Hybrid & EV Diagnostics
Hybrid and electric cars carry a high-voltage battery, an inverter and electric motors in addition to, or instead of, a normal engine. Diagnosing them needs tools that read battery cell data and an understanding of the safety rules around high voltage.
From AED 249Written quote after diagnosis, before work startsConvenience fee applicable · shown on your written quote
- 2 to 4 hours
- Pickup and delivery from your door
- Convenience fee applicable · shown on your written quote
- Diagnosis free with repair
Signs you need hybrid & ev diagnostics
- A hybrid system or battery warning on the dash, or a message to see a service centre
- Lower electric range or a battery gauge that drops quickly
- The petrol engine runs more often than it used to
- The car goes into reduced-power mode or will not switch to Ready
- Charging stops early, or a charge port will not lock or start
- The cooling fan for the battery is loud or runs all the time
What usually causes it
Weak cells in the hybrid battery
The battery is made of many cells. When one or two weaken, the pack's voltage balance drifts and the car uses the engine more. The scan shows the voltage of each block.
Battery cooling problems
Dust blocking the battery cooling intake or a dying fan makes the pack hot, which shortens its life. This matters in our climate.
Inverter or coolant faults
The power electronics have their own coolant loop. A weak pump or low coolant can set a fault and limit power.
12-volt battery trouble
The small conventional battery wakes the system up. A weak one produces many confusing warnings on hybrids and EVs.
How we do hybrid & ev diagnostics
- 1
Check the 12-volt side first
Many hybrid faults are caused by a weak auxiliary battery, so we test it before opening the high-voltage system.
- 2
Read hybrid and battery data
We read cell-block voltages, temperatures, state of charge and insulation readings and compare them with a healthy pack.
- 3
Inspect cooling and connections
The battery fan, intake filter, coolant level and visible high-voltage connections are checked, with the system isolated by trained personnel before anything is touched.
- 4
Explain the state of health
You get a clear view of the battery's condition and whether repair, rebalancing or replacement is the sensible route.
By make and model
Toyota Prius and Lexus hybrids
Hybrid battery cooling air intakes can clog with dust, so cleaning the intake and fan is a routine check on these models in a dusty climate.
In Dubai, Sharjah and Ajman
Batteries dislike heat, and the climate here is the toughest test for a hybrid or EV pack. Parking in shade or underground and keeping vents clear makes a real difference to battery life. Anyone buying a used hybrid in Dubai should get the pack's health read before paying, as a replacement is a large cost. We do not guess at range, and we are clear about what our tools can and cannot read on your model.
Questions about hybrid & ev diagnostics
Can you work on a high-voltage system?
Diagnosis and the checks on this page are carried out with high-voltage isolation procedures. If a repair needs specialist equipment, we tell you before we start.
Is a hybrid battery always expensive to replace?
It can be, but options exist beyond new: rebalanced, refurbished or used packs. The choice and price are listed on the written quote.
How do I know my battery's health before buying a used hybrid?
A diagnostic read shows block voltages and imbalance, and that is far better evidence than the dashboard gauge.
Can you diagnose charging problems on an EV?
We can read charge-related faults and check the vehicle side. If the fault is in your wall charger or supply, an electrician is needed for that part.
Last updated
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Tell us about your car. You get an itemised quote before any work starts, and you choose OEM, aftermarket or used parts.