P0579 on Jeep
Cruise Control Multi-Function Input "A" Circuit Range/Performance
P0579 on Jeep vehicles indicates cruise control multi-function input "a" circuit range/performance. Au7o has documented this code across 1 Jeep model — most commonly on Wrangler. 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. Typical repair costs on Jeep range from $200 to $600, depending on the specific model and root cause.
Common Causes of P0579
- •Faulty cruise/multi-function switch
- •Wiring resistance / poor connection
- •Corroded connector
- •Faulty clockspring
- •Faulty PCM input
P0579 on Jeep by Model
Jeep Wrangler(1 issue)
- Steering Column Clockspring Failure — Airbag Warning Light, Dead Horn / Cruise / Wheel Controls2007-2017
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.
Looking for P0579 on a different make?
View P0579 across all makes →Frequently Asked Questions
What does P0579 mean on Jeep?▼
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. On Jeep specifically, this code is documented across 1 model.
What causes P0579 on Jeep vehicles?▼
Common causes on Jeep: Faulty cruise/multi-function switch, Wiring resistance / poor connection, Corroded connector, Faulty clockspring, Faulty PCM input. Specific causes vary by model and year — see the per-model sections below.
How much does it cost to fix P0579 on a Jeep?▼
Repair costs on Jeep range from $200 to $600, depending on the specific model and root cause.
Which Jeep models have P0579 documented?▼
Au7o has documented P0579 on 1 Jeep model: Wrangler.