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 service 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 cause differs from vehicle to vehicle, so there is no single fix.
Common Symptoms
- AWD warning or loss of AWD
- Two-wheel-drive-only warning
- Low-speed noise or judder
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 change the fluid, until the fault is diagnosed; the documented causes differ.
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.
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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.