Passat (B5) :: 2002 - Cat Warm Up Threshold Low Code / O2 Sensor
Jun 15, 2010
I have a 2002 GLX Wagon 2.8 30v, and was getting Cat warm up threshold low code, on the driver side due to the cat being bad. As a temp fix I decided to use spark plug haulers to gap the sensor. When I removed the O2 sensor I wiped the dirt off with a paper towel, which was clean and dry. I put the sensor back on, but now I am getting 4 codes which won't go away. p0036 p0056 p0141 p0161. These are O2 heater circuit codes both bank 1 and 2. I did not touch bank 2 so I don't know how I could have caused this error. I tried to take off bank 2 sensor but it is really stuck on there.
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So the code reads "warm up catalytic converter efficiency below threshold (bank1)" ?? What it could be?
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It says warm up catalyst below threshold (bank 2). Is this just an o2? and is it upstream or downstream if it is? When I scan other cars at work it normally says system is too lean/rich for o2's.
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So a letter history about the car and this car is a friends car. They owned the car and drove without changing the timing belt when the car hit 109k. So the timing belt snapped and they went out and bought a timing belt and also the timing belt kit with the pulleys and all. They installed it.. didnt turn over or what so ever.
They towed the car to us which we own an auto repair shop. We knew the valves was bent and so we tore off the heads send them off to have them put new valves and etc etc.. We put the car back together for them and now the car runs fine. They pick it up and about a few days later they brought it back due to a check engine. It threw the code:
16711 - Knock sensor 1-G61 Signal too low. (p0327)
now we replaced both knock sensors and when they came and got the car... the check engine light came back one showing the same code. We cleared it out and the next day it came back on showing the same code Again! So now we don't have a clue why that code keeps coming up because we replaced both sensors with a new one. Any clue why the code keeps popping back up?
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Got the CEL Bank 1 Sensor 2 heater circuit fault. Is that the rear right post-cat oxygen sensor? What is correct part number or possibly a link? 2002 2.8l Passat V6...
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Ok had a check engine light. It directed me to replace the IAT sensor.. After some research I found it was integrated into the MAP sensor. Purchased a new sensor and replaced. Drive about 15 miles CEL throws another code. P0106 (sensor i just replaced) faulty Map sensor.
Followed procedure to replace sensor.. unhook battery cable reset ecm. After reset engine is hard to start. Followed by RPM changes (assuming its the ECM re-adjusting). Then CEL flashes 5-6 times and goes out, Drive 15 miles. Map sensor code reappears. (note i only purchased one sensor But repeated install 2 times).
My thought is against wiring. since the codes refer to different signal wires one for IAT one for MAP sensor. Faulty replacement sensor?
2002 Accent 1.6L
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Car is throwing Converter below threshold code. I figured i would put in MagnaFlow High-Flow cat from my work but didnt know if that would work. The position of the stock 02 sensor is what baffles me.
It seems to me the factory design has the 02 sensor in between 2 chambers. Could I just install this Magnaflow cat and put the 02 sensor after the cat? Can get rid of this code after installing high-flow cat?
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Recently I pulled code P0420, AKA Bank 1: Efficiency Below Threshold.
To start from the beginning...several weeks ago my EPC light came on so, like most educated consumers I decided to buy a vag-com. I pulled the codes and got both the Bank 1 and Bank 2 efficiency below threshold codes (p0420, p0430). I reset the light and literally within 3 minutes the EPC light came back on only this time just Bank 1.
So I drove around again for a week and the check engine light came on this time, back to Bank 1 and Bank 2. Whether trying to replace the spark plugs will possibly fix the misfires, its Cat Converter replacement or possibly just replacement of 02 sensors. I have been reading mixed responses.
FYI I use synthetic oil and chance the oil every 7500-9000 miles, have 89,000 miles and have never changed my spark plugs.
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I was app. 10 miles from home & engine started missing & went into limp mode & yes the light flashed . I limped it home anyway & now have a PO430 code . # 2 spark plug died & caused this , danged plug didn't have a hundred miles on it since new . Replaced that plug & everything's fine except that code . Vehicle runs great . I've also read an 02 sensor could cause this code .
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I checked out a 2006 Prius yesterday a guy is selling. It had the CEL on (not sure why somebody would try and sell a car with that, but anyway). He said that it's because they get gas at a station that consistently doesn't tighten the gas cap enough but by the time the tank is down to 1-2 bars the light always goes away. Although I don't doubt his story, I absolutely doubted the cause. So I took it to get the code pulled and it was P0420, which is catalytic converter threshold below efficiency.
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Has around 173,000 miles, with a fresh cat installed a couple hundred miles ago. I was getting this code before, that is why I had a new cat installed. The code finally came back, and just recently I had to replace the crankshaft position sensor. After the sensor change, it was running great. The CEL came back on during a rainy day, I cleared it and was good for a few days. Then it rained again, and it came back. I couldn't afford a new OEM cat, I grabbed the best rated one I could from Amazon and had a shop install it. I know non OEM can be an issue, but I hope it is just an O2 sensor going bad.
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I have a 2006 Subaru Forester with 95,000 miles on it. Earlier today the CEL (solid) and cruise (flashing) came on while I was driving. I believe it may have occurred as I was accelerating up hill. I filled up yesterday, so I tightened the gas cap when I stopped. On my way home, I stopped by my mechanic and they read the code; P0420 Catalyst Efficiency Below Threshold Bank was the code that was read. They reset the code for me but told me that the catalytic converter is what needs to be replaced.
My question: Could the light coming on be incidental (i.e., is it possible that it was a "blip" and my catalytic converter is okay?)? My mechanic said he thinks it is, and that my car should last me quite a bit longer. I am asking because I've put in a bit of money into the car of late and I'm wondering if I should just jump ship. I should say that the majority of the repairs are maintenance (e.g., brakes, tires).
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On my 2002 (AVH) 2.0L 4cyl Jetta I have a persistent P0420 error code: "Catalyst System Efficiency Below Threshold"
I changed the oil, cleaned the Mass Airflow Sensor, replaced the coolant, thermostat, and coolant temperature sensor. But it's still showing up.
OBDII says it could still be:
A damaged or failed oxygen sensor (HO2S)
Downstream oxygen sensor (HO2S) wiring damaged or connected improperly
Damaged or leaking exhaust manifold / catalytic converter / muffler / exhaust pipe
Retarded spark timing
The oxygen sensors in front and behind the converter are reporting too similar of readings
Leaking fuel injector or high fuel pressure
Cylinder misfire Oil contamination
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What a strange problem. EVERY EVERY morning the car starts perfect. Once it is warm some of the time (half) it will give a long crank approx 2.5 seconds before it will start. What a stupid problem! I have replaced:
Spark Plugs (NGK G-power) cheaper than stock, supposed to be better.
timing belt, water pump, idler-just matenence
Cam sensors
crank sensor (on tranny)
I checked the wires and coil by hosing them down while running. Vag-com says the temperature sensor is correct. No trouble codes except Secondary Air... What to do
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I have a 99 Tiburon 2.0 DOHC that I cant seem to get through emissions. The code, p0422 main catalyst efficiency below threshold bank 1 keeps popping up even after replacing the cat converter (twice) and replacing both 02 sensors. What else could be triggering this code and how to fix it?
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My 1999 Camry with 169700 miles has this 'check engine light' code: "Catalyst system efficiency below threshold". We have a mechanic we trust so we'll bring it to him this week. We spent a couple thousand fixing this car about two years ago and I'm not sure it is worth doing that again. Carmax offered us 1200 for it around this time 2012.
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Book says "catalyst system efficiency below threshold (Bank 1)".. Is it just based on mileage or an actual bad O2 sensor or other bad system component?
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I just got this car it a 2002 jetta glx vr6 12v 5 spleed. It has a miss new plugs wires gas and used coil pack. It misses especially when cold check engine light on says cam sensor changed it and still same thing if I clear the code it comes right back.
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So my 02 Camry V6 has the check engine light on. I had them scan at AutoZone. the codes that came up were P1130 and P1135. After reading some threads here, seems like it's the A/F sensor?
Just to confirm, there are two A/F sensors in the V6 model? I can see the front one easily but not the rear one. Need to identify which sensor needs replacement?
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I recently took my car to the Hyundai dealer who told me that my engine light was from a bad cam sensor (Fault Code = P0340). I bought the sensor from the Hyundai parts dealer and replaced it myself. After having the code erased, the check engine light comes back on (with the same code) when I turn the car off and turn it back on, after driving it for a while (30 minutes or more).
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My 02 Explorer (XLT, 4.0) decided to throw a new code today. PO136, O2 Sensor Circuit (Bank 1 Sensor 2).
While it may be a wire issue, I still plan to replace the sensor. So the question is;
Can I get to it from under the vehicle or is there an access panel under the console like on the 2nd gens?
I have the sensor on order and plan to get it done on my days off next week.
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