I have this code do not know what I need help P0234 code
vw passat 2.0tdi automatic 2005
My car has 160000 miles.
My car has an automatic transmission.
Experienced mechanics share their insights in answering this question :
Trouble code P0234 indicates the powertrain control module (PCM) senses a dangerously high boost pressure from the engine’s forced induction system. Levels of boost in excess of recommended levels can compromise the structural integrity of the engine. If you need help resolving the trouble code, YourMechanic can send out a professional technician to diagnose and/or fix your vehicle at your home or place of business.
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The meaning of fault code P0234
DTC P0234 is triggered when the control module recognises that the boost pressure is dangerously high for the engine. The turbocharger generates boost pressure, forcing more air into the engine so that the unit can achieve a greater power output.
The P0234 code happens when the powertrain control module (PCM) notes an overly high pressure in the forced induction system.
Overboosting can generally be remedied by altering boost control settings or fixing mechanical faults i.e. vacuum line to wastegate popped off/tore unless the underlying cause of the overboost condition is boost creep.
Once the PCM perceives that the boost pressure has exceeded the manufacturer-specified limit, it will trigger code P0234. This code must be addressed right away to avoid damaging other engine components.
In most cases, overboost is automatically activated, usually by accelerating at full throttle. Depending on the make and model of car, the power may actually be limited in the lower gears to avoid wheelspin, with the overboost feature only coming into effect during overtaking manoeuvres or in higher gears.
What the P0234 code means. P0234 is a generic OBD-II code that is triggered when the Engine Control Module (ECM) detects that the intake boost pressure sensor input signals intake pressure above the maximum specified pressure by 4 psi for more than 5 seconds.
P2563 is an OBD-II generic code. The engine control module (ECM) monitors the variable geometry turbocharger electronic actuator. This code indicates that the ECM has detected a problem with the variable vane geometry turbo control.
P0236 is a diagnostic trouble code (DTC) for “Turbocharger Boost Sensor A Circuit Range/Performance”. This can happen for multiple reasons and a mechanic needs to diagnose the specific cause for this code to be triggered in your situation.
Overboost is when the turbocharger runs at a higher pressure (forces more air into the engine) than would be sustainable on a constant basis. The duration of overboost is usually limited to 10-20 seconds and the result is a power gain of around 10%, on average, for that period of time.
Overboost in Supercharged and Turbocharged Engines
If the throttle is opened too quickly, the high pressure enters the cylinders and is compressed to even higher pressure which can cause detonation, overheating, or cylinder damage.
The ECU will safeguard your engine from an overboost condition. With the `Overboost Protect` option Enabled, you will be able to set the Absolute Maximum manifold pressure that is allowed to occur before the fuel or ignition is cut as per the `Overboost Cut Mode` option.
Can turbo failure cause engine damage? Ignoring blown turbo symptoms can cause further damage to the car`s engine. The more you drive your car with a blown turbo, the more damage the engine will have and therefore will cost more to repair.
Possible causes of low boost pressure can be broken hoses, contamination build-up within the turbine or compressor areas, leaking seals, damaged shaft bearings, the wastegate sticking open or operating incorrectly, a leak in the intercooler, a blocked air filter, a damaged diesel particle filter, or a damaged catalytic …
The turbocharger actuator, also called control box or boost pressure regulator, is an electronic control device for adjustable turbochargers and is predominantly used for Variable Nozzle Turbine (VNT) and Variable Turbine Geometry (VTG) turbochargers.
High amounts of carbon build-up within the VNT mechanism and lever arms indicate a blocked DPF, and the driver may experience turbo lag or over boost of the turbo.
Low turbo boost pressure occurs when the turbocharger is not providing enough air to the engine. This can be caused by various factors, such as a faulty turbocharger, air leaks, or a malfunctioning wastegate.
Relevant Questions and Answers :
the most relevant questions and answers related to your specific issue
I have a Code P0601 on the PCM. I replaced the PCM, and now I have a code P0118, code P0123, and code P0193.
Hi there, the short answer to your question is no . A PCM with a P0601 (which is a memory module error in the PCM) cannot reliably retrieve codes for the codes you list (P0118 – coolant temp sensor, P0123 – throttle position sensor, P0193 – fuel rail pressure sensor.
Most likely, the P0601 prevents the PCM from getting any codes from the engine sensors. The memory module error may cause in data corruption for collected sensor values, lose of data over multiple sampling periods, or failure of the data collection to work at all. Replacing the PCM was a necessary expense.
If you need assistance with the "new" codes, I would recommend having a Check Engine Light inspection completed by a mobile, professional mechanic, such as one from YourMechanic, to diagnose the new error codes and get an accurate assessment of the repairs needed.
Can i retrieve CEL code from car … forgot what code it hade in my car .. put headgasket sealer and i erase the code ..
Once a trouble code is erased, it cannot be retrieved. The engine controller does not have a "recycle bin" like they have on Windows. If the car still has a problem, the code will come back up after some driving. However, the controller will not turn on the CEL until it has seen the malfunction on two separate "trips." A "trip" is a driving cycle where the car is started cold, driven until it is fully warm and through a certain number of accelerations, and shut down. So you might not see the CEL for a couple of days. As for the "head gasket sealer," I wouldn’t hold out too much hope of that solving a problem. At the very best it might put off the symptoms for a short while. If you need help interpreting codes that come up, or solving a head gasket issue, contact Your Mechanic. They can send a technician to your home or office to read the codes on your car and help you decide what to do.
It threw a code 21 , throttle position sensor bad code. i replaced it and the code went away but i still have no spark.
Hello and thank you for contacting YourMechanic. The problems that you are encountering with your vehicle, could be caused by the harness to the Throttle Position Sensor (TPS) or the computer itself.
Check the harness to the TPS for any debris or any corrosion. Hook up a paperclip to the harness and turn on the key. Use a multimeter and check for voltage at the pins of the harness. Make sure that the ground on the sensor is grounded and has no resistance. If you find that the harness is having too much resistance, then I recommend having the main engine harness replaced. If you have replaced the harness and still have the same problems, then the computer will need to be flashed or replaced.
I recommend having a professional, like one from YourMechanic, come to your home to diagnose your car’s no start condition before replacing any parts.
Check Engine Light codes. 2006 Mercedes Benz E55 AMG
Since you are getting many different codes from different areas of the engine, you may need to have the system hooked up to a factory scanner since most of these generic codes do not cross over in my repair software. I would also check with the local dealer to see if any service campaigns are open on the vehicle since there are over 30 possible campaigns that could pertain to this vehicle and some of the problems you are having with the secondary air system. This may be the cause of some of the codes and supercharger disabling. If you’d like to have this checked elsewhere, a qualified pro from YourMechanic can come to your car’s location to go through each Check Engine Light code firsthand and have them resolved.
EGR code, Cylinder 4 misfire code 0304 detected.
Hi there. The Exhaust Gas Recirculation (EGR) valve may be not designed for the emissions requirements for U.S. standards. If the EGR is pulling from cylinder number 4 and after replacing the EGR and the computer detects a misfire, then the EGR is malfunctioning and not responding. When you close off the tube to the EGR and the EGR light comes on and the misfire light goes out, then the EGR is not responding to your emissions system. I recommend replacing the EGR with the OEM specified part for the engine and all of the issues should go away. If you need further assistance with your misfire and EGR, then seek out a professional, such as one from Your Mechanic, to help you.
Service engine warning, MAF code and O2 sensor code, along with check suspension light are turned on
Hello, it sounds like you have quite a few things going on. I am going to do my best to break them down for you.
First if the engine is very loud when idling and the belt has already been replaced, there may be an issue with the tensioner or idler pulley.
Next, the Navigator is known for needing service to the air suspension system as it gets up in miles, the most common causes of these are the air struts themselves have failed, or one of the air lines has a leak.
Lastly, if the O2 sensor and MAF are continually coming back after the sensors have been replaced, the most common cause would be either an exhaust leak or a vacuum leak.
Qualified technicians such as the ones at YourMechanic will be able to diagnose these issues and recommend the best path to repair, starting with a diagnosis of your warning lights.
I had my ECS replaceed and my TPS and the code for TPS was gone but the ECS code came on after 5 miles is it possible the new one
There is a possibility the new module is faulty, but there may be something else going on with the car as well. Wiring can be an issue with these vehicle so consider hiring an experienced technician like one from YourMechanic to loo at the car and offer a personal diagnosis. You can have bad knock sensors offering false readings or some faulted wiring.
Why do I keep getting a P0101 code in my 2011 Nissan Sentra
Hello. If you are continuing to get the same code then the engine needs to be checked first for any vacuum leaks. The slightest leak in the intake tubes or any of the vacuum hoses or gaskets will cause this. I usually will do a smoke test to find the issue. If there are no leaks then you may have a defective sensor. I do not like to use re-manufactured MAF sensors. If the sensor is known to be good then it may be a circuit issue, which is rare on this vehicle. If you need help with this, consider YourMechanic, as a certified mechanic can come to you to [diagnose why the check engine light continues to come on] https://www.yourmechanic.com/services/check-engine-light-is-on-inspection