Fight adblue problems on John Deere engines
The Phoenix Power Tech Plus 6068HTJ28 (6.8L) engine that powers John Deere 1170G harvesters meets Tier 4F emissions standards and is equipped with a NOx (nitrogen oxides) emissions reduction system known as AdBlue name. Tier 4F emissions standards require a significant reduction in emissions of NOx and other pollutants compared to earlier standards, such as the Tier 2 standard. The AdBlue system is a key part of this reduction in emissions, using an additive chemical to reduce NOx emissions in engine exhaust. It is not legally possible to remove the adblue on John Deere permanently, however the operation being invisible, it is everyone’s responsibility.
However, this one is also likely to be forced into numerous breakdowns. It is possible that the AdBlue system of John Deere 1170G harvesters may be subject to performance issues or occasional failures. Faulty or failed NOx sensors can be a common cause of these problems, as can AdBlue pump faults. If the AdBlue system is not working correctly, this can lead to degraded engine operation and an increase in polluting emissions, as well as a switch to “LIMP MODE”, which is an emergency operating mode used to protect the engine in performance issue.
SPN codes and degraded mode
Suspect Parameter Number (SPN) codes are fault codes used by vehicle diagnostic systems to identify specific problems. They are typically used as part of the SAE J1939 diagnostic communication standard, which is used in heavy vehicles and heavy equipment.
Each SPN code is associated with a specific vehicle parameter or component, such as the engine, transmission, brake system, etc. When a problem is detected in one of these components, the diagnostic system sends an SPN code corresponding to the detected problem.
When a severity 2 or 3 SPN code is detected on the CANBus network of your John Deere harvester, then the vehicle goes into safety with a considerable reduction in power and performance that no longer allows you to work in ideal conditions and sometimes even forces you to leave the vehicle in the middle of the forest because it is impossible to get out.
Remove adblue on John Deere
Definitively removing AdBlue from your JD 1170G harvester is therefore possible by reprogramming the emission control system. To do this we need to connect to the vehicle via the manufacturer’s diagnostic socket and retrieve the data from the L33 computer in order to rework and reimplement them with new parameters. Fault removal is carefully done as well as performance reduction modes (emissions only).
