Fault codes from all control units
Engine, gearbox, ABS, airbags, electrics — not just the engine. Active codes and those stored in history.
Check engine light on? I'll check the cause at your place, not just clear the code
The engine light is only a symptom. I connect a diagnostic computer, read fault codes from all control units and live data, then check the suspect component with an actuator test and a measurement. That way you do not replace parts blindly, and you know whether you can keep driving.
Fault codes from all control units
Live data and actuator tests
Call-out within 50 km
Computer diagnostics
from 80 zł
Plus a 150 zł call-out within 50 km. When a fault needs longer to find: 150 zł per started hour. I quote the price before I set off.
Call me — I will come
Why it matters
Clearing the code isn't a repair
The light comes back if the cause stays.
A fault code points to a circuit or system where something is wrong — not always to a specific part. Clearing the code turns the light off but does not remove the cause, and often it comes back within days.
So after reading the codes I take a second step: live data (how the sensor, mixture and temperature behave) and actuator tests, which means operating components from the computer: the EGR valve, throttle, fan, an injector. Then you can see whether the component reacts as it should.
Finally I tell you plainly: whether you can keep driving or must stop, what the cause is and what the repair may cost.
- The check engine light is on, the car drives normally
- The car jerks, has lost power or has gone into limp mode
- Higher fuel consumption, uneven idle
- The light goes out and comes on by itself
- Before the MOT — checking emissions system readiness
Scope
What I do on site
From reading the code to testing a specific component.
Live data
How sensors and the system behave while running: temperatures, pressures, mixture corrections.
Actuator tests
Operating components from the computer (e.g. EGR valve, throttle, fan, injectors), where the car model allows it.
Component and circuit measurement
When a test or data raises doubt, I measure supply, earth and signal — before I suggest replacing anything.
Emissions readiness
Lambda sensors, EGR, catalytic converter: whether the car will pass the MOT.
Decision: drive or stop
I tell you whether the fault is dangerous or can wait, and what to do next.
Honestly: what I don't do
I do not switch off or "permanently clear" the DPF, EGR or AdBlue — it is illegal and the car will not pass the MOT. If the cause is a clogged system, I will say so plainly.
If the fault needs a workshop (engine mechanics, a ramp), I will say so before any repair begins.
Prices
What it costs
The price is simple: call-out plus work. I quote the total by phone before I set off.
| Item | Price | Notes |
|---|---|---|
| Computer diagnostics | from 80 zł | Reading fault codes and control-unit data |
| Call-out | 150 zł | Within 50 km of Grodzisk Mazowiecki |
| Fault finding and repair | 150 zł per started hour | When a service has no fixed price |
| Weekend work | +20% | Saturday and Sunday |
| Urgent night call-out | price by phone | Agreed before I set off |
Parts are not included in the labour price. I quote before I set off — never after the fact.
How it goes
What it looks like
From symptoms to an identified cause.
Phone call
You describe what is lit and how the car behaves — drives normally, jerks, loses power. I tell you straight away whether you can drive and quote the price.
Call-out and readout
I come to the agreed place, connect the computer and read the fault codes and data from all control units.
Tests and measurements
I check the suspect component with an actuator test and a measurement of supply, earth and signal.
Result and repair
I explain the result in plain language. I repair on site if possible, and if not I say plainly what next.
Questions
Common questions
Question not here? Call me — I will answer straight away.
Computer diagnostics is from 80 zł, and the call-out is 150 zł within 50 km of Grodzisk Mazowiecki. When a fault takes longer to find, work is 150 zł per started hour. I quote the price before I set off.
It depends on the symptoms. When the light is steady and the car drives normally, you can usually get to a safe place — but do not ignore it. When it flashes or the car loses power, stop and call me.
No. Clearing turns the light off but does not remove the cause. I clear a code after identifying the cause and checking it does not return.
No. It is illegal and such a car will not pass the MOT. If the cause is a clogged system, I will say so plainly.
Reading fault codes works on most passenger cars. The scope of actuator tests depends on model and year — I tell you by phone what I will be able to read before we agree.
Readout and initial diagnosis are usually 30–60 minutes. With harder faults I tell you in advance how long it may take.
See also
Related services
A warning light rarely comes on for no reason.
Sensor replacement
Measurement and readout first, then the sensor is replaced — right where the car is.
Electrical fault finding
I find the cause by measuring: current drain, shorts, open circuits, intermittent faults.
Computer diagnostics before purchase
A full control-unit scan for any car, not only hybrids.
Warning light on? Call me
Describe the symptoms and the car — I will tell you whether it is worth me coming.
Real repairs, not a brochure
I film what I actually do — including the jobs that did not go my way.