Solving an Adblue fault Valtra S353
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On this Valtra tractor with an Agco Power engine, we had a fault with the Adblue system, and more specifically with NOx. Fault code SPN4090 FMI18 indicates a problem with the NOx control system, due to an implausible adblue level. As a result, the vehicle is under power restriction. Probable explanations and summary of the situation.
- We have a Valtra tractor equipped with an Agco Sisu engine and we have an 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 the urea used in the SCR system does not correspond to Agco Power's recommendations.
- The fault code is stored in the engine control system and the warning lamp is activated. The CAN message also indicates that a fault is active.
- The fault is related to emissions, and engine power will be reduced after a certain time set by the authorities.
After changing the gauge, then the NOx sensors and the Adblue fluid, we still have the same fault. Our customer was offered the possibility of changing the Adblue pump and injector, but this was too expensive.
Our solution for Valtra S353 Adblue fault removal
Reprogramming the EEM4 engine ECU involves modifying the engine program stored in the Tricore processor's flash memory. This operation corrects the engine software that manages engine functions and those of the exhaust aftertreatment system.
By modifying the engine program, it is possible to solve certain engine performance and operating problems, as well as removing certain error codes, overriding the LIMP mode (performance restriction) and thus resolving the Adblue Valtra S353 fault.
Here's a summary of the solution you mentioned to solve the SPN4090 FMI18 error code problem:
- Reprogram the engine's EEM4 ECU. This operation involves modifying the engine program stored in the processor's flash memory. It can be useful for solving certain motor performance and operating 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 function.
- Now that the fault codes have been removed, the vehicle can be used as originally intended.
Our services
We frequently intervene on Agco Power engines. You can find the list of our interventions on this pageas well as more technical specifications on programming EEM4 gearboxes on our dedicated page.
