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2004 Nissan Pathfinder shows p0430 and p0420. if clearing code and drive in temperature under -15 celsius no code coming up. if outside temperature is above -15 codes are coming back

Why I don't have codes if driving under -15 outside temperature

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6 Suggested Answers

6ya6ya
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Posted on Jan 02, 2017

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raygin
  • 322 Answers

SOURCE: Jaguar S Type 3.0 SE Fault code P0430

Code PO430 could be = catalyst efficiency below threshold bank 2 ........ this may be caused by faults in combustion and if you have just completed repairs it may rectify itself as the car runs correctly ...... do not leave as a fault for too long as damage will occur to cat/conv.

Posted on Apr 07, 2009

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SOURCE: P0420 & P0430 codes 99 silverado

codes p0420 and p0430 are both post o2 sensors, the ones after the convertor, both sides if replacing

Posted on May 18, 2009

bschilz
  • 2049 Answers

SOURCE: check engine light-on OBD code's P0420 &

The codes are Catalyst System Efficiency Below Threshold (Bank 1)&(Bank 2).

The catalytic converter has an oxygen sensor in front and behind it. When the vehicle is warm and running in closed loop mode, the upstream oxygen sensor waveform reading should fluctuate. The downstream O2 sensor reading should be fairly steady. Typically the P0420 code triggers the Check Engine light if the readings of the two sensors are similar. This is indicative of (among other things) a converter that is not working as efficiently as it should be (according to specs). It is part of the vehicle emissions system.

A code P0420 may mean that one or more of the following has happened:

  • 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
  • Retarded spark timing
  • The oxygen sensors in front and behind the converter are reporting too similar of readings
Some suggested steps for troubleshooting a P0420 code include:
  • Check for exhaust leaks at the manifold, pipes, catalytic converter. Repair as required.
  • 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 if necessary
  • Replace the catalytic converter
One thing to note is that many vehicle manufacturers offer a longer warranty on emissions-related parts. So if you have a newer car but it's out of it's bumper-to-bumper warranty, there still may be warranty on this type of problem.

Posted on Oct 06, 2009

  • 1 Answer

SOURCE: Ck. Engine P0420 & P0430

engine code p0430 for 2005 toyota sienna

Posted on Dec 30, 2009

TDISLine
  • 1874 Answers

SOURCE: Getting OBD codes p0420 and

2001 Audi A6
EOBD code: P0420
Fault location: Catalytic converter system, bank 1 - efficiency below threshold
Probable cause: Catalytic converter, wiring, heated oxygen sensor 2 (downstream)

EOBD code: P0430
Fault location: Catalytic converter system, bank 2 - efficiency below threshold
Probable cause: Catalytic converter, wiring, heated oxygen sensor 2 (downstream)

Posted on Sep 15, 2010

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P0420 & P0430 are catayltic coverter codes ! P0440 Evaporative Emission Control System Malfunction P0700 Transmission Control System Malfunction
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http://www.obd-codes.com/p0420 http://www.obd-codes.com/p0430 http://www.obd-codes.com/p0440 Sounds to me like you have some major problems and need to take your vehicle to a qualified repair shop .

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Definition of Diagnostic Trouble Code P0430 Category: Powertrain Definition: Catalyst System Efficiency Below Threshold Bank 2Note: This definition of P0430 is applied to all manufacturers

As the code description implies the P0430 code means that the vehicle's control module has detected that the three-way catalytic converter is not working properly (is not as efficient as the factory is expecting). Replacing the oxygen (O2) sensors may sometimes fix the code, but in most cases the catalytic convert needs to be replaced to fix the problem. If the P0430 code is combined with other codes, try fixing the other codes first.

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ok lets do this in order
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