Test the Boost Solenoid Because of its simplistic design, the first step in diagnosing code P0035 is to check the boost valve itself. If your are for a different car, select that vehicle series before searching for the diagnostic codes because not all used by one manufacture are used by the other makes. Often there is just a hose or clamp loose which is causing a loss of pressure. Look up the other , please use the search box. Cracked hoses are hard to find and are usually not visible, as they are on the bottom of the hose in a low area which allows debris and fluids to collect, causing the hose to become brittle and crack which you can often not feel. If they are correct, then check the bypass valve to determine if it is slightly or completely open allowing boost pressure to escape. If you'd be so kind as to whitelist our site, we promise to keep bringing you great content.
If the test light illuminates, the ground circuit is good. The boost solenoid or bypass valve is normally in the closed position. If air passes through, replace the boost solenoid. While the wires are connected to the solenoid and it is in the switched position, blow through the solenoid again. This can cause internal engine damage, turbocharger or supercharger damage or failure, and oil leaks. With the ignition on and the engine not running, probe the negative or ground circuit at the boost solenoid connector. If the test light illuminates, the positive circuit is good.
Should the solenoid fail to switch, excess pressure can cause turbocharger or engine damage from excess boost. There should be power at the positive wire, indicated by the test light on your probe illuminating. It was hard to determine the problem with just the engine running, so I put a longer hose on the pressure gauge to allow me to watch it while I drove the vehicle. If you have any doubt as to repairs on your vehicle, please contact your technician. Should the solenoid fail to switch, excess pressure can cause turbocharger or engine damage from excess boost.
If air does not pass through the boost solenoid may be blocked or stuck and should be replaced. I've seen code P0033 come up several times when the Check Engine Light comes on. The slip on connection from the hose to the intercooler was holding under low pressure because of the ribs on the intercooler inlet which would start leaking pressure at 12 psi since the clamp could not hold the higher pressure. This is generally going to require replacing the valve or possibly the actuator on the diaphragm operated system. Disconnect the boost solenoid and remove it from the vehicle. This can cause internal engine damage, turbocharger or supercharger damage or failure, and oil leaks.
The bypass valve or boost solenoid actuates the wastegate at a certain pressure, allowing boost pressure to remain within the set allowances for the vehicle. This will cause a code to be stored and a malfunction indicator lamp to be illuminated. On the intake end of the valve, blow air orally through the boost solenoid. I have found that this low pressure code P0035 is most commonly caused by intake hoses, pipes, and clamps not being tight and in good condition causing leaks in pressure. While the wires are connected to the solenoid and it is in the switched position, blow through the solenoid again.
The solenoid will click audibly, indicating that the solenoid has switched. If your are for a different car, select that vehicle series before searching for the diagnostic codes because not all used by one manufacture are used by the other makes. While checking for a short to ground or voltage, perform a wiggle test along each wire to help determine if there is a short. Disconnect and reattach the power source multiple times to ensure the solenoid switches consistently. The information contained on this site is presented for informational purposes only. The information contained on this site is presented for informational purposes only.
The car's wiring can be tested in the normal fashion by looking for broken and lose wire, and all vacuum lines can be checked easily for cracks, leaks and correct routing. What are the common causes of code P0035? I did a careful inspection of the hoses, clamps, and intercooler when I found a plastic clamp on the intercooler inlet hose was actually broken but I could not see it until I pulled on it. If you have any doubt as to repairs on your vehicle, please contact your technician. This code requires immediate attention and should be diagnosed as soon as possible. Repair the wiring as necessary at any section that causes the bulb to go out.
Last it could be a weak water pump. Short to Ground Attach one lead of your probe to a bare ground. At rest, the solenoid should allow air to pass through like a straw. . What are the symptoms of the P0033 code? We are not responsible for any actions you take on your vehicle. The list of automotive Makes at the right edge of the screen.
The currently selected is for the Audi makes. If the test light illuminates, the ground circuit is good. Air should not be able to pass through. What repairs can fix the P0033 code? On some boost solenoids, there may also be a vent to atmosphere or a bypass directly into the intake. Look up the other , please use the search box. The list of automotive Makes at the right edge of the screen. With the ignition on and the engine not running, probe the negative or ground circuit at the boost solenoid connector.
For this P0035 code, the boost pressure is too low for proper engine operation and power. P0033 trouble code definition P0033 is the code for Turbocharger or Supercharger Bypass Valve Control Circuit What the P0033 code means Each manufacturer has a slightly different definition for this code as it is relative to their particular system. If they are correct, then check the bypass valve to determine if it is slightly or completely open allowing boost pressure to escape. With the ignition in the on position and the engine not running, probe the positive wire at the solenoid. Use a 12v probe with a test light to check the boost solenoid wiring.