Loss of power!

ANSWER : Hi there. Actually, the OBD-II error code you listed, P0233, is a generic OBD-II code that is triggered when the engine control module (ECM) detects that the secondary circuit to the fuel pump has an intermittent voltage when the fuel pump relay is turned on. The fuel pump secondary circuit powers the fuel pump and can cause a no start or the engine to suddenly stall while driving, which might be the source of the stalling issue you’re experiencing.

ANSWER : Hi there. When removing the brake booster from a vehicle, you will need to remove the master cylinder and cap off the hydraulic lines. Then go in the cab and remove the pin from the bell crank and unbolt the 4 bolts that hold the booster on. Then remove the booster. Do the opposite to install the booster. If the bell crank pin had a cotter pin to secure it, make sure that you use a new cotter pin. If you need further assistance with removing and installing a brake booster in your vehicle, then seek out a professional, such as one from Your Mechanic, to help you.

ANSWER : I suggest you study the smoke and try to recognize a pattern. It might mean that you have to spend a lot of time looking in the mirror, so try not to be unsafe. If you are having a problem with valve stem seals, you may experience the smoke more when you are letting your foot off of the gas. Decelerating raises the engine vacuum and draws oil past the valve seals and into the intake where it goes on to be burned. Stem seals will also be the diagnosis if you have a big cloud of smoke on starting a car that has been parked several hours or overnight. If you have a problem with piston rings, you will see more smoke when you are accelerating and demanding more power from the engine. Either way it’s going to be a big expense. Many people prefer to put off the repair until the oil starts to foul the spark plugs and the engine begins to skip. If you want to be sure what is going on with your car, contact Your Mechanic to have a technician come to your home or office to check out your car and give you a recommendation.

ANSWER : Many different faults can be attributed to your 2008 Chevrolet Aveo5’s loss of power. In cases where the Check Engine Light has not set a hard code, it can be a bit harder to pinpoint the issue.

If the spark plugs were replaced when the Check Engine Light was able to be read, I can only guess that the code was for a misfire without knowing the actual code. The most likely causes of a loss of power would be a misfire, spark plugs, fuel pump, fuel filter, oxygen sensor, MAF sensor or vacuum leak. A qualified technician, such as one from YourMechanic, will be able to diagnose the vehicle’s loss of power and perform any repairs required.

ANSWER : Hi there. It is very possible that the minor exhaust leak has grown into being the primary cause of your acceleration issue. The exhaust system is engineered to efficiently expel exhaust gases from the combustion chamber through the exhaust system and out the tail pipe. This creates compression and when there is a leak, the internal engine’s combustion is significantly impacted; which can cause these issues. However, there are other fuel or ignition system components that impact acceleration as well as transmission problems as well. It might be a good idea to have a professional mechanic complete a car is slow to accelerate inspection at your location; so they can determine what repairs would be needed to resolve this problem.

ANSWER : I recommend inspecting, then cleaning the throttle body if any deposits are found. It’s important to do this with key off and disconnect the electrical connector to throttle body. Do not put your fingers in there until it is connected. Push throttle plate and if it sticks or binds replace it. Perform the throttle relearn procedure after cleaning. A scan tool is used to clear any diagnostic codes set during this procedure. If you would like this taken care of, an experienced technician with the right tooling, such as one from YourMechanic, can diagnose the loss of power issue and let you know exactly what actions are needed.

ANSWER : It sounds like the vehicle is going into limp mode. This occurs when the powertrain control module (PCM) (also known as the electrical control unit) has determined there is an overboost condition. The computer disables the turbo to prevent damage from occurring. There are many potential causes for an overboost condition, with a failed turbo being just one of them.

Some other possibilities include vacuum leaks, a faulty vane adjustment solenoid, faulty turbo actuator or a bad MAF sensor. There is a technical service bulletin (TSB) # 21-07-65, which advises to check for vacuum leaks before replacing the turbo.

If you would like a second opinion from the dealer, I suggest you give the team at YourMechanic a call to inspect your loss of power condition.

ANSWER : The fuel pressure should be checked to inspect the condition of the fuel pump. If the fuel pressure is low, there may be a problem with the fuel pump or fuel filter. A weak ignition system may also cause a lack of power under load if the spark plugs are worn or if the spark plug wires are old and frayed you can have misfires when under a heavy load. Consider hiring an experienced technician like one from YourMechanic who can come out for a closer inspection of the vehicle in order to offer a more personal diagnosis of your loss of power concerns.