P0235 - OBD Trouble Code

<<See All OBD Codes

The P0235 is a generic code which can be defined as turbocharger boost sensor “A” circuit malfunction. This fault code gets triggered up when the engine control module would detect the intake boost pressure sensor A input malfunction when compared to the manifold pressure sensor at idle, and with the key which would be turned on before the car engine is started.

The boost pressure sensor would tell the engine control module that how much boost is actually being created by the turbocharger. Now when the powertrain control module would detect an incorrect signal from the boost pressure sensor, then powertrain control module would set the P0235 fault code.

What causes this problem with the Turbocharger Boost Sensor A Circuit Malfunction?

• Boost pressure sensor harness might be opened or shorted
• There can be poor electrical connection in the boost pressure sensor circuit
• Faults in the boost pressure sensor
• Default in the turbo/super charger engine over temperature
• Ignition misfire exceeds the calibrated threshold
• Some defects in the knock sensor

1. Boost pressure sensor - Did your mechanic just found out that there is some fault in the Boost pressure sensor? Buy top notch Boost pressure sensor from us at economical prices.
2. Turbocharger - A damaged Turbocharger can cause a lot of issues. It would be nice if you get it replaced on time.
3. Supercharger - Everything is fine with the Boost pressure sensor and still OBD code P0235 flashing? Then there is definitely some fault with the Supercharger. Get it checked and replace if needed. We have top notch supercharger kit for our customers.
4. Knock Sensor - Knock Sensor is an important car part which should never be neglected. May be there is some fault in it due to which P0235 code may start flashing.
5. Spark Plug - A faulty Spark Plug can be troublesome. You can always rely on us as we have best auto parts for our customers.
6. Intake Manifold Actuator - P0235 code does not really end up spoiling your Spark Plug, but it might also accompany few Intake Manifold issues. We have best Intake Manifold with us.
7. Boost Pressure Gauge - Are you facing OBD Error Code P0235? Don’t worry as you can fix this issue with new Boost Pressure Gauge. We care for our customers, that’s why we have Boost Pressure Gauge for every make and model.
8. Powertrain Control Module - A broken Powertrain Control Module can cause a lot of issues. It would be nice if you get it replaced on time.
9. Engine Control Module - Do you remember when was the last time you got your car Engine Control Module inspected? A damaged Engine Control Module can cause a lot of issues like displaying P0235 code.
10. Wastegate - Poor Wastegate can cause a lot of difficulties, so why not get it replaced at time?

We care for our customers and that’s why we can totally understand your problem. That’s the reason why we have listed out some major symptoms behind the flashing up of OBD Code P0235. They are mentioned here as follows:

Common Symptoms

• The code P0235 will be set which simply means that a problem exists somewhere within this circuit preventing proper boost control. Additional codes in progression may be set regarding this malfunction, each of which pertains to a section of the circuit
• The engine might lack acceleration
• The boost pressure gauge might indicate less than 9 pounds of boost or over 14 pounds of boost. Both can be out of range
• There can be some unusual whining noises or rattling from the turbocharger or piping
• Engine knock sensor code can start appearing which would indicate detonation is occurring due to high cylinder head temperatures
• An overall lack of power in the car engine
• Smoke can start coming out from the exhaust
• Spark plugs may be fouled
• Engine temperature may be unusually high at cruise speeds
• Some hissing noises at the wastegate

We have listed out some ways which would help you to correct the OBD P0235

• Make sure that the engine is running properly with no misfiring plugs and no codes relating to a faulty knock sensor
• On a cold engine, the hose clamps at the turbo outlet should be inspected, intercooler and throttle body for tightness
• Attempt to rock the turbo on the exhaust flange to see if it is tight. Inspect the intake manifold for leaks of any kind including vacuum hoses
• You must remove the actuating arm from the wastegate. Operate the valve manually while looking for a sticking valve causing a drop-in boost
• A non-ported vacuum in the intake manifold should be located and install a vacuum gauge. Then the car engine should be started. At an idle the engine must have between 16 to 22-inches of vacuum. If it has less than 16 the catalytic converter is bad and will not allow boost to build
• Rev the engine quickly to 5000 RPM and release the throttle while watching the vacuum gauge as it displays boost pressure. If boost pressure rises above 19-pounds of boost you have a bad wastegate. If boost fails to rise between 14 to 19-pounds of boost a problem exists with the turbo itself
• Then you must shut the engine down and allow it to cool. The turbo outlet hose should be removed and look inside the turbo to see if the blades are striking the sides of the housing. Look for bent or missing blades or oil in the turbo. Spin the blades by hand and look for grinding or resistance indicating a faulty turbo
• Carefully inspect the oil lines from the engine block to the center turbo bearing and the return line from the bearing to the oil pan for leaks
• Install the dial indicator on the outlet turbine nose and move the turbo shaft in and out. If there is over 0.003 of endplay the center bearing is faulty
• It would be good if the turbo passes these tests. Use the service manual to test the boost sensor and harness using a volt/ohmmeter. Locate the 5-volt reference from the engine control module to the sensor and confirm voltage. No voltage present is an open or short in the harness or poor engine control module
• You should locate the proper reference signal from the boost sensor to the engine control module and confirm a varying voltage as the RPM climbs. No voltage climb would indicate a bad sensor

Now are you thinking that from where will you purchase these car parts? You have arrived at the right place. We at Parts Avatar care for our customers, that’s why we provide best quality of Cold Air Intake, intercooler, Electric Supercharger at marketable prices.

The flow of diagnosis should begin with the most common turbo problems and working systematically down the line too the least likely.

To carry out the process of diagnosis, you must have a vacuum gauge and dial indicator. Follow these steps mentioned below:

• Scan the code and document the freeze frame data in order to verify the problem
• Clear the codes to verify whether the concern comes back
• The operation of the boost pressure sensor should be checked compared to the MAP sensor
• Inspect the turbo boost sensor for blockage of the sensor port
• Carefully check the turbo boost sensor connector for loose or corroded pins

Common Mistakes When Diagnosing The P0235 Code

• You must check the boost pressure sensor hose for some obstructions or kinks
• Make sure that you verify that the connections to the sensor are secure and not leaking or kinked