Question about 2003 Volkswagen Jetta TDI

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Codes po302,po303,po300 vw jetta2001 - 2003 Volkswagen Jetta TDI

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6 Suggested Answers

6ya6ya
  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

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Posted on Jan 02, 2017

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j_del
  • 1586 Answers

SOURCE: 1999 vw jetta 2.0

Sounds like two problems. P0300 and P0303 are possibly spark plugs. They could be a coil pack but I'm leaning toward a spark plug problem because of the other two codes - they're indicating O2 sensor problems. If the O2 sensors are screwed up, the car reverts to preprogrammed, rich fuel maps that send excessive fuel through the engine. The reasoning is, if the ECU can't trust the O2 sensors to determine how much fuel to burn optimally, it'll pump a bunch of extra fuel through the engine to keep it safe. Having too little fuel (aka running lean) can destroy an engine, so the ECU plays it safe and runs rich (too much fuel) instead. The consequences of rich running are relatively minor compared to lean running, but can and do tend to create excessive carbon buildup on the catalytic converter and O2 sensors, as well as fouling spark plugs.

First thing to do though is to swap the wires on your coil packs and see if you end up with a misfire code for the same cylinder #3. If you do, then it's the plug or wire. If it moves, it's the coilpack. Replace whichever part is faulty. You'll probably need oxygen sensors too, before you can clear all the codes.

Posted on Sep 02, 2008

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mrgreenz
  • 962 Answers

SOURCE: Ok I?m getting a p1297 code and then I?ll start

Clean the EGR valve seat. The EGR may have become stuck. A good way to check for vacuum leaks is to use smoke near every intake vacuun hose . And near the intake manifold. The valve will **** in the smoke. If you clean the EGR valve and it still misses. Replace it. The EGR can cause random misfire.

Posted on Jan 06, 2010

Testimonial: "ok ill give that a try i never herd the smoke test before but i like it sounds like it will work"

  • 357 Answers

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.

Posted on Jan 13, 2011

Testimonial: "Great information. Thanks."

rohdd
  • 283 Answers

SOURCE: Hello i have a GTI

I think that PO422 is the Cat Converter, it may be bad or may be just the O2 sensor.
The PO300, 302, 303, 304 code have to do with the ignition coils or wires. (302, 303, 304 means there are ignition /firing problems in cylinders 2, 3and 4). If your lucky just the wire and new spark plugs.
Google "engine codes Jetta" for more on web. Good luck.

Posted on Feb 06, 2011

nicole99wu
  • 1049 Answers

SOURCE: My jetta 2000 vr6 manual

this is an obd2 code trouble table, it can help you understand the meaning of code.
for p0300, you can go here.
for p0303,you can go here.
for p0304,you can go here.
for p0134, you can go here.
for p0341, you can go here.
hope help.

Posted on Jul 21, 2011

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1 Answer

What do the fault codes mean, what repairs are needed? PO300 PO302 PO303


The fault codes refer to misfires, P0300 is a random misfire ,anything from fuel injector problems , vacuum leaks , low fuel pressure ,clogged fuel filter . P0302 is a specific cylinder misfire same for P0303 ! # 2 an #3 cylinders . Spark plugs , plug wires , coils or coil , depending on make model an year vehicle an ignition system type ! Testing is the only way to find out the corrections needed . It takes a very good technician to trouble shoot these problems . Your best bet would be to take your vehicle to a qualified repair shop

Aug 02, 2016 | Cars & Trucks

1 Answer

Trouble shooting 97 Toyota camry


P0300-Random/multiple cylinder(s) - misfire detected
P0302- Cylinder 2 - misfire detected
P0303- Cylinder 3 - misfire detected

Aug 02, 2016 | Toyota Cars & Trucks

1 Answer

99 ACURA CL 3.0 FAILED PO302 MISFIRE PO303, PO304, PO305, PO306, & PO300 RANDOM/MULTIPLE CYLINDER MISFIRE DETECTED


If a tune up (spark plugs, ignition wires, distributor cap/rotor button or coil packs) don't work, try checking the fuel system.

Nov 05, 2013 | Cars & Trucks

1 Answer

2000 Lexus GS300 I have codes po300 po302, po303, po304, po305, po306,po171


We can't help you here

You need the car diagnosed

I doubt you have lifters,should have
OHC valve train

Most likely the oil passages are clogged up
in the cams with sludge

That's what happens when the wrong oil
& too long between changes takes place

You ruin the engine

Dec 23, 2012 | Cars & Trucks

1 Answer

Kia optima-2004-2.4-po300,po302,po303,po320


Ignition failure sensor circuit problem. Either a bad sensor or connection.

Jun 06, 2011 | 2004 Kia Optima

2 Answers

Hello i have a GTI its a 2.0L manual transmission, i have been having problem after problem thus far. Current engine codes PO422, PO300,PO304,PO303,PO302. I do not have a code list to see what these are...


I think that PO422 is the Cat Converter, it may be bad or may be just the O2 sensor.
The PO300, 302, 303, 304 code have to do with the ignition coils or wires. (302, 303, 304 means there are ignition /firing problems in cylinders 2, 3and 4). If your lucky just the wire and new spark plugs.
Google "engine codes Jetta" for more on web. Good luck.

Feb 06, 2011 | Volkswagen GTI Cars & Trucks

2 Answers

Ok I?m getting a p1297 code and then I?ll start getting po301 If I erase the codes then start the car and let it idle ill get the po300 po301 po302 po303 Then drive the car ill get the p1297 If I erase...


Clean the EGR valve seat. The EGR may have become stuck. A good way to check for vacuum leaks is to use smoke near every intake vacuun hose . And near the intake manifold. The valve will **** in the smoke. If you clean the EGR valve and it still misses. Replace it. The EGR can cause random misfire.

Jan 06, 2010 | 2001 Volkswagen Beetle

1 Answer

Reads codes of po300,po302,po303,po305


Hi these are mis-fire codes ,
P0300 is a general mis-fire detected code the others relate to specific cylinders,
P0302 is cylinder 2 misfire
P0303................3........
p0305..................5........
I would check your spark plugs first if Ok you need to make sure the coils are working ok for this you need an osciloscope to check output voltage if your not sure then take to a qualified mechanic with Cadilac experience it could be caused by an air leak,bad ECT sensor or even Mass air flow sensor ,codes only tell you the result not the cause

Jul 24, 2009 | 2003 Cadillac CTS

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