Car Inspection / Diagnostics

What Our Car Inspection & Diagnostics Service Includes

Our diagnostics service at Marwat Garage is not simply plugging in a scanner and reading codes. It is a structured, multi-stage inspection that connects electronic data with physical findings to give you the most accurate assessment available in Ajman.

OBD2 Diagnostic Scan — All Modules

We connect to your vehicle’s OBD2 port and scan every available module — not just the engine control unit. This includes the transmission control module, ABS and traction control system, airbag and SRS module, body control module, HVAC system, and instrument cluster. Many fault codes exist in secondary modules and go undetected when workshops only scan the engine ECU. We pull all stored codes, pending codes, and freeze frame data across every accessible system.

Live Data Analysis

Reading fault codes is only the first step. We also monitor live data streams from your vehicle’s sensors while the engine runs — including oxygen sensor readings, mass airflow sensor values, fuel trim percentages, coolant temperature, throttle position, and injector pulse width. Abnormal readings in live data reveal faults that do not always trigger a stored code, such as a lazy oxygen sensor or a partially blocked fuel injector.

Engine and Mechanical Inspection

Electronic diagnostics work hand in hand with physical inspection. Our technicians check the engine bay for leaks, damaged wiring, cracked vacuum hoses, and worn components that affect performance. We inspect belts, check fluid levels and quality, test battery voltage and charging output, and assess the overall mechanical condition of the engine and its ancillaries.

Brake System Check

We inspect brake pad thickness, disc condition, brake fluid level, and hydraulic lines during the inspection. We also scan the ABS module for stored fault codes and check wheel speed sensor readings where relevant — a common fault that triggers ABS warning lights on UAE vehicles exposed to road dust and moisture.

Suspension and Steering Assessment

As part of the full car inspection, we visually assess suspension components for wear — checking for loose ball joints, worn bushings, and any handling-related issues that may explain symptoms such as vibration, pulling, or noise. We identify whether a mechanical or alignment issue is contributing to the vehicle’s complaints.

Air Conditioning System Check

Given Ajman’s climate, AC performance is not optional — it is essential. We check the AC system operation, assess compressor engagement, and check for obvious refrigerant leaks or electrical faults. If a deeper AC fault is suspected, we recommend our dedicated AC inspection service.

Battery and Charging System Test

Weak batteries and failing alternators are among the most common causes of warning lights and electrical gremlins in Ajman’s heat. We test battery health, cold cranking amps, alternator output voltage, and charging system stability — giving you a clear picture of whether your electrical supply is reliable.

Understanding Your Diagnostic Report

After completing the inspection, our technicians prepare a written diagnostic report that categorises every finding. You will receive:

• A list of all fault codes with plain-language explanations of what each code means
• Identified root causes for each fault — not just the symptom
• A priority rating for each issue: immediate action required, address soon, or monitor
• A transparent repair quote for any work you choose to have carried out at Marwat Garage

We walk through the report with you in person. If you have questions — and most customers do — we answer them clearly. You will never leave our workshop confused about what is wrong with your car or what it will cost to fix.

Common Faults We Diagnose at Marwat Garage Ajman

Our technicians regularly diagnose and resolve the following issues for Ajman drivers:

• Check Engine light — misfires, oxygen sensor faults, catalytic converter issues, EVAP system leaks
• Transmission warning light — solenoid faults, gear ratio errors, transmission temperature warnings
• ABS warning light — wheel speed sensor failures, ABS module faults, hydraulic unit issues
• Airbag or SRS warning light — seat belt pre-tensioner faults, sensor issues, clock spring failures
• Rough idle or engine hesitation — dirty throttle bodies, faulty MAF sensors, vacuum leaks
• Poor fuel economy — injector faults, oxygen sensor degradation, EGR valve issues
• Overheating complaints — thermostat failures, coolant sensor faults, water pump issues
• Battery warning light — alternator faults, battery degradation, parasitic drain issues

If your vehicle is displaying any of these symptoms or warning lights, our car inspection and diagnostics service in Ajman will identify the exact cause.

Car Diagnostics for Insurance Claim Inspections

At Marwat Garage, our car inspection and diagnostics service also supports insurance claim inspections. If your vehicle was involved in an accident and is displaying fault codes or warning lights as a result — triggered airbag sensors, ABS faults from impact, electrical system disruption — our diagnostic report provides documented evidence of the damage and its cause. Insurance providers in the UAE accept our professional inspection reports as part of the claims process, helping Ajman drivers get accurate and fair compensation.

How to Book a Car Inspection & Diagnostics Appointment in Ajman

Booking is simple. Call or WhatsApp us on +971-564761112 to arrange a convenient time. Most standard diagnostic inspections are completed within 60 to 90 minutes at our workshop in Industrial Area 2, Ajman. Same-day appointments are available in most cases — call early to secure your slot.

We work on all vehicle makes and models including Toyota, Nissan, Mitsubishi, Kia, Hyundai, Honda, BMW, Mercedes-Benz, Audi, Volkswagen, Chevrolet, and Ford. If your car has an OBD2 port — which all vehicles manufactured after 2000 do — we can perform a full diagnostic scan.

Contact Marwat Garage:

• Location: Marwat Garage, Industrial Area 2, Ajman
• Phone / WhatsApp: +971-564761112
• Working Hours: Saturday – Thursday, 8:30 AM – 10:00 PM
• Website: marwatgarage.com

Frequently Asked Questions — Car Inspection & Diagnostics in Ajman

Q1: My Check Engine light came on but the car seems to drive normally. Do I still need a diagnostic scan? Yes — and soon. A Check Engine light that stays on without obvious driveability symptoms often indicates a fault that has not yet reached a critical stage. Common examples include a failing oxygen sensor, a small EVAP leak, or a catalytic converter beginning to degrade. Left unaddressed, these faults typically escalate into more expensive repairs. Our OBD2 diagnostic scan at Marwat Garage identifies the exact code and root cause so you can make an informed decision about timing and urgency.

Q2: Why does my warning light disappear after a few days? Does that mean the fault has cleared? Not necessarily. Many fault codes are set as “pending” and will clear from the display if the fault does not repeat within a set number of drive cycles. However, the underlying condition that triggered the fault often remains. Additionally, intermittent faults — sensors that drop out occasionally — can be the hardest to catch without a proper scan that reads freeze frame data recorded at the moment the fault occurred. Our diagnostic scan captures this information even after the warning light has cleared.

Q3: Can a car diagnostic scan tell me why my fuel consumption has increased recently? Yes, in most cases. Increased fuel consumption without a change in driving habits is almost always linked to a sensor or mechanical fault that affects the engine’s air-fuel mixture. Faulty oxygen sensors, a dirty or failing MAF sensor, fuel injector issues, or EGR valve problems are common causes. Our live data analysis monitors fuel trim values and sensor outputs directly, identifying the component responsible for the excess fuel use rather than just confirming the symptom.

Q4: How is your diagnostic service different from a free scan at an auto parts shop? A free scan from an auto parts retailer reads basic engine fault codes only — and only provides the code number, not a diagnosis. It does not scan secondary modules such as the ABS, airbag, or transmission systems. It does not analyse live data. And it does not include any physical inspection of the vehicle. Our car inspection and diagnostics service at Marwat Garage covers all vehicle modules, live sensor data analysis, and hands-on mechanical inspection, producing a complete diagnostic report rather than a list of code numbers.

Q5: My car failed its Mulkiya (registration) inspection due to a fault code. Can you help? Yes. This is one of the most common reasons Ajman drivers visit us. A stored fault code — even one that does not affect daily driving — will cause a vehicle to fail the Emirates Vehicle Gate inspection required for Mulkiya renewal. We identify the fault, carry out the repair, clear the codes, and confirm the repair is stable through a drive cycle verification before you return for reinspection. We are familiar with the specific fault types that trigger Mulkiya failures and resolve them efficiently.

Q6: Do you carry out diagnostics on hybrid or electric vehicles? We currently focus on conventional petrol and diesel vehicles and light hybrids at our Ajman workshop. For full hybrid systems (Toyota Prius, Lexus hybrids) we can carry out OBD2 scanning of standard modules. For fully electric vehicles and plug-in hybrids requiring high-voltage system diagnostics, we recommend contacting us directly on +971-564761112 to discuss the specific vehicle before booking, as tooling requirements vary by model.

Q7: Can I get a diagnostic report to show my car dealer if the vehicle is still under warranty? Yes. Our written diagnostic report documents all fault codes, live data findings, and mechanical observations clearly and professionally. If you are pursuing a warranty claim with a dealer or manufacturer and want an independent assessment to support your case, our report provides exactly that. Many Ajman drivers use our independent inspection to verify that a fault exists before approaching their dealer — ensuring they are not dismissed without grounds for a warranty repair.