Solving an Adblue Valtra S353 fault
Deletion in the calculator directly
On this Valtra tractor with an Agco Power engine, we had a defect concerning the Adblue system and more specifically at the level of NOx. The SPN4090 FMI18 fault code relates to a problem with NOx control following an implausible AdBlue level. Consequently, the vehicle is in power restriction. Likely explanations and summary of the situation.
We have a Valtra tractor with an Agco Sisu engine and we have error code SPN4090 FMI18.
This error code indicates that the EEM4 monitoring system has detected an anomaly in the SCR (Selective Catalytic Reduction) system.
The message “Urea quality doesn’t reply to Agco Power recommendation” means that the quality of urea used in the SCR system does not correspond to Agco Power recommendations.
The error code is stored in the engine control system and the warning lamp is activated. The CAN message also indicates that there is an active fault.
The fault is emissions related and engine power will be reduced after a certain time set by the authorities.
After changing the gauge, then the NOx sensors as well as the Adblue liquid, we still have the same fault. Our customer received a proposal to possibly change the Adblue pump and the injector but too expensive.
Our solution for Adblue Valtra S353 fault removal Reprogramming the EEM4 engine ECU consists of modifying the engine program stored in the flash memory of the Tricore processor. This operation corrects the engine software which manages the functions of the engine as well as those of the exhaust gas after-treatment system. By modifying the engine program, it is possible to solve certain engine performance and operation problems, as well as to remove certain error codes, and to override the LIMP mode (performance restriction) and thus solve the Adblue Valtra fault. S353.
Here is a summary of the solution you mentioned to fix the SPN4090 FMI18 error code issue:
Reprogram the EEM4 engine computer (ECU). This operation consists in modifying the engine program stored in the flash memory of the processor. It can be useful in solving certain engine performance and operation problems.
Stop AdBlue injection. Adblue is an additive used in SCR systems to reduce NOx emissions. If AdBlue injection is stopped, the SCR system will no longer work.
The fault codes having been deleted, the vehicle can again be used as originally.
