C1727 on Lincoln
EPS Motor Circuit Malfunction
C1727 on Lincoln vehicles indicates eps motor circuit malfunction. Au7o has documented this code across 3 Lincoln models — most commonly on Aviator, Navigator, Town Car. C1727 is a steering/chassis code indicating a malfunction in the Electric Power Steering (EPS) assist motor circuit. This motor provides the actual steering boost, and the EPS module monitors its electrical circuit for proper operation. When it detects an open, short, over-current, or otherwise out-of-spec condition in the motor circuit, it sets this code. It generally causes loss or reduction of power-steering assist (heavy, hard-to-turn steering) and an EPS/steering warning light, though the vehicle can still be steered manually with more effort. Typical repair costs on Lincoln range from $300 to $2,500, depending on the specific model and root cause.
Common Causes of C1727
- •Failed EPS assist motor
- •Open, shorted, or high-resistance wiring to the motor
- •Corroded or loose motor power/connector terminals
- •Low system voltage or poor ground to the EPS unit
- •Internal EPS control module driver fault
- •Overheated/over-current condition from excessive load
- •Damaged harness near the steering column or rack
C1727 on Lincoln by Model
Lincoln Aviator(1 issue)
- Aviator Air Glide Suspension — Compressor and Bag Failures2020-2024
2020+ Aviator with the optional Air Glide suspension shares its compressor and air spring design with the related Ford Explorer ST/Platinum. Owners report compressor noise becoming progressively louder by 40,000-80,000 miles, then bag leaks (rear first), then compressor burnout. Warning message: "Service Air Suspension."
Lincoln Navigator(1 issue)
- Navigator Rear Air Suspension Bag/Compressor Failure2003-2017
2003-2017 Navigators with the optional/standard rear air suspension (and the 2003+ Expedition with the same system) develop air-bag leaks at the bag-to-piston seal as the bag rubber ages and cracks. Symptoms: rear of vehicle sagging overnight, compressor running constantly, error message "Check Air Suspension." Eventually the compressor burns out from constant duty.
Lincoln Town Car(1 issue)
- Town Car Rear Air Suspension Bag/Compressor Failure2003-2011
Final-gen Town Car (2003-2011 Panther platform) used a rear-only air suspension that develops bag leaks and compressor burnout very similar to the Navigator/Crown Vic Police Interceptor system. Cars sag dramatically overnight; compressor cycles continually trying to refill.
Looking for C1727 on a different make?
View C1727 across all makes →Frequently Asked Questions
What does C1727 mean on Lincoln?▼
C1727 stands for "EPS Motor Circuit Malfunction." C1727 is a steering/chassis code indicating a malfunction in the Electric Power Steering (EPS) assist motor circuit. This motor provides the actual steering boost, and the EPS module monitors its electrical circuit for proper operation. When it detects an open, short, over-current, or otherwise out-of-spec condition in the motor circuit, it sets this code. It generally causes loss or reduction of power-steering assist (heavy, hard-to-turn steering) and an EPS/steering warning light, though the vehicle can still be steered manually with more effort. On Lincoln specifically, this code is documented across 3 models.
What causes C1727 on Lincoln vehicles?▼
Common causes on Lincoln: Failed EPS assist motor, Open, shorted, or high-resistance wiring to the motor, Corroded or loose motor power/connector terminals, Low system voltage or poor ground to the EPS unit, Internal EPS control module driver fault. Specific causes vary by model and year — see the per-model sections below.
How much does it cost to fix C1727 on a Lincoln?▼
Repair costs on Lincoln range from $300 to $2,500, depending on the specific model and root cause.
Which Lincoln models have C1727 documented?▼
Au7o has documented C1727 on 3 Lincoln models: Aviator, Navigator, Town Car.