The P0752 code in your 2022 Jeep Grand Cherokee indicates shift solenoid A is stuck in the engaged (on) position within the ZF 8HP transmission. This condition prevents normal gear selection as hydraulic fluid is continuously directed to the wrong clutch packs.
ZF 8HP Transmission Solenoid System
The Grand Cherokee's ZF 8-speed automatic uses five shift solenoids (labeled A through E) to control gear selection. These solenoids direct hydraulic pressure to clutch packs and bands in precise combinations. When solenoid A is stuck on, the transmission cannot properly sequence through all gears.
What Causes Solenoid A to Stick On
- Internal solenoid mechanical failure
- Contamination preventing solenoid return
- Electrical short holding solenoid energized
- Valve body wear allowing fluid bypass
- TCM continuously commanding solenoid active
- Debris lodged in solenoid valve
Symptoms of P0752
- Limited gear availability
- Stuck in a particular gear
- Extremely harsh shifts
- No reverse or forward gear
- Check engine light on
- Transmission limp mode
Grand Cherokee ZF 8HP Reliability
The ZF 8HP is one of the most acclaimed automatic transmissions available. While generally very reliable, solenoid issues can occur. The 2022 Grand Cherokee's transmission benefits from the latest ZF design improvements.