Question about 2003 Toyota ECHO

Open Question

I have code poo11 and po420 what do I check

Car runs good but engine light comes on with these 2 codes

Posted by on

Ad

6 Suggested Answers

6ya6ya

6ya staff

  • 2 Answers

SOURCE:

Hi there,
Save hours of searching online or wasting money on unnecessary repairs by talking to a 6YA Expert who can help you resolve this issue over the phone in a minute or two.

Best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.

Here's a link to this great service

Good luck!

Posted on Jan 02, 2017

Ad
c17hydro

Greg Bernett

  • 2989 Answers

SOURCE: 1997 toyota camry check engine light on,code po440,po420,po441,

P0420 is catalyst system efficiency below threshold (bank 1)

P0440 is evaporative emission control system malfunction

P0441 is evaporative emission control system incorrect purge flow

Posted on Mar 29, 2009

Ad

super_guy

  • 1986 Answers

SOURCE: PO420

Not just a faulty catalytic converter will trigger this code. Many other issues can trigger this code.

  • Leaded fuel was used where unleaded was called for
  • An oxygen sensor is not reading (functioning) properly
  • The engine coolant temperature sensor is not working properly
  • Damaged or leaking exhaust manifold / catalytic converter / exhaust pipe
  • Delayed spark timing
  • The oxygen sensors in front and behind the converter are reporting too similar of readings
Possible solutions:
  • Check for exhaust leaks at the manifold, pipes, catalytic converter.
  • Replace Coolant Temperature Sensor
  • Use a scope to diagnose the oxygen sensor operation (Tip: The oxygen sensor in front of the catalytic converter normally has a fluctuating waveform. The waveform of the sensor behind the converter should be more steady).
  • Inspect the downstream heated oxygen sensor (HO2)
  • Replace the catalytic converter
  • Have timing adjusted


Posted on Aug 25, 2009

Anonymous

  • 4 Answers

SOURCE: 2000 corolla with trouble code po420

If the code has cleared on its own then you need to disconnect the battery and re-connect it. This will clear the codes out of the memory. If you don't want to do this you can go to an auto parts strore and have them hook the little computer up to your car and they can clear out the code as well.

Posted on Sep 02, 2009

ftw1952

frank thomas wilson

  • 10319 Answers

SOURCE: my 01 toyota sienna has check engine light on code

If you think the catylist is ok check your 02 sensor instead. P0420 is about the convertor and maybe water got in your tank fron filling it at a fuel stop with low reserves in their tank. They all do have water in their tanks. If you like fill your tank and the disconnect your battery for 15 minutes. reconnect it and drive the car 50 miles or more on the highway. This may clear your codes out

Posted on Jan 23, 2010

Anonymous

  • 1985 Answers

SOURCE: po420 on my 2001 sienna

P0420=Catalyst System Efficiency Below Threshold Bank 1,
The air filter is not the cause here,this is just a code saying your converter is not doing its best,

Posted on Jan 26, 2010

Add Your Answer

Uploading: 0%

my-video-file.mp4

Complete. Click "Add" to insert your video. Add

×

Loading...
Loading...

Related Questions:

1 Answer

I have a 2008 kia spectra engine light stays on took it to auto zone code poo11 one of 4 causes 1.) blocked oil passage 2.) low oil pressure 3.) failed crankcase actuator 4.) michanical timming issue I...


For this code, you have to remove the valve cover and inspect the camshaft timing mechanism. If there is sludge under the valve cover, you need to desludge the whole engine. Remove clean, and inspect the cam timing mechanism for damage. After reassembly, make sure it springs back to the idle position.
the adjuster/solenoid is shown below. It has a valve that the pcm opens and closes rapidly to control the advancing of the camshaft using oil pressure.


a_20161111_1422523151-lxsvs4ftyjtcqsaualeaxmu4-2-0.png

Aug 31, 2017 | Kia Spectra Cars & Trucks

1 Answer

Moisture getting in to coil pack spark plug area


Use silicone grease on the boots.

Aug 31, 2012 | Cars & Trucks

1 Answer

Nissan altima 3.5l v6 2005 poo11


code 11 is camshaft position sensor bank 1 circuit malfunction.

Nov 15, 2011 | Cars & Trucks

5 Answers

Po420 haunting me 03 jetta 1.8t


You're going to have to have the codes read and find out what is setting that light on. After that problem is repaired, the car must indeed complete a drive cycle, not nessacarily 200 miles. This lets the computer run all it's tests and set all its readiness monitors. If you know what the code number is now, post it and I'll tell you the most likely cause, and repair.

Feb 04, 2010 | 1998 Volkswagen Jetta

2 Answers

Po420 on my 2001 sienna


P0420=Catalyst System Efficiency Below Threshold Bank 1,
The air filter is not the cause here,this is just a code saying your converter is not doing its best,

Jan 26, 2010 | 2001 Toyota Sienna

3 Answers

1998 saturn check engine lite comes on gives codepo420&po573


Code po573 is cruise control / brake switch circuit A circuit voltage high PO420 catalyst system below threshold, po573 is probably a bad brake circuit / switch problem, PO420 is a bad catalatic convertor for bank 1

Sep 28, 2009 | 1998 Saturn SC

2 Answers

2000 corolla with trouble code po420


If the code has cleared on its own then you need to disconnect the battery and re-connect it. This will clear the codes out of the memory. If you don't want to do this you can go to an auto parts strore and have them hook the little computer up to your car and they can clear out the code as well.

Sep 02, 2009 | 2002 Toyota Camry

1 Answer

I have a 2000 chrysler concorde that the engine light just popped on - the error codes are po302, po420, po340


P0302-cylinder #2 misfire detected
P0420- catalyst efficiency below threshold bank 1
P0340-No cam signal at PCM.
The Cam sensor most likely needs to be replaced first. Clear the codes after that and drive and see what comes back on.

May 29, 2009 | 2000 Chrysler Concorde

2 Answers

2000 Mazda Miata, check engine light comes on. Code PO420


I HAVE A 2000 MAZDA MIATA AND IT IS BRINGING UP A CODE PO421, CAN YOU TELL ME WHAT THAT IS

Dec 15, 2008 | 2000 Mazda MX-5 Miata

1 Answer

CTS CODE PO420


most of the time its the sensor that cause this,id try replacing the sensor on it,that usually fixes that code,but you have to get the code cleared off with a scanner ,and then re-scan it to make sure it doesn't come up again,good luck with it.

Jun 29, 2008 | 2005 Cadillac CTS

Not finding what you are looking for?
2003 Toyota ECHO Logo

157 people viewed this question

Ask a Question

Usually answered in minutes!

Top Toyota Experts

Marvin
Marvin

Level 3 Expert

85216 Answers

Colin Stickland
Colin Stickland

Level 3 Expert

22485 Answers

Jonah Oneal

Level 3 Expert

14092 Answers

Are you a Toyota Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides

Loading...