B1A35 on Jeep: How to Diagnose & Fix
Security/Key Transponder Communication Error (manufacturer-specific)
1 Jeep model · 1 documented issue · $200-$1,400 repair
B1A35 on Jeep by model: symptoms, diagnosis and fix
Owners have reported the hands-free/power liftgate on the WL Grand Cherokee opening unexpectedly, reversing while closing, beeping without completing the cycle, or failing to latch. Reports point to latch alignment issues, pinch-sensor calibration problems, weak struts, or software/body control faults. While not usually catastrophic, it is a recurring nuisance and can create injury risk or battery drain if the gate remains ajar.
Common Symptoms
- liftgate beeps but does not close
- liftgate reverses while closing
- rear hatch says open when shut
- hands-free liftgate works intermittently
- battery drain from hatch not fully latched
How to Fix
Check for stored body/liftgate module faults, verify latch alignment and striker position, inspect pinch sensors and wiring in the hinge area, and test strut force. Dealers often address this with software updates, latch adjustment, sensor replacement, or liftgate module relearn procedures. If the gate bounces back or will not latch, avoid forcing it repeatedly because that can damage the cinch motor.
What you need to fix it
Only diagnosis- and fitment-reviewed repair parts are linked here.
- Genuine Mopar 68364385AE power-liftgate latchOEMMopar 68364385AE
Power-liftgate latch/cinch replacement after switch and mechanical testing confirms failure Fitment/availability: The exact catalog identifies 68364385AE as the with-power-liftgate latch for specified 2022 applications. Confirm VIN and W…
- Genuine Mopar 68342104AA driver-side power-liftgate support strutOEMMopar 68342104AA
Driver-side support replacement after measured weakness, leakage or binding is confirmed Fitment/availability: 2022-2025 Grand Cherokee with power liftgate, driver side. Confirm VIN and installed power-liftgate hardware; it is not the pa…
- Genuine Mopar 68371475AC passenger-side power-liftgate support strutOEMMopar 68371475AC
Passenger-side support replacement after measured weakness, leakage or binding is confirmed Fitment/availability: 2022-2025 Grand Cherokee with power liftgate, passenger side. Confirm VIN and installed hardware; it is not the driver supp…
As an Amazon Associate, we earn from qualifying purchases; other part links may also earn au7o a commission. Confirm fitment by VIN before buying.
Owner tips & cautions
- TipClean the latch and striker area and verify no cargo mat or weatherstrip interference before assuming a module failure.
- TipOwners recommend performing the power liftgate height/memory relearn after battery replacement or low-voltage events.
Sources for this issue (1)
B1A35 code reference
General diagnostic-code context. The code alone does not confirm a cause for your vehicle; use the applicable issue card and its sources.
Frequently asked questions
What does B1A35 mean on a Jeep?
B1A35 stands for "Security/Key Transponder Communication Error (manufacturer-specific)." B1A35 is a manufacturer-specific body/security-system code. On Chrysler/Dodge/Jeep/RAM it is commonly defined as an unidentified-key or key communication error, and on Mitsubishi as a transponder read error. In all cases it relates to the immobilizer being unable to properly read or verify the key transponder, which can cause a no-start or security-light condition. Because definitions differ by brand, confirm against the specific make before repair. On Jeep it is documented across 1 model: Grand Cherokee.
What are the most common causes of B1A35?
The most common causes of B1A35 are: Unprogrammed, damaged, or unrecognized key transponder, Faulty immobilizer antenna ring at the ignition, Interference from other transponders or metal on the key ring, Wiring or connector fault between antenna and module, Weak vehicle or key battery, Faulty immobilizer or body control module. The specific cause varies by vehicle.
How much does it cost to fix B1A35 on a Jeep?
Published repair estimates on Jeep range from $200 to $1,400 depending on the model and root cause. If an issue mentions a recall or campaign, check your VIN with the manufacturer or NHTSA and confirm eligibility and coverage with a dealer.
Looking for B1A35 on a different make?
View B1A35 across all makes →Content compiled with AI assistance using NHTSA complaints, TSBs, and owner reports. May contain errors. Always verify with your vehicle's service manual.