Jeep-specific code — factory diagnostic data| DTC Data Sheet | |
| Code | B1A24 |
| Vehicle | 2011 Jeep Grand Cherokee WK2 |
| Module | NODE, WIRELESS IGNITION (WIN) |
| Fault type | Circuit |
| Official meaning | Key Not Programmed |
Definition source: Jeep factory description. Diagnostic guidance is based on factory-defined fault logic for this code.
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B1A24 Quick Answer
B1A24 on a 2011 Jeep Grand Cherokee: Key Not Programmed. Begin with a freeze-frame check and inspect the connector at the named device — WK2 harnesses are prone to flex-zone wear at door pillars and seat rails.
What Does B1A24 Mean on a Jeep Grand Cherokee?
The 2011 Jeep Grand Cherokee (WK2) uses the NODE, WIRELESS IGNITION (WIN) to monitor and diagnose this circuit. B1A24 is set when the module detects key not programmed. The official meaning per the 2011 WK2 service information is exactly: KEY NOT PROGRAMMED. The same code definition applies to the related Dodge Durango (WD platform sister) when fitted with the same module.
Symptoms
- Check engine light or system warning indicator on the cluster
- Reduced functionality of the affected node, wireless ignition (win) system
- Possible co-codes from connected modules on the WK2 CAN bus
- For SRS / restraint codes: airbag warning light, possibly with passenger-airbag-OFF indicator
Common Causes
- Fault in the named component, sensor, or actuator circuit
- Open or shorted wiring in the affected circuit
- Connector corrosion, water ingress, or backed-out terminal — particularly common at door-flex zones on the WK2
- Loss of supply voltage or ground at the affected device
- TIPM-related power supply issues (the WK2 TIPM is a documented wear part with known relay-failure issues that can cascade into many module-supply codes)
- Module internal fault — verify wiring and supplies first
Diagnostic Approach
For B1A24 on the 2011 Jeep Grand Cherokee you’ll need a scan tool that supports the Wireless Ignition Node (WIN) module — a Stellantis-specific component handling key/start authority — plus a programming-capable tool for module replacement.
- Verify the code is current rather than just stored history.
- Read freeze-frame and any related codes — co-codes from related modules often pinpoint the failing system.
- Inspect the connector at the device named in the code description. WK2-platform harnesses suffer from terminal-tension loss in door-pillar and seat-rail flex zones — wiggle-test the connector while monitoring live data.
- Measure supply voltage and ground integrity at the affected device with the engine running. On the WK2, supply integrity issues frequently trace back to the TIPM master power module.
- If supplies and the connector are sound, isolate the device with a known-good substitute or by load-resistor substitution at the harness.
- Clear the code, drive the vehicle through one or two cycles to confirm the fault does not return.
Possible Fixes
- Replace the failed device or sensor identified during diagnosis
- Repair open or shorted wiring
- Connector pin-tension or pigtail repair
- TIPM repair or replacement when the underlying issue is supply-side (a common WK2 root cause)
- Module replacement and programming if the named module itself is faulty
Can I Still Drive With B1A24?
Drivability impact depends on the affected subsystem. NODE, WIRELESS IGNITION (WIN) faults that touch a primary safety system (brakes, restraints, steering, air suspension) should be repaired before further driving. Comfort or convenience faults can usually be deferred briefly, but the WK2’s tightly-coupled CAN architecture means single-module faults can mask others — address sooner rather than later.
FAQ
Will B1A24 clear itself on a Jeep Grand Cherokee?
If the underlying fault was a momentary glitch — for example a brief connector dropout or a one-time low-voltage event — the B1A24 may clear after a few drive cycles. Persistent root causes (failed device, broken wire, corroded terminal) will keep the fault active until the affected component is repaired on the Jeep Grand Cherokee.
Can I drive my Jeep Grand Cherokee with B1A24 active?
It depends which subsystem is affected. If the B1A24 is in a primary safety system (brakes, restraints, steering, air suspension), the Jeep Grand Cherokee should be driven only to a workshop. Comfort, lighting, and audio faults are lower priority but still worth addressing — the Jeep Grand Cherokee’s CAN architecture means a single unresolved code can mask others.
How much does it cost to fix B1A24 on a Jeep Grand Cherokee?
Repair cost depends on the named device. On the Jeep Grand Cherokee, simple connector or wiring repairs typically run $80-200 in shop labour. Sensor replacements run $120-450 including parts and diagnostic time. Module replacement (when the affected control module itself has failed) is the most expensive path at $400-1,200 depending on whether the new module needs programming. Get a written estimate that breaks out diagnosis time, parts, and any required PMI / programming charge.
What does the official Jeep Grand Cherokee service definition say about B1A24?
Per the factory service information, B1A24 is defined as: Key Not Programmed. The diagnostic procedure is in the Jeep Grand Cherokee service-manual chapter for the affected module.