- P1033 - Nitrogen Oxides Sensor Signal Too Low
- P0133 – Meaning, Causes, Symptoms, & Fixes
- P1033 OBD Trouble Code
- Nox sensor. What does it do & what happens when it fails?
P1033 - Nitrogen Oxides Sensor Signal Too Low
This can happen for multiple reasons and a mechanic needs to diagnose the specific cause for this code to be triggered in your situation. Our certified mobile mechanics can come to your home or office to perform the Check Engine Light diagnostic. Each manufacturer has a slightly different definition for this code as it is relative to their particular system. This generally means there is a problem with the bypass system for the turbocharger or supercharger to relieve pressure either completely or partially depending on how the system is designed. Sensor input voltage signals to the engine control module ECM that indicate a boost level reading less or greater normally less than 9-psi or more than psi than specified by the manufacturer. This will cause a code to be stored and a malfunction indicator lamp to be illuminated. The ECU recognizes this data as an inability to effectively control boost levels and proper engine operation. If the boost is less than 9 psi, it can indicate that pressure is being sent through the bypass valve when it should not be open. The ECM will not be able to control the bypass valve and the turbo or supercharger will work erratically, causing loss of power or jerking during acceleration. A mechanic will verify the code with an OBD-II scanner, then he should reset the code and road test the vehicle to determine if the Check Engine Light comes back on and the P code returns. Depending on the manufacturer, a boost pressure test will need to be determined to see if the boost pressure is within the manufacturer's recommended range. If the pressure is too low, an inspection of the intake hoses and pipes must be done to find leaks. If the pressure is too high, a diagnosis of the bypass valve should be done. The bypass valves are operated differently depending on the manufacturer. Some are spring operated and others, especially Asian models, are diaphragm operated with an electric sensor and control system. The most common mistake for this code is related to assuming that basic components are operating normally. Commonly, this issue is related to intake leaks, after the turbocharger to the intake throttle valve. Often there is just a hose or clamp loose which is causing a loss of pressure. This code requires immediate attention and should be diagnosed as soon as possible. The vehicle will still run but serious damage can occur to the engine if the problem is not repaired, especially if the boost exceeds the manufacturer's specifications. Do a pressure test on the intake system between the turbocharger and intake throttle valve. This will verify if the pressure is too low or too high as specified by the manufacturer.
P0133 – Meaning, Causes, Symptoms, & Fixes
P1033 OBD Trouble Code
Code P is triggered when the voltage output that your O2 sensor is meant to send to your ECM does not change quick enough in relation to the air to fuel ratio when you press on the gas pedal. This trouble code will most likely not prevent your vehicle from running, but it is still something that we recommend you get fixed as soon as possible. This code can cause harmful pollutants to be emitted from your vehicle into the air, which is extremely bad for the environment. You also will not be able to pass emissions tests with this code present. The most common diagnosis mistake is not doing a visual inspection of the O2 sensor or the Mass Air Flow sensor before replacing it. Exhaust and Engine Vacuum Leaks can also cause P to be triggered. For error code P, one or more of the below repairs may be needed to solve the underlying issue. For each possible repair, the estimated cost of repair includes the cost of the relevant parts and the cost of labor required to make the repair. O2 sensor bank 1, sensor 1 is located in front of the catalytic converter, towards the front of your engine. Hello i have a quesrion i have a crown Victoria ex police and,i have the code p so i pit a new o2 sensor and,i delet the,code,but is still show me,the,code and,the,car feel run roughly and,i hear by the gas thank a whistle so i think is a vaccum there. So can u help me,please thank you. Mass airflow sensor will be in the air intake right after the air filter. I have replaced the bank 1 and 2 02 sensors and also replaced the mass air flow sensor and the code and check engine light comes on now once the fuel gauge gets about a half a tank. I fill it up and it goes away until half a tank again. Mine does the same thing. It appears like there is a vacuum leak in the line from the fuel tank to the charcoal canister, or vacuum source to the fuel tank. I am told a smoke test at a repair shop is required to find the leak. I have exactly the same problem as Art has. I figured when I open the gas tank lid, soda can effect pops up as if there was some pressure that was released and then noise goes away. Don is right. There is most likely a vacuum link. Yes No