99 jaguar transmission code p1722

Yes most likely a vehicle goes into limp mode up failure of MAFS unplug the sensor and see if you have any better performance getting it to the shop

When the limp home is engaged by the processor a fault code or codes is set in memory, it may be a Transmission code or engine fault code. You nee it tested with a full function scanner, a code reader will not read the transmission faults.

2005 Jaguar XJ-Series
Tim, Will have to have it scanned to retrieve trouble codes, to be able to diagnose why it is going into limp.

what have you done to repair the fault that shows the codes?
from your statement you are removing the codes and resetting the ECM but the codes come back and the vehicle goes back into limp mode
one of the codes (p 0734 --0?) refers to gear 4--incorrect ratio===causes --wiring---TR sensor /switch ---shift solenoids---transmission mechanical fault
If that fault area is not fixed then the TCM doesn't know what gear to select so it goes to limp mode

Sounds like you have lost overdrive. Most cars go into to limp mode with engine and transmission problems. Limp mode is reduced engine power and the transmission only shifts to certain gears. Keeps people from totally destroying the drive train.

run fault code and check for TCM problem. The limp mode is also for engine faults.

MOST TIME LIMP MODE MEAN ECM FAILING IF YOU CANT ERASE OLD CODE AND REPROGRAM ECM. AND IT CANT RELEARN NEW PART ECM HAS A MEMORY FAULT.

The P1722 Possible Cause is:
- Transmission oil level low
- Selector cable adjustment / installation incorrect
- Output speed sensor problem (Refer to P0721 Possible Causes)
- Transmission mechanical failure
Hope this helps.

Internal drum broken , remove trans and fix , can buy drum on eBay

Check your Throttle