Powertrain, generic · Hybrid propulsion

P0B0C Electric/Auxiliary Transmission Fluid Pump A Hydraulic Leakage

Check engine lightOn
EmissionsNot relevant
Drive cycleNot required
Limp modePossible

P0B0C says the circuit fed by auxiliary pump A loses pressure through a leak, so the pump cannot hold the demanded pressure. Stellantis documents it as P0B0C 7A for the 2023-26 Jeep Avenger and 2026 Compass with hybrid dual-clutch transmission outside the US (TSB 21-061-26): an internal leak at the parking pawl locking piston causes jerking and power loss and may stop the engine from restarting after a stop; with P07E4 or P07E6 present and more than 5 km on the clock, the piston or the transmission is replaced. How a controller can see a leak shows a Nidec patent: after a speed change the pump current keeps falling instead of recovering, and the pump is stopped. P0B0B and P0B09 cover the supply, P2797 a pump that does not deliver.

Likely causes

Internal leak at the parking pawl locking piston (Jeep Avenger/Compass hybrid DCT)
Worn seal or valve leaking inside the hydraulic circuit
External leak and low transmission fluid level
Internal wear of the auxiliary pump

Symptoms

  • Jerking and loss of power while driving
  • Engine fails to restart after a stop
  • Transmission warning, possibly with P07E4 or P07E6

Repair estimate

DifficultyShop_onlyWorkshop job
Parts and labour€300–6,000
Time2–8 h

Typical range across vehicles; the real cost depends on what the testing finds.

Parts involved

aux trans pump atransmission fluid

Related codes

P0B09P0B0BP2797P07E4P07E6

References: static.nhtsa.gov, patents.google.com, patents.google.com.