VOLVO D13 - I-shift transmission air leak

I wrote about it here...

I-shift issue

 

usually the control housing pistons on in JERRY's case sounds like actuator is leaking.

 

Hello Nasriza. I have the same issue - P105421 Tank Air Pressure Sensor (SEPrSA) Signal amplitude less than minimum. Code and when the truck stops at the light it suddenly shakes up, rattles the entire truck and transmission is no longer shifts. It takes some time to build up the air again to move the truck again.
What is the cause of it? Sudden lost of all air on all airbags as well with loud hiss sound.

Also, can you share your contact information? The truck is in Chicagoland.


Thank you,
Bunyod

 

well sounds like you have an air leak somewhere so that has to be addressed first. Whatever it is it has to be repaired.
Search on Google Truck Brothers west Chicago
Truck Brothers Inc - Google Search

 

Got air leak fixed and had driven 300 miles and the issue came back again... Very dangerous in the middle of road at the light.
Happens when I push the breaks and when start pushing the acceleration, transmission doesn't shift.
Sometimes sudden air release and trans won't shift. ...
Running out ideas...
Got this code this time:

SA 24 DTC P107538

DTC Descriptions • P107538 (MID 130 PSID 27 FMI 8) - This fault code indicates that the clutch control is compromised, and the TECU SW is taking mitigating actions to manage the issue which could reduce comfort during take-off. The TECU is commanding the clutch to move using the CVU and the clutch is moving slower than expected to the demanded position. The control command to the CVU exceeds a set PWM and the fault will log. This is normally found during ‘Idle Drive ‘events when the vehicle is being pulled along on the idle governor in gear 1-6 or reverse. This can also happen during shifting events when the clutch is commanded to disengage for an up or down shift and the clutch position does not meet the demand within a set amount of time. Singular events of this DTC may be triggered due to low air pressure, low ambient temperature or intermittent dynamic conditions in the pneumatic system. In these situations, the DTC will become inactive when the driver selects N during standstill and the TECU SW will then revert back to normal operation

 

Call me tomorrow morning u have to take a picture of where this is coming from there is nothing else I can think of that would do this

 

Aloha, We have the same "check transmission at next stop" issue as well, on our i-shift 2010 VNL. We have NO air in the Aux-Transmission air tank so I can only assume that the check valve (or input line from the feeder tank) is clogged --- correct? Thanks for any help you can give me.

 

This is the check valve is usually bad u can remove it all together for time being if you need to get out of a jam should not effect performance of trans

 

More questions. Is the transmission air tank (under the battery) a split tank as it there are 2 drains. One on either end.
Truck is moving BUT still dies out (lost petal and have to pull over, shut off and restart) when going up a small hill and truck is changing gears. Thanks again for your help.

 

So it's not normal then for that to come on the dash when the air in the tanks is low? Mine shows this message anytime the truck sits and air psi gets below 60 in tanks, but goes away when it rises above 60psi.