JLG Articulating Boom Lift 10 Fault Code: Charge Air Temperature
Also called Running at Cutback - Out of Transport Position, Running at Cutback-Out of Transport Position
Charge Air Temperature · ai-assisted, editor-reviewed · Last updated 2026-07-13
TL;DR
Fault code 10 on JLG articulating boom lifts corresponds to SPN 105 / FMI 2 and covers two different diagnostic bodies: a charge air temperature sensor fault, and a cutback condition triggered when the tower or boom elevation switches show the machine is out of transport position. When active, drive speed is limited to elevated max and the boom must be lowered into transport position to clear the cutback condition.
Medium severity. This code does not typically stop the machine outright, but it limits drive speed and signals either a sensor problem or an out-of-position condition. It should be checked before continuing normal operation, especially before transport or travel on uneven ground.
What does JLG Articulating Boom Lift error code 10 mean?
Fault code 10 appears in JLG documentation with more than one description tied to the same SPN 105 / FMI 2 code: Charge Air Temperature, and Running at Cutback, Out of Transport Position. These are related through the same diagnostic trouble code number but represent different underlying conditions depending on which system logic is reporting.
The cutback condition is set when the tower elevation switch shows the tower elevated out of transport position, or when boom elevation switch #1 or boom elevation switch #2 shows the boom elevated out of transport position. Any one of these three switch states is enough for the control system to consider the machine out of transport position.
When the machine is out of transport position, drive speed is limited to elevated max, meaning the machine slows its allowed travel speed as a safety measure. On the sensor fault side, a fault at the corresponding sensor entry, such as a short circuit or cable break, deactivates the associated monitoring function for that sensor.
Common causes of 10
- Tower elevation switch reporting the tower is elevated out of transport position.
- Boom elevation switch #1 reporting the boom is elevated out of transport position.
- Boom elevation switch #2 reporting the boom is elevated out of transport position.
- A fault at the corresponding sensor entry, such as a short circuit or a broken cable, which deactivates the associated monitoring function.
How to troubleshoot JLG Articulating Boom Lift 10: first checks
- Confirm the boom and tower position visually and compare against what the elevation switches are reporting.
- Lower the boom into transport position and see if the cutback condition and speed limitation clear.
- Check the sensor cable for damage, chafing, or loose connections at the elevation switches.
- Check the sensor itself for proper operation and replace it if it fails to respond correctly.
- Check fault limits for the sensor to confirm they are set correctly for the application.
How the code clears
To clear the cutback condition, lower the boom into transport position. This is the corrective action listed for this fault. For the sensor fault side, no separate clearing step is listed beyond checking the sensor cable, checking and replacing the sensor if required, and checking the sensor's fault limits.
Frequently asked questions
What does JLG fault code 10 mean?
It is tied to SPN 105 / FMI 2 and can indicate either a charge air temperature sensor issue or a cutback condition where the machine's elevation switches show the boom or tower is out of transport position.
Why is my JLG boom lift driving slower than normal?
If the machine is out of transport position, as reported by the tower elevation switch or either boom elevation switch, drive speed is automatically limited to elevated max as a safety measure.
How do I clear the out of transport position fault?
Lower the boom into transport position. This is the listed corrective action for clearing this condition.
Which switches can trigger this fault?
Three switches can set the out of transport condition: the tower elevation switch, boom elevation switch #1, and boom elevation switch #2. Any one of them reporting elevated position out of transport is enough.
What happens if the sensor itself fails?
If there is a fault at the sensor, such as a short circuit or broken cable, the associated monitoring function tied to that sensor is deactivated.
What should I check first if I get this code?
Check the actual boom and tower position against what the switches report, inspect the sensor cable for damage, and check whether the sensor needs replacement.
Is it safe to keep operating with this fault active?
The machine will run at reduced, elevated max speed while out of transport position, but the underlying sensor or switch issue should be diagnosed and corrected rather than ignored.