummins, Fault Codes

Cummins X15 Fault codes 3714 and 3712

Have you been working on a Cummins ISX15 or QSX15 with fault codes 3714 and 3712 and you want to know how to fix and clear them? Read my guide and get this engine on the road again!

Fault Code: 3712: Aftertreatment SCR Operator Inducement – Data Valid But Above Normal Operating Range – Most Severe Level

SPN: 5246 FMI: 0/0

Fault Code: 3714: Engine Protection Torque Derate – Condition Exists

SPN: 1569 / FMI: 11/31

 

Cummins Fault codes 3712 and 3714. If these fault codes are active, this means the engine performance is already reduced (power derate) and possibly the vehicle speed is also limited.

Both are information-only fault codes which appear when the ECM detects active critical fault codes related to engine operation.

To clear the two fault codes 3712 and 3714, you must address the other fault codes first! Once you clear them and the ECM verifies they have been cleared, this fault code will change to inactive. You might need a key cycle for this to happen.

An alternative solution which I DO NOT recommend, is to clear the fault codes with a diagnostic tool, or even recalibrate the ECM with the same calibration. However, if you do not address the main fault codes, the derate and faults 3712 and 3714 will come back

 

Cummins fault codes related to 3712:

Aftertreatment diesel exhaust fluid system: 1682, 1683, 1685, 1713, 2976, 3238, 3241, 3258, 3261, 3423, 3425, 3563, 3572, 3574, 3575, 3596, 4156, 4169, 4769
Aftertreatment diesel exhaust fluid dosing unit: 3558, 3559
Aftertreatment diesel exhaust fluid dosing valve:3567, 3568
Aftertreatment NOx: 3232, 3682, 3748
Aftertreatment SCR: 3151

 

Cummins fault codes related to 3714:

Aftertreatment SCR: 3151, 3582
Aftertreatment diesel exhaust fluid dosing unit: 1682, 3558, 3559
Aftertreatment diesel exhaust fluid dosing valve: 3567, 3568
Aftertreatment diesel exhaust fluid system: 4156, 4169
Aftertreatment diesel exhaust fluid temperature: 1683, 1713, 3238, 3241, 3258, 3261, 3423, 3425, 3563, 4769
Aftertreatment diesel exhaust fluid pressure: 3572, 3574, 3575, 3596

 

Looking for diagnostic tools? Check my suggestions!

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Post author
George Sarimpalidis

George Sarimpalidis

I've got a long experience as technical trainer and training course developer. My specialization is diesel engines and electronic management systems. I love learning about how everything works and then explaining complex systems in a way that everybody understands. The more complex, the better!

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