we just picked up a 2000 passat wagon and we were out driving it around and the CEL came on, looked up the codes and it came back with P0421. it still runs great. I am just woundering what the problem is. 2.8 v6 with 159,000 mile's.
View 3 RepliesSo the code reads "warm up catalytic converter efficiency below threshold (bank1)" ?? What it could be?
View 12 RepliesWhat this code may mean and what type of expense will I be looking at? Is it something I could fix or does a dealer need to perform this repair?
View 4 RepliesI have sel code of P0421. What are the odds of the downstream sensor being bad vs a bad catalyst converter? The car runs great and I get 19+ mpg in town driving. It is a 2001 Mazda Protege, 2.0L V4 .....
View 15 RepliesLast year I posted my CEL problem of P0421 and replaced both upstream and downstream sensors. I passed smog because I was allowed one error message and that message was Cat not ready. I had cleared the CEL light and drove long enough before inspection to reset all but the Cat not ready message and no CEL.
Last Friday I had to clean my throttle body butterfly valve and interior housing and I also had to replace the air inlet hose that connects the air cleaner/MAF sensor to the throttle body because the hose had some splits allowing air in. I disconnected the battery before doing any work.
My new question: Could air entering freely through the splits in the inlet hose, thus bypassing the MAF sensor, and being delivered directly to the throttle body, cause an error message of P0421?
My car's an 04 Mitsubishi Lancer ES, 4-cyl, 2.0L. So long story short, my check-engine light has been coming up every now and again for the last couple months with the code P0421, which a shop has confirmed I need a new manifold catalytic converter for (they ruled out any problems with O2 sensors).
View 2 RepliesI just bought a 2002 2.8L Passat 4Motion. On the way home, the check engine light came on. My friend lent me his generic brand diag tool to scan that check engine light. It came up with two codes. The first one was:
P0421
Warm Up Catalyst Efficiency Below Threshold (Bank 1)
The second code was:
P0431
Warm Up Catalyst Efficiency Below Threshold (Bank 2)
What this means or what I need to do to fix it? Is it a matter of cleaning something or replacing something? If it's something I can figure out, I'll do it on my own. Mistakenly, I erased the code and now the light is gone--thought I was deleting the code from the handheld unit. I can't open my hood.
I just bought a 2000 VW passat with 63k. I had it for a week and check engine light came on. 30 v engine ....
p0431 /16815 bank 1 below threshold??
p0421/16805 bank 2 below threshold??
Cat? or 02 sensors???
2003 passat wagon 2.8l v6 with p0421 and p0431...a slight miss as well...
Cold start up is fine and initial driving. After car warms, there is a slight shutter at idle (just occasionally) and upon acceleration with low rpms. (It really feels like a miss) Went to AutoZone and came back with the codes above. I thought it might need a new coil but now I am not really sure. I want my performance back but seriously doubt cats are bad at the same time.
My 2000 Hyundai Accent Hatchback (manual) is tripping the code P0422 (Main Catalyst Efficiency Below Threshold (Bank 1)). If i clear the code it will pop back up after about 40-60 miles of driving. I hooked my OBDII sensor to it and look at the voltage output from the two O2 sensors and the front one oscillates between .2 to .7V and the downstream one does as well switching about at the rate. From my understanding the downstream O2 sensor should stay fairly steady or at least switch much slower than the upstream one. I get pretty good gas mileage, typ. ~30mpg. Luckily my state does not have emission testing. Is it actually the catalytic converter, the downstream O2 sensor or something else?
View 10 Replies2000 F-150 Triton V-8, Super Cab, 2WD, ~170,000 miles, 4-wheel ABS (one speed sensor on each front wheel and one on the rear differential). The ABS light comes on a few minutes after driving. It seems to take a little bit longer for the light to come on when the weather is colder.
I used a Cen-Tech 60794 OBD II/CAN with ABS scan tool with key on, engine off, and the below sequence. No codes were detected. I then left the scanner connected but powered off and drove around until the ABS light came on. Pulled into a parking lot with engine running, powered up the scan tool and went through the following menu choices:
Diagnostics
ABS
Area - USA vehicles
Model - Ford
Although the tool's instruction manual has several more items that may or may not be required (VIN digits, model year, etc), the next thing I saw is a message indicating the scanner is linking with the vehicle computer. During that time the ABS light went out. Next on the scan tool display my choice was to read codes or erase codes. I selected "Read codes" and the display said there are no codes in the module.
Check engine light is on... Then about 2 mins into driving Emissions Workshop comes across the dash.. i Ran the code it says
P1176 Oxygen sensor correction limit attained (bank 1)
What exactly does that mean in other words. also what is bank 1? im not sure what oxygen sensor it is out of the 4 of them.
i have a 2000 30v 4motion.
I've got a 2000 passat v6 and lately it started running pretty poorly. Now it takes a good 15-20 minutes just to get it started and idles very low and dies until after awhile it will run fine. I plugged in an obdII scanner and got the codes p1131, p1423, and p1411. I am pretty sure the last 2 codes are just emissions codes I've had ever since i bought the car. I haven't been able to find a solid answer on what this code is. I imagine it has to be something along the lines of a mass airflow sensor or o2 sensor. I'd rather not go throwing all that money at my car if I don't have to yet.
View 2 RepliesI have a 00 1.8t that won't start...
It gives me P1517 fault code and is the only code I'm getting. Replaced starter. I've looked all over and find very little information about this. Some place I read about said relay 377 is the main electrical relay but I can't find where it is.
Is there a missing relay next to 370?
So I was driving for 6 hours yesterday and about 3 hours in my boost completely cut out on the highway. I didn't get any CEL or EPC light or anything. I took a look under the hood and everything looks okay. I also thought maybe the turbo blew but it isn't smoking or anything. What it could be?? Or some way I can diagnose the problem?? I have a 6 hour drive back home and would like some boost! It is a 2000 Passat 1.8T ....
View 5 RepliesI have a 2000 1.8L that's great. I have seen a reference to Vacuum leak diagnosis. I have a check engine light on and it has been for a while. the car still runs well and gets fine gas mileage. Coed is 1136. Is there a specific hose I should check?
View 7 RepliesIssue on 2000 Passat where the auto door locks lock when you start to drive, then out of the blue, one or more will pop back up. Sometimes one will just pop back up at the next stop sign when stopping, then go back down again when starting.
View 3 RepliesI have a 2000 passat. I recently acquired the car and the previous owner installed a cone filter. While driving the filter got chewed up into the wheel well and breaking. The car was running Decent without a Mass air flow but would run rich and sputter obviously. I parked the car at my cousins and decided it would make it home without the sensor the next day.
I proceeded to drive the car home. On the way home the car shut off on the 2nd lane - I was able to get off with the metro courtesy towing. The car has not started since. I checked the following
- Timing belt - Still intact and does not look damaged
- Fuel - I removed the feeder hose from the fuel rail and turn the key and got a huge squirt so fuel is good
- Checked for spark - Pulled out a spark plug and placed it on my coil and grounded the plug on valve cover - NO SPARK WHATSOEVER
- I checked the number 1 wire on the coil for power.
- I used a test light for this (no Ohm meter )
Placed test light on number 1 pin and got a light that dimmed immediately ( seems weak? i would assume it would be high output for the spark plug .
I also tried to find the motronic Power supply Relay. I looked in the box where the ECU is located on the driver side and found 2 relays next to the ecu, a black one , and a grey one ( which one is the power supply replay?)
But the only things that can cause my problem are
-Cam Position sensor
-Power supply relay
-ECU
-Crank Sensor
2000 Passat GLS V6 Manual Transmission 102k miles
I was stopped at a light tonight making a left hand turn, I had the car in 1st gear and the my foot on the clutch. I slowly released the clutch and proceeded to make my left hand turn, halfway thru the turn the car made a noise that sounded like a pop (almost as if something came apart underneath the front end of the car and was loose) and then my manual transmission went into neutral. I slowly coasted to the side of the road and had the vehicle towed.
After I had coasted to the side, I tried putting the car into gear and the engine would rev up but the vehicle would not go forward or reverse. I tried all 5 gears and reverse. While sitting there the car would beep and the screen would say "hand brake on" and if I put the car into first this message would go off. The message only came on about 2 times in 5 minutes and never stayed on.
2000 passat GLX, tip, 2.8L v6... new brake pads and freshly turned rotors, but both the "ABS" light and the "BRAKE" lights come on intermittently whilst driving. It doesn't happen every time it's driven, just maybe 1/3-1/2 of the time, and it is only on for a bit before it turns off, but it will usually turn on again later for a short stint as well.
View 3 RepliesFriend of mine has a 2000 Passat. He has a weird problem. The car will just shut off in the middle of driving and won't start for 1-2 hours.. the ECU was already replaced, along with some sensors.
View 3 Replies