C1A54 on Land Rover: How to Diagnose & Fix
Manufacturer-Specific EPS/Steering Control Circuit Fault
1 Land Rover model · 1 documented issue
C1A54 on Land Rover by model: symptoms, diagnosis and fix
JLR communications document loss of AWD or a two-wheel-drive-only warning on specified 2012-2016 Evoque vehicles from coupling-oil-pump brush faults, control-module configuration damage or other Active Driveline causes. Later guidance addresses low-speed noise or judder. The records support the coupling-failure identity, but not a universal fluid interval, degraded-fluid cause, controller failure, seizure or the frozen U0300/C1A54 attribution.
How to Fix
Record the exact warning and DTCs, confirm whether the vehicle has Efficient Driveline or Active Driveline, verify matching tires and follow the current VIN-specific JLR pinpoint test. Do not replace a controller, pump or complete coupling or prescribe fluid service from this page; the documented causes differ and there is no universal retail part for the frozen scope.
Sources for this issue (2)
C1A54 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 C1A54 mean on a Land Rover?
C1A54 stands for "Manufacturer-Specific EPS/Steering Control Circuit Fault." C1A54 is an obscure manufacturer-specific chassis code, most commonly seen in the Electric Power Steering family of trouble codes. It generally indicates a circuit or signal fault within the steering control system that the power steering ECU detected as out of specification. Because the exact meaning is defined by the individual vehicle maker, a conservative interpretation is that it points to a steering-system sensor, motor, or wiring problem. Reduced or intermittent steering assist is the typical symptom. On Land Rover it is documented across 1 model: Range Rover Evoque.
What are the most common causes of C1A54?
The most common causes of C1A54 are: Wiring or connector fault in the EPS circuit, Faulty steering sensor (angle/torque), EPS motor or control module fault, Low or unstable supply voltage to the steering ECU, Poor ground connection, Module software/calibration issue. The specific cause varies by vehicle.
How much does it cost to fix C1A54 on a Land Rover?
Repair costs vary widely with the root cause and Land Rover model; each issue on this page carries its own estimate where one is published.
Looking for C1A54 on a different make?
View C1A54 across all makes →Content compiled with AI assistance using NHTSA complaints, TSBs, and owner reports. May contain errors. Always verify with your vehicle's service manual.