P0579 on 2007-2017 Jeep Wrangler (Sport, Sahara, Rubicon, Unlimited) — Cruise Control Multi-Function Input "A" Circuit Range/Performance
1 vehicles · 1 makes · $200-$600 repair
How to diagnose and fix P0579: most-reported vehicles
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Jeep Wrangler · 2007–2017
The clockspring (a coiled ribbon-cable assembly behind the steering wheel that maintains electrical continuity to the driver airbag, horn, cruise control, and steering-wheel radio controls while the wheel turns) is a chronic Wrangler failure point, aggravated by off-road dust intrusion and vibration. Dust contamination of the flexible conductor's grease causes it to bend abnormally and the circuits to wear open — most critically the driver-airbag squib circuit, which may not deploy in a crash. NHTSA recall 16V-288 (Safety Recall S40) covered 2011-2016 RIGHT-hand-drive Wranglers; a companion recall covered earlier RHD units, and NHTSA investigated 2007-2012 left-hand-drive Wranglers. For 2011-2016 LEFT-hand-drive Wranglers, FCA did NOT recall but issued Customer Satisfaction Notification X68 (bulletin D-17-01) extending the clockspring warranty to 15 years/unlimited miles due to the failure rate. The airbag circuit can fail while horn/cruise still work, or vice versa.
Common Symptoms
- Airbag / SRS warning light illuminated
- Horn inoperative
- Cruise control inoperative
- Steering-wheel radio/audio buttons not working
- Radio presets changing randomly
- Intermittent operation that worsens after off-road/dusty use
How to Fix
Scan for airbag (SRS) fault codes and inspect the clockspring for dust intrusion and open circuits. Accepted fix is replacement of the steering-column clockspring assembly (recall/warranty repairs also replace the steering-wheel back cover and column shrouds). On recall- or X68-warranty-eligible VINs the dealer performs this free (and reimburses prior paid repairs); otherwise it is a standard clockspring R&R. Keeping the steering-column boot/seals intact helps prevent recurrence on heavily off-roaded Jeeps.
Sources for this issue (4)
- NHTSA Safety Recall S40 / 16V-288 — Airbag Clockspring (2011-2016 RHD Wrangler)recall
- Clockspring Replacement (X68 Warranty Extension) — 2011-2016 Wranglertsb
- Jeep Wrangler Clockspring / Airbag Problems Investigated — CarComplaints.comarticle
- Clockspring - Warranty Letter: Extended for 15yrs — Jeep Wrangler Forumforum
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P0579 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 P0579 mean?
P0579 stands for "Cruise Control Multi-Function Input "A" Circuit Range/Performance." The cruise control multi-function input 'A' signal is present but out of the expected range or implausible — it does not match valid switch-state values. A range/performance fault.
What are the most common causes of P0579?
The most common causes of P0579 are: Faulty cruise/multi-function switch, Wiring resistance / poor connection, Corroded connector, Faulty clockspring, Faulty PCM input. The specific cause varies by vehicle.
How much does it cost to fix P0579?
Repair costs for P0579 range from $200 to $600, depending on the vehicle and root cause.
Which vehicles are affected by P0579?
Au7o has documented P0579 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.