P0593 on Jeep: How to Diagnose & Fix
Cruise Control Multi-Function Input "B" Circuit High
1 Jeep model · 1 documented issue · 1 critical
P0593 on Jeep by model: symptoms, diagnosis and fix
FCA bulletin 08-005-17 REV. A covers an airbag or traction-control warning light on 2011-2016 JK Wranglers caused by the steering-column clockspring, with driver-airbag circuit, steering-angle-sensor, speed-control switch or steering-wheel control codes stored. A failed clockspring can leave the driver airbag circuit open. It applies to 2011-2016 Jeep Wrangler and Wrangler Unlimited (JK) left-hand-drive models built on or after February 16, 2010 and before May 2, 2016, when one of the bulletin's trouble codes is stored. A 2016 built on or after May 2, 2016 is outside the bulletin. Right-hand-drive JKs were covered instead by safety recalls S40 (NHTSA 16V-288, built through May 2, 2016) and 27B (NHTSA 24V-196, 2016 models built May 3 to September 16, 2016).
Common Symptoms
- Airbag warning light on
- Traction-control warning light on
- Cruise control not working
- Steering-wheel controls not working
How to Fix
If the airbag light is on, have a dealer read the codes; the bulletin applies only when one of its codes is found. The repair replaces the clockspring, the upper and lower steering-column shrouds and the steering-wheel back cover. The bulletin notes a 15-year, unlimited-mile warranty for this repair on included vehicles, counted from the in-service date; the dealer must confirm that your VIN is included. This is not a recall. Do not work on the airbag yourself.
Sources for this issue (3)
P0593 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 P0593 mean on a Jeep?
P0593 stands for "Cruise Control Multi-Function Input "B" Circuit High." The PCM detects voltage on the cruise control multi-function input 'B' circuit that is higher than expected (short to voltage or open). The input signal is invalid. On Jeep it is documented across 1 model: Wrangler.
What are the most common causes of P0593?
The most common causes of P0593 are: Short to voltage in switch wiring, Open circuit in the input circuit, Faulty cruise/multi-function switch, Corroded/loose connector. The specific cause varies by vehicle.
How much does it cost to fix P0593 on a Jeep?
Repair costs vary widely with the root cause and Jeep model; each issue on this page carries its own estimate where one is published.
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Content compiled with AI assistance using NHTSA complaints, TSBs, and owner reports. May contain errors. Always verify with your vehicle's service manual.