B1A35 on 2022-2025 Jeep Grand Cherokee (Limited, Overland, Summit, Summit Reserve) — Security/Key Transponder Communication Error (manufacturer-specific)
1 vehicles · 1 makes · $200-$1,400 repair
Most Reported On
B1A35 is an OBD-II diagnostic trouble code meaning “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. This code is most commonly reported on 2022-2025 Jeep Grand Cherokee (Limited, Overland, Summit, Summit Reserve), with repair costs ranging from $200 to $1,400.
Common Causes
Typical Repair Cost
Based on 1 documented vehicle-specific issues. Actual cost depends on root cause and vehicle.
Diagnostic Tools
To diagnose B1A35, you'll need an OBD-II scanner. Here are our recommendations at every price point.
ANCEL AD310 Classic OBD-II Scanner
by ANCEL
A simple, affordable code reader that reads and clears check engine codes. Great for quick diagnostics on any OBD-II vehicle (1996+).
- Read & clear engine codes
- View freeze frame data
- I/M readiness status
- No batteries or app needed
BlueDriver Pro Bluetooth Scanner
by BlueDriver
Bluetooth OBD-II scanner with a free companion app. Provides enhanced diagnostics, smog readiness, and repair reports sourced from a database of verified fixes.
- Enhanced diagnostics (ABS, SRS, transmission)
- Repair Reports with verified fixes
- Smog check readiness
- Free app (iOS & Android)
LAUNCH CRP123X OBD-II Scanner
by LAUNCH
A professional-grade handheld scanner that reads all four major systems (engine, transmission, ABS, SRS) with live data streaming and graphing.
- Engine, transmission, ABS, SRS diagnostics
- Live data stream & graphing
- AutoVIN for vehicle identification
- Free lifetime updates via Wi-Fi
Autel MaxiCOM MK808S Diagnostic Tool
by Autel
Shop-level diagnostic tablet with bi-directional control, active tests, and full system coverage. Ideal for serious DIYers and small shops.
- All-system diagnostics (25+ modules)
- Bi-directional control & active tests
- Oil reset, EPB, BMS, TPMS, injector coding
- 7-inch touchscreen with Android OS
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FAQ
What does B1A35 mean?
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.
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?
Repair costs for B1A35 range from $200 to $1,400, depending on the vehicle and root cause.
Which vehicles are affected by B1A35?
Au7o has documented B1A35 across 1 vehicle models from 1 manufacturers: Jeep.
Content compiled with AI assistance using NHTSA complaints, TSBs, and owner reports. May contain errors. Always verify with your vehicle's service manual.