Personal garage across devices
Vehicles, repair history, expenses and saved part numbers.
Understand the fault.
Check it yourself.
Free interactive lessons, diagnostic guidance and practical repair cases for DIY owners and small workshops. Once you know what part is needed, we source it by VIN across Europe and ship worldwide.
No registrationWorks on mobileParts by VIN
Where to start diagnosis
Choose a symptom to get a clear first-check sequence and a quick route to the relevant trainer, DTC explanation or parts request.
Selected route
Start checking
Battery keeps discharging
Start by measuring voltage at the terminals. Then check alternator charging and key-off current draw.
Multimeter trainer
Task: measure battery voltage correctly. You can drag the probes or tap a probe and then the required terminal.
Practice 1Battery voltage
Virtual workbenchBattery after overnight parking
12 V60 Ah · 540 A
SOURCETEST
— — —
10ACOMVΩ
BLACK
RED
Safe jump-start trainer
Connect two 12-volt systems in the correct sequence, start the vehicles and remove the cables in reverse order. The simulator blocks unsafe connections.
Practice 2Jump-starting
VEHICLE ADischarged
11.4 V
Engine off
VEHICLE BDonor
12.7 V
Engine off
Quick practical guides — no registration
Short practical materials help you understand where to start checking and what information to prepare for accurate parts sourcing.
01Car will not start: the first diagnostic split
First separate two situations: the starter does not crank the engine at all, or the engine cranks but does not start. In the first case begin with power, terminals, grounds and starter. In the second, begin with fault codes, fuel, spark and air.
Check power with a multimeter →02Why an OBD-II code is not yet a diagnosis
A code identifies a system and a condition noticed by the control unit. It does not always name the failed part. Before buying anything, it is useful to check connectors, wiring, air leaks, power supply and related parameters.
Decode a code →03How to prepare an accurate parts request
The most accurate request includes VIN or FRAME, make, model, year, engine, installation side, a photo of the old part and its number. For rare parts, dimensions and mounting photos are useful too.
Send the details →04Safe jump-starting: the key rule
The final black clamp is connected to the designated ground point on the vehicle with the discharged battery, not beside the battery itself. The exact procedure depends on the vehicle, so open its manual before making a real connection.
Open the simulator →My car and local service log
Save make, model and repair notes only in this browser. No registration is required, nothing is sent to the server and other visitors cannot see these records.
ACTIVE VEHICLE
Saved on this deviceNo vehicle added yet
Add a vehicle to keep a repair history and source the right parts faster.
0reports
0part numbers
0 €expenses
0confirmed solutions
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Start the first service log
Describe the fault, record checked parts and mark the result after repair.
Practical repair cases
Practical examples show the vehicle, symptoms, diagnostic path, part numbers, cost and result. They are diagnostic references, not a universal diagnosis for every car.
FROM PROBLEM TO SOLUTION
Everything you need for the next step
Understand the problem, check the most likely causes and move straight to a solution. Use the trainers, diagnostic guidance, repair examples and a fast VIN-based parts request.
●Diagnostics without extra stepsOpen the simulators, guides and vehicle library immediately. If you need a part, VIN, a part number or a photo is enough to start.
Step-by-step reports with photos
Symptoms, diagnosis, steps, parts and a confirmed result.
Ask the author and comment
Clarifications for a specific model, engine and completed repair.
Find a workshop
Specialization, confirmed solutions and fast parts requests.
Reduce repair risk
Review of unsafe instructions, spam, personal data and disputed content.
Rating of useful solutions
The author’s result and editorial review are marked separately.
Enter an OBD-II code
Enter an OBD-II code for a clear explanation of what it means, common causes and sensible checks before buying a part.
OBD
Enter a fault code
Try P0420 or tap one of the examples.
Useful not only for owners, but also for small workshops
When an unfamiliar or rare car is already on the lift, a workshop does not need a week of theory. It needs a fast path to similar cases, test points, part numbers and available parts.
- Search by model, engine, symptom and fault code
- Reports with real part numbers and substitutions
- One request for new, OEM, aftermarket and used options
- Urgent parts sourcing while the car is in the workshop
Workshop request
Need a part today or as quickly as possible?
Enter VIN, engine, removed part number and deadline. We compare offers and report available supply options.
Send VIN and requestNew Genuine · OEM · Aftermarket · Used GenuineLearn with free simulators. We source the parts.
SourceCar Garage turns fault-finding into a ready parts request: vehicle, symptoms, fault code, measurements and suspected part.