Yes, it can.
Some of hoses will make for sure the check engine light come on. It depends on the house. If you are sure that it was the hose reset the computer and check your assumption. If you have access to an error code reader check the error code, it might simplify your life.
I have a 2003 Highlander. Whenever I get the oil changed, the check engine light comes on within a couple of days. I finally figured out that there is a hose under the air filter case that gets disconnected when the filter is checked. Just reattach the hose and the light will reset after a few restarts of the engine.
Its a EVAP leak. I knock a hose off on my passenger side all the time when working on the engine, the check engine light always comes on, look for a loose hose if you havent figured this out already
i need your help to fix this please i try everthing
Something won't be working and the check engine light will probably illuminate.
The computer has detected a malfunction. Sugest that you have it checked for codes. Could be anything from a cracked vacuum hose up to an internal engine problem.
Try removing the valve and blowing air through both passages. If one feels restricted as though from carbon buildup you should clean it out.
Broken vacuam hose, check PVC hose and power brake hose. One possiblity is:you need to check the coolant fluid level. DO NOT OPEN the radiator when it is hot. Hot Coolant WILL scald! Let the engine cool down and check the coolant reservoir. Re-fill the reservoir slowly away from your face. Cold coolant going into a hot engine will boilback and spurt out of the tank. If refilling the coolant does not remedy the problem, it may be more serious and need a mechanic.
check for loose or disconnected vacuum hose
Check the engine coolant level. My 2004 would blow cold at a stop light, then warm by the next light. The top radiator hose was leaking causing the level to be low.
If the air filter has recently been replaced check for a loose hose coming off of the air filter housing. secure the hose and pull the EFI fuse for 30 seconds. This is very common.
To fit a thermostat on a Renault Laguna, check both upper and lower hose of the car. Check the hose that is cool and fit the thermostat on the engine side of that hose.