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Discussion Starter · #1 ·
3033R showing STOP, so it's running at reduced power. The code says 1209.04 - Exhaust Manifold Pressure Switch out of range - Low.
The Mode 1 ECU 047 displays 90.
I don't know where the pressure switch is located.
I don't know what to repair or replace.
Can anyone help? Thanks!
 

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I think I remember seeing that error back last winter in cold weather.
In fact, I saw a few errors during that time.
Interestingly, the tractor would also barely start due to a weak battery.
Once it did start, after a few minutes of warm up, I could shut down, restart, with no errors.

I replaced the battery and thus far have seen no more error messages at all.
YMMV
 

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You likely have a failed intake/exhaust pressure sensor, basically the EGR pressure sensor. Part number MIU803774. It mounted on top of the valve cover.

Can't guarantee the sensor is the cause because I've seen engine harness issues and the errant ECU cause this same DTC.

ETA: pull the sensor and check the condition of the o-rings and the exhaust-side port for blockage.
 
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