Land Rover Electrical Faults & Warning Lights Guide
Modern Land Rovers have dozens of modules that are sensitive to battery voltage. A weak battery or a parasitic drain often triggers frightening messages like "Transmission fault" or "Restricted performance" even though nothing major has failed. Testing the battery, charging system and drain first — then reading every module — finds the real cause.
Call (650) 588-9199Labor Time
1-3 hours of diagnosis, then the repair
Typical Cost
Diagnosis first; the repair is quoted once we know the cause
Serving
San Bruno, Hillsborough, Burlingame, San Mateo, San Francisco, Daly City
Warranty
2 years / 24,000 miles on OEM parts, 1-year workmanship
Common Symptoms
If you experience these symptoms, your Land Rover Range Rover, Range Rover Sport, Velar, Evoque, Discovery, Defender may need electrical diagnosis:
Why This Happens
Understanding the root cause helps prevent future issues:
Our Repair Process
How we handle electrical diagnosis at Express Auto in San Bruno:
Load-test the battery and check charging voltage
Measure parasitic drain and isolate the circuit
Read and record faults from every module with a Land Rover-capable scan tool
Repair wiring, grounds or the faulty module; register a new battery when required
Clear faults and confirm the module network stays quiet
Parts & Warranty
Parts Used
battery
Correct-spec battery (AGM where required), registered to the vehicle
Service Details
Labor Time
1-3 hours of diagnosis, then the repair
Typical Cost
Diagnosis first; the repair is quoted once we know the cause
Warranty
2 years / 24,000 miles on OEM parts, 1-year workmanship
Frequently Asked Questions
Is my transmission failing if it says "Transmission fault"?
Often not. Low battery voltage commonly sets that message. We test the battery and charging system before looking at the transmission.
Does a new battery need to be registered?
On many Land Rovers, yes — the charging system needs to know a new battery is fitted. We register it with our scan tool.
Why does my Range Rover battery keep dying?
Usually a weak battery or a module that stays awake after you lock the car. We measure the drain and track down the circuit.
Need this Land Rover repair?
Book online in 2 minutes — no deposit. Honest estimate before any work — we service Land Rover Range Rover, Range Rover Sport, Velar, Evoque, Discovery, Defender and other makes.
Land Rover Repair by Peninsula City
We serve Land Rover owners across the Peninsula — same specialist expertise, no dealer markup.