B1A35 on Jeep
Security/Key Transponder Communication Error (manufacturer-specific)
B1A35 on Jeep vehicles indicates security/key transponder communication error (manufacturer-specific). Au7o has documented this code across 1 Jeep model — most commonly on Grand Cherokee. 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. Typical repair costs on Jeep range from $200 to $1,400, depending on the specific model and root cause.
Common Causes of B1A35
- •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
B1A35 on Jeep by Model
Jeep Grand Cherokee(1 issue)
- Power Liftgate Opens or Closes Erratically / Fails to Latch2022-2025
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.
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View B1A35 across all makes →Frequently Asked Questions
What does B1A35 mean on 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 specifically, this code is documented across 1 model.
What causes B1A35 on Jeep vehicles?▼
Common causes on Jeep: 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. Specific causes vary by model and year — see the per-model sections below.
How much does it cost to fix B1A35 on a Jeep?▼
Repair costs on Jeep range from $200 to $1,400, depending on the specific model and root cause.
Which Jeep models have B1A35 documented?▼
Au7o has documented B1A35 on 1 Jeep model: Grand Cherokee.