Professional Engine Management for all Vehicles in the Blue Mountains
Checking Your Engine
Has your check engine light come on? This means there’s a problem with your engine or exhaust. There’s a number of reasons your engine light will switch on, some you may not even be aware of. This is why it’s imperative that if this happens to you, bring your vehicle in to Mark Harrison Automotive Service asap. The most common causes of your engine light coming on are:
- Emissions problems (oxygen sensor)
- Faulty spark plugs or wires in the ignition system
- Vacuum hose leak
- Fuel pump or injector issues
- ERG valve failure
- Or simply a loose or damaged petrol tank cap
Quality Engine Repairs & Diagnostics
No matter how minor the problem may seem, get it checked with us before it turns into a much bigger one!
If your engine light has come on, don’t delay. Bring your car into our workshop for a thorough assessment with our professional team. We conduct thorough diagnostics of your engine system and carry out the repairs you need to get your car running smoothly and efficiently again.

Experienced Engine Mechanics
From family cars to commercial fleet vehicles such as vans and Utes, we perform expert engine repairs and servicing on a range of vehicles in the Blue Mountains region. We have the skills and experience to get the job done right, and fast, so you can get back on the road as soon as possible.