While on business travel, my wife's 2003 1.8T Passat wagon had the MIL illuminate. I had her pull the OBD2 code while I was away, and it came up with P0420. I have been reading up on it, but I have found much in the way of troubleshooting this code. I don't want to just start randomly replacing parts until the light goes away. When I get back I am going to look for exhaust leaks, but barring those what else can be looked for.
View 5 Replies I've recently started popping up a random P2181 performance malfunction in cooling system.
It's so random and shows no signs of any other problems that I'm confused. Temp gets hot, stays exactly where it should be, 200. Never gets a tick hotter, or even close to above 200. Air works, heat works fine. No loss of power. It only seems to come on when I really put my foot down.
My mother has the code to the radio, but when she was entering it she did it wrong. It now says "2 SAFE" or something similar and won't allow any other info entry. We even disconnected the power again and it still says the same thing. How do yo uget it baack to the point of allowing the 4 digit code to be entered?
View 2 RepliesI have a 2003 B5.5 Passat and the Malfunction Indicator Light went off. I went to Autozone for a diagnostic and received the error code:
PO243- Turbo/Sup Wastegate solenoid A malfunction
I did a search but was unable to find out what this is.
This code came up on my car, what it means or what part needs to be replaced.
008577 - Performance Malfunction in Cooling System
P2181 - 008 - Implausible Signal - MIL ON
Freeze Frame:
Fault Status: 11101000
Fault Priority: 0
Fault Frequency: 2
Mileage: 84971 km
[Code] .....
I'm an Mk3 guy but I've gotten the hang of these beasts when I started to fix my brother's '99 B5 AEB. I got a VCDS scan from a friend and got this.
5 Faults Found:
18010 - Power Supply Terminal 30: Voltage too Low
P1602 - 35-10 - - - Intermittent
17953 - Throttle Valve Controller: Malfunction
P1545 - 35-00 - -
17953 - Throttle Valve Controller: Malfunction
P1545 - 35-10 - - - Intermittent
17952 - Angle Sensor 1 for Throttle Actuator (G187): Signal too Large
P1544 - 35-10 - - - Intermittent
16507 - Throttle Position Sensor (G69): Signal too High
P0123 - 35-10 - - - Intermittent
Readiness: 0110 0101
I'm thinking either the throttle body is toast or maybe the ECU.
I am getting to check engine codes and I can't figure out what is causing them, one is P1296 cooling system malfunction, the other is P1654 Check DTC Memory of control panel ECU, any clues as to why I'm getting these, I did have a bad thermostat i changed that and it's still on, I also used the new prestone antifreeze for all makes and models, cause I am about 200 miles away from a dealership for g12.
View 6 RepliesI was just driving and suddenly i had my CEL pop on. I went to pepboys to have them read the code for me and it Came up P 0420. I have been looking up the code and got a few emissions issues but not sure what one to do first. Any link with Main issues for CEL Codes? Or know what it could be?
View 2 RepliesI have a 2007 Prius/70,000 miles and live in NY. The Malfunction Indicator Lamp (Check Engine Light) came on back in May when I was visiting Texas and I stopped to have the code read and got a P0420 code - possible emission problem. As I was far from home I took a day to think about what I should do and by the next evening the light had shut off. Driving back to NY the following week the light came on again about 150 miles from home. Once again within a few days it had shut off. End of June I had the same thing happen - this time I took it to a Auto Part store and had them read the codes again. The guy there told me the only thing that showed up was some kind of emission error. Again within a few days the light went off. Just yesterday (August now) the light came on again. I've resisted taking it to the dealer because I know they will charge me $100+ just to plug it in and tell me what I partly already know. I've been reading up the P0420 code online however still have a few questions.
A. Is it normal for this code to go on and off repeatedly without me really doing anything?
B. Is there any way to figure out what the specific issue is without taking it to Toyota?
C. If it is the catalytic converter would I be covered under the Federal Emission Warranty? - which from what I've read is 8 years/80,000 miles?
The following is what the initial code printout read:
Troubleshooting P0420
OEM Brand: Domestic
Definition
Catalyst efficiency low-bank 1
Explanation
The oxygen sensors monitor the Catalytic Converters ability to store oxygen.
Probable cause
1. Catalytic converter defective (failure possibly due to # 2, 3, or 4)
2. Engine misfire or running condition
3. large vacuum leak
4. Engine oil leakage into exhaust-valve guide seals, piston rings
I have the CBFA motor, and i am getting getting the p0420 error code. I have read two related threads here and here about p0420 codes and different downpipes. It seems the AWE and Nuespeed seem to be better for getting around CEL without additional flashes. I currently have purchased and installed one RAI straight O2 spacer (after the cat) and have tried both the medium and smallest insert but after clearing the CEL it has returned both times with the same code. Do i need two O2 spacers, one installed with the smallest insert and another with a different size? Trying to make sense of all the posts.
I am unitronic stage 1, before going stage two i want to have the CEL under control so i can downgrade the flash and not trip CEL for smog.
I have Unitronics Stage 2, and a 3" downpipe... I keep getting a CEL P0420. I know its about the second o2 sensor, but I don't understand why I am getting the CEL with my chip? Could it be possible that when I put the downpipe back in i reversed the 2 sensors? Or are they the same...
View 5 Replies2006 Toyota Camry LE (4 cyl) with 149,500 miles. All maintenance up to date.
Over the past month, anytime I drive over 80 mph within 15 minutes, the CEL comes on with the code P0420. I read the code and erase it. The funny thing is typically I'm getting very good gas mileage during that tankful when the CEL comes on. I've read that it is likely the downstream oxygen sensor and I plan to replace it. (In February, I replaced the air/fuel sensor). My two questions are:
a) What is the part number for the oxygen sensor (non-California emissions)? I want to make sure I get the right part.
b) Why the CEL comes on after travel over 80 mph? Is this coincidence or is there a reason why this happens?
Keep getting the P0420 code on this vehicle. Have changed air filter, spark plugs, run fuel injector cleaner through the tank on Shell 93 octane fuel. Drove 430 highway miles to clean out the carbon and the SES light is still on and when we check the code it says Catalyst system effiency below threshold bank 1. How do i get this fixed?
View 1 RepliesMy Toyota Tacoma is reporting (via an affordable OBD-II scanner) the same P0420 code: First as a regular code, then as a pending code. What could that mean?
View 6 RepliesI've had both the engine and DSG flash from UM for over a year. The other day I got a cel and a p0420 code. I still have stock dp and oem cats (only Borla cat back). I know the cats are still under warranty (8years 80,000mile). My question is if I bring the car to the dealership for cat warranty will they be able to detect the um flash and use it against me to fix the cat problem?
View 6 RepliesSo I recently (within the last month) replaced my DV for a Forge 007 and my stock air box for an EVOMS v-flow. My cel came on after the DV switch and was throwing the P0420 code at me. Then I swapped the intake and it has been good but I felt like I was running a bit rich and pulled my codes and it now has P0030 in addition to P0420. Why this is? I have 88K miles. Spoke to a mechanic and he says he thinks it is my cat dying. I'm a bit confused since I have a turbo back exhaust.
View 6 RepliesDoes this mean the DPF is shot? I believe its integral with the cat. whats worth checking first?
View 2 RepliesI keep getting the error code P0420. Cat below threshold.
I have replace both the front and rear O2 sensors and we reset the check engine light. While driving through the cycles to reset the sensors for them to be ready for DEQ, the check engine light came on again.
I am about ready to buy the Cat Converter, but it is really expensive and if there are any other things that I can try before replacing the Cat I would like to try that first. Any other issues associated with that code, or should I just replace the Cat Converter as my next step.
Just picked up a 2005 with 146k and full Toyota service history, although seems a steering recall was not done. Will run it to the dealer today to check. I need to decide a.s.a.p. if I am keeping the car or not (I know the seller, he will take it back)
Anyway to cut a long story short, two questions.
1) Car had P3190 and P0420 when I got it. Seller reset, drove home and within 5 minutes on the road the CEL was back on. Checked the codes at home and see only a P0420. Much to worry about? Seems this might be big (Cat) or small (O2). Car getting great mileage - 60mpg at 60mph and it seems to be running great. Should I worry or forget about it? Note I am in Florida with no inspections.
We bought a used 2001 Grand Am (V6 automatic) a few months ago. Mileage was just under 100,000. It was running decently at first, but that improved once we did more maintenance. It's gone from about 150 miles on the highway on a full tank to about 250. A lot of the problems didn't reveal themselves until we took it onto the highways. These are the parts we changed in the last 2 months:
-new battery (old one was 0.1 above fail)-all 6 spark plugs-catalytic converter-front oxygen sensor-oil filter-timing belt-pcv valve and breather hose (old one melted)-all 4 shocks/struts
Latest problem is OBD code P0301 cylinder #1 misfire. The entire car started to shake when we were in low speed in a drive thru. It only seems to shake in drive gear and it does it the whole time. It doesn't shake in reverse or any other gear. Found out #1 spark plug was cracked and a chunk of the ceramic portion was missing. It got replaced but that didn't fix the problem. Haven't noticed any white exhaust yet. The ignition fails 1/7 of the time since P0301surfaced.
The last problem we had was P0420. We went to 3 different shops and nobody was able to fix the problem properly. It wasn't until the pcv valve and breather hose were replaced that the code disappeared. The valve was actually cracked and parts of the breather hose were melted. I can't understand why nobody noticed that.
I know there could be a lot going on, but I was hoping the possible problem could be narrowed down.
So i've had this volvo for about 6 months now.I knew when I purchased it that the two codes being thrown were p0128-Engine coolant temperature, and p0420- Cat efficiency Bank 1.Inspecting mechanic said it needed a new cat to clear the p0420....I went ahead replaced the thermostat and changed the coolant to "fix" the p0128, and cleared the codes, I think the jiffy lube state inspector did not notice the that the catalytic converter test was Incomplete when he passed it. Lucky me I guess.
But now I know that I'll probably have to fix before it gets inspected again. Eventually the p0128 came back on, so I went and got a new ECT sensor. Still doesn't clear the p0128. What am i missing? Coolant temperature sits at a 3'oclock position pretty regularly and quickly. Where to start on the p0420 besides understanding its the Pre-cat o2 sensor that is throwing the code, is there anyway that these are related?