Using Scan tool i am getting the following codes via the ODBII. P0171 - System too lean Bank 1 P0328 - Knock Sensor 1 Circuit High Bank 1 P0333 - Knock Sensor 2 Circuit High Bank 2 P0300 - Random Multiple Misfire Detected P0302 - Cylinder 2 Misfire Detected. Where's the best place to start ?
Have you changed the spark plugs? also any OBD code after fixing the above?
SOURCE: Misfire with error codes P0300,P0302,P01303, P0102, P0748
Have you tried new Spark Plugs? Also after removing the plugs.
Take a paper towel and roll it up so it is like a long thick pencil. Stick that down the hole the spark plus came out of. Just to clean the moisture out. Also blow some compressed air down the hole.
Make sure all the moisture is out. The put the plugs in.
When you wash you car. Be careful if you wash the engine.
Dont let water get in to the plug holes..
SOURCE: Misfire with error codes P0300,P0302,P01303, P0102, P0748
have you checked the wires for holes.
SOURCE: My Emissions Test Failed. Two Fault Codes: P0136
under normal condtions i would say yes. given that if you strip the unit, you will be having it towed an exhaust shop, just let someone else do it with the proper tools. shouldnt take more than 30 minutes. pay for the piece of mind.
SOURCE: I have a 05 VW
Try the crank pisition sensor that is vary likely to be the couse of your misfires its working but its intermintly shorting out telling the pcm that you have a misfire and setting the codes
SOURCE: 2003 Beetle turbo-13 trouble codes-PO300-multiple
Low fuel pressure will cause many of those codes to set.
Should have around 3.5bar pressure at idle and full throttle.
Check to see if VW has a recall on the ignition coils. They are cheap to replace however.....you will need your VIN# when you call.
Alternator problems can also trip codes . Check for a/c ripple at BATT + on Alternator...no more the 0.05vac allowed.
Valve train noise common complaint. ...often due to lack of oil services and/or incorrect oil type.
All 1.8T engine will clatter on start up one time or another and is considered normal as long as it goes quiet after 2 to 5 seconds at idle.
You should have synthetic oil in the engine.
P0012 is often timing incorrect. ...check timing belt at tdc.
These engines need a timing belt every 50,000 miles not the 100,000 miles VW suggests. Belt failure is catastrophic.
Transmission codes often corrosion in loom connections under battery. These need checked and cleaned with a solution of STABILANT22A applied to the pins.
If a scanner is available clear the codes and drive for 40 miles or so and recheck for codes. Transmission codes are not always due to transmission faults. They need 200 miles to re adapt after batter replacement or power off.
ROSS TECH site has lots of info' and a scanner program for your lap top.
Testimonial: "Great information. Thanks."
The
following are the general instructions on the start of diagnosing any
electronically controlled engine or transmission problem.
The engine and the automatic transmission (transmission control is only for automatics, engine is still computer controlled no matter the transmission type) in this vehicle are computer controlled and in most cases when a fault occurs a fault code is stored in the memory of the computer control module. There are exceptions to this, such as the Mass Airflow Meter and fuel pressure problems. What must be done is to have all the basic testing done such as a scan of the system for fault codes as well as a check with a live data scanner tool for engine functions that are not within range of normal, a trained technician is required to know what is correct and what isn't, then based on careful diagnostics done from a factory repair manual the correct part is replaced or the wiring repaired or the computer replaced (known as the PCM or ECM,ECU), which is very rarely the problem. Other basic checks must be done as well such as mechanical problems with the engine as well as engine state of tune and mileage on the engine. The transmission can have mechanical issues as well such as no gear engagement at all or a failed pump or other pressure related problems. Also engine mechanical problems can and do cause many drive-ability related problem such as rough idle and other symptoms.
The
following are the general instructions on the start of diagnosing any
electronically controlled engine or transmission problem.
The engine and the automatic transmission (transmission control is only for automatics, engine is still computer controlled no matter the transmission type) in this vehicle are computer controlled and in most cases when a fault occurs a fault code is stored in the memory of the computer control module. There are exception to this, such as the Mass Airflow Meter and fuel pressure problems. What must be done is to have all the basic testing done such as a scan of the system for fault codes as well as a check with a live data scanner tool for engine functions that are not within range of normal, a trained technician is required to know what is correct and what isn't, then based on careful diagnostics done from a factory repair manual the correct part is replaced or the wiring repaired or the computer replaced (known as the PCM or ECM,ECU), which is very rarely the problem. Other basic checks must be done as well such as mechanical problems with the engine as well as engine state of tune and mileage on the engine. The transmission can have mechanical issues as well such as no gear engagement at all or a failed pump or other pressure related problems. Also engine mechanical problems can and do cause many drive-ability related problem such as rough idle and other symptoms.
The
following are the general instructions on the start of diagnosing any
electronically controlled engine or transmission problem.
The engine and the automatic transmission (transmission control is only for automatics, engine is still computer controlled no matter the transmission type) in this vehicle are computer controlled and in most cases when a fault occurs a fault code is stored in the memory of the computer control module. There are exception to this, such as the Mass Airflow Meter and fuel pressure problems. What must be done is to have all the basic testing done such as a scan of the system for fault codes as well as a check with a live data scanner tool for engine functions that are not within range of normal, a trained technician is required to know what is correct and what isn't, then based on careful diagnostics done from a factory repair manual the correct part is replaced or the wiring repaired or the computer replaced (known as the PCM or ECM,ECU), which is very rarely the problem. Other basic checks must be done as well such as mechanical problems with the engine as well as engine state of tune and mileage on the engine. The transmission can have mechanical issues as well such as no gear engagement at all or a failed pump or other pressure related problems. Also engine mechanical problems can and do cause many drive-ability related problem such as rough idle and other symptoms.
The
following are the general instructions on the start of diagnosing any
electronically controlled engine or transmission problem.
The engine and the automatic transmission (transmission control is only for automatics, engine is still computer controlled no matter the transmission type) in this vehicle are computer controlled and in most cases when a fault occurs a fault code is stored in the memory of the computer control module. There are exception to this, such as the Mass Airflow Meter and fuel pressure problems. What must be done is to have all the basic testing done such as a scan of the system for fault codes as well as a check with a live data scanner tool for engine functions that are not within range of normal, a trained technician is required to know what is correct and what isn't, then based on careful diagnostics done from a factory repair manual the correct part is replaced or the wiring repaired or the computer replaced (known as the PCM or ECM,ECU), which is very rarely the problem. Other basic checks must be done as well such as mechanical problems with the engine as well as engine state of tune and mileage on the engine. The transmission can have mechanical issues as well such as no gear engagement at all or a failed pump or other pressure related problems. Also engine mechanical problems can and do cause many drive-ability related problem such as rough idle and other symptoms.
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Has the 1.8L I4 engine
Latest update after fixing vacuum leaks in hoses and throttle body base. Also had 1 coil bad and replaced. Now the car misfires on initial startup. It is not cold, I live in the California Desert 80 degrees. I get codes form random misfire and usually all cylinders. If I try to play with gas pedal I can usually get it to finally increase Rpm's and then it will even out and run smoothly. Vacuum pressure is good, Fuel pressure is good, 3.3 bar running, 4.0 bar when removing vacuum to pressure reg, and 2.6 bar when shut-off. Only happens on initial start or after car has set for a couple of hours. FYI - Fuel filter was replaced. All injectors and coils test OK
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