Question about 2002 Volvo S40

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P0420-what does that mean

I have a 2002 Volvo s40. And that code came up and is makin my car fail smog. What is the problem and how do I fix it

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I'm having the same problem did you ever get it fixed?

Posted on Apr 15, 2014

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Catalytic converter efficiency.

Posted on Jun 24, 2009

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Volvo s40 code moteur p0102 inf svp


code p 102 refers to mas air flow (MAF) sensor/ volume (VAF) sensor ---low input===causes --wiring short to ground --MAF/VAF sensor ---ECM
code p 103 refers to MAF/VAF sensor ---high input====causes --wiring short to positive ---MAF/VAF sensor---ECM

Aug 20, 2016 | 2002 Volvo S40

2 Answers

I have two codes come up when checking why my check engine light is on. P0447 and P0420. Any info on what these mean and what it takes to fix so I can pass my smog test??


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Definition of P0420 is catalyst below threshold. This is indicative of (among other things) a converter that is not working as efficiently as it should be (according to specs). Catalytic converters are not normally a "wear" type item, that is they are not deisgned to wear out and need replacement. If they have failed, it is likely due to something else that caused it to fail.

P0447 Evaporative Emission Control System Vent Valve/Solenoid Circuit Open. The Powertrain Control Module (PCM) has detected an open within the circuit that controls the vent valve or solenoid for evaporative emission systems vapor.

Read more at: http://www.obd-codes.com/p0447
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Jan 26, 2016 | Hyundai Motor 2002 Elantra

1 Answer

Fault codes p0420


P0420 indicates Catalytic convertor not efficient. could be rear sensor. Guaranteed fix is to remove the rear sensor and reinstall with a spacer to fool the computer

Jul 18, 2014 | Volvo S40 Cars & Trucks

1 Answer

2005 hyundai elantra engiine code P0420, runs good can not pass smog


P0420 - Catalyst System Efficiency Below Threshold (worn out cat.)
Possible causes- Three way catalyst converter Bank 1
- Exhaust tube
- Intake air leaks
- Fuel injectors may be faulty
- Fuel injector leaks
- Spark plugs may be faulty
- Improper ignition timing
- Engine Control Module (ECM)

Jun 12, 2012 | 2002 Volvo S60

1 Answer

I have volvo s40 2002 and i don't know how put


You turn the disc button I think it is, to get the numbers up you want, then push in to confirm the number you have and then bingo should be on. If you do not have the code give volvo service dept a quick call with your reg and they will fix you up with the code.

Feb 24, 2010 | 2000 Volvo S40

1 Answer

Just tried to get a smog check and problem code p420 came up. Any idea what it could be?


The P420 code is a catalytic converter efficiency code. I would very much suspect that the catalytic converter is bad. They have been failing lately at the flange for the flex pipe.

Jul 14, 2009 | 2001 Volvo S40

2 Answers

What is p0420 on a volovo s40


Catalytic converter efficiency. Replace the catalytic converter.

Jun 24, 2009 | 2002 Volvo S40

1 Answer

Codes p0303/p0420/p0700 what mean that


P0420 Catalyst system below Efficiency Threshold (Bank1)
p0303 Cylinder 3 Misfire Detected
p0700 Transmission Control System Malfunction

Jul 14, 2008 | 2005 Volvo S40

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