Check engine light came on and the car started misfiring badly. Diagnosed it properly as a coil pack fault and had it sorted the same day.
T
Tom H.
Grays
ENGINEDIAGNOSTICS
Warning light, misfire, or sudden power loss? We find the real cause. Accurate diagnostics and repair from our Grays workshop.
OBD Fault Code Reading
Misfire Specialists
Same-Day Diagnostics
Warranty on Repairs
JLR-Trained Technicians
Detailed Overview
Accurate Engine Diagnostics for Range Rover and Land Rover
Based in Grays, Essex, we specialise in diagnosing Range Rover and Land Rover engines properly, reading OBD fault codes alongside live data rather than replacing parts on assumption.
Misfires, timing faults and unexplained power loss all have distinct diagnostic signatures, and our technicians know exactly what to check for on JLR powertrains specifically.
That focus means fewer wasted parts, faster repairs, and a clear explanation of what's actually wrong with your vehicle before you agree to anything. We aim to get you back on the road with a fix that lasts, not a temporary workaround.
Diagnostics You Can Rely On
We back every diagnostic and repair with clear assurances, because guesswork has no place when it comes to engine faults on your Range Rover or Land Rover.
Diagnosis Before Any Parts Fitted
We identify the confirmed fault before recommending repairs, so you're never paying for parts based on assumption rather than evidence.
Warranty on Every Repair
All diagnostic repairs carried out at our workshop are covered by a written warranty on parts and labour, giving you confidence the fix will hold.
Unsure What's Triggering the Warning Light?
Speak with our diagnostics specialist to get a clear answer before any parts are replaced.
01708 592377Diagnostic Approach
Full fault code reading combined with live data analysis, so repairs target the actual cause rather than the symptom.
- OBD scan and fault code reading
- Live data checked under load
- Misfire and timing fault testing
- Clear explanation before any repair
Range Rover kept losing power randomly on the motorway. These guys traced it to a sensor fault that two other garages had missed entirely.
N
Nicola D.
Purfleet
Diagnostic Work
Engine Faults We've Diagnosed and Repaired
Specialist Range Rover And Land Rover Repair Process
Process SectionHow We Diagnose Engine Faults Properly
Warning lights, misfires and power loss can all stem from several different causes, so we follow a structured diagnostic process on every vehicle rather than jumping straight to parts replacement.
Step 1 — Full OBD Fault Code Scan: We read stored and pending fault codes to identify which systems are reporting issues before physically inspecting anything.
Step 2 — Live Data and Symptom Analysis: Live sensor data is checked under real conditions, helping us confirm whether a fault is intermittent, load-related or constant.
Step 3 — Targeted Physical Inspection: Based on the diagnostic findings, we inspect the specific components most likely responsible, from ignition parts to timing components.
Step 4 — Repair, Clear Codes and Retest: Once repaired, we clear fault codes and road test the vehicle to confirm the issue is fully resolved before handover.
Warning Light On or Engine Running Rough?
Book a full diagnostic with our Grays team and get a clear answer before the fault gets worse.
ADVANCED DIAGNOSTICSREADING FAULT CODES IS ONLY THE STARTING POINTFAULT CODE ANALYSIS
Many garages treat an OBD fault code as the final answer, but on Range Rover and Land Rover engines, a single code can point to several possible causes. A misfire code, for example, might relate to ignition coils, fuel delivery, or a timing fault, and fitting parts based on the code alone often fails to fix the problem.
Our technicians treat fault codes as a starting point for investigation, using live data and physical testing to confirm the actual cause before recommending any repair. This deeper diagnostic approach is what separates a lasting fix from a repeat visit.
WHY SUDDEN POWER LOSS NEEDS CAREFUL DIAGNOSISPOWER LOSS DIAGNOSIS
Unexplained power loss can be alarming, and its causes range from a simple sensor fault to more serious mechanical issues within the engine or turbo system. Rushing to conclusions here risks expensive, unnecessary repairs that don't solve the underlying problem.
We test methodically, checking sensor readings, boost pressure and timing data under realistic driving conditions to isolate exactly what's triggering the power reduction. This careful approach means our customers get an accurate diagnosis first time, rather than a series of parts swapped in trial and error.
SYSTEMATIC TESTINGDIAGNOSTIC PRECISION THAT SAVES TIME AND MONEY
We combine OBD fault code reading with live data analysis and physical inspection, rather than relying on any single source of information.
This layered approach lets us confirm the true cause of a misfire, warning light or power loss quickly and accurately, avoiding the cost and inconvenience of parts fitted on a trial basis that don't resolve the fault.
REPAIRS BACKED BY REAL TESTING AND WARRANTY
Once a fault is repaired, we clear all codes and road test the vehicle under realistic conditions to confirm the issue is genuinely resolved, not just temporarily masked.
Every repair is covered by a clear warranty, giving you confidence that the diagnosis was accurate and the fix will hold up under everyday driving.
COMMON ENGINE QUESTIONS
Straight Answers, No Jargon
A check engine light can indicate anything from a minor sensor issue to a more serious mechanical fault, including misfires, timing problems or emissions faults. A full diagnostic scan identifies the exact cause, so you know what's wrong before agreeing to any repair.
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