2001 Tundra starting noise

Tiny
CJUSTICE1
  • MEMBER
  • 2001 TOYOTA TUNDRA
  • V8
  • 4WD
  • AUTOMATIC
  • 133,333 MILES
2001 Tundra with 133k miles just started making a rattle/diesl noise when starting on cold mornings. I use 5W30 oil and a Toyota filter. When using 87 octane gas the check engine light comes on, but when I switch to 93 it goes off. The noise is still there with 93 octane too. When the light is on the code is P430? Is the converter bad, is this causing the noise?
Do you
have the same problem?
Yes
No
Sunday, January 23rd, 2011 AT 3:14 AM

1 Reply

Tiny
BLUELIGHTNIN6
  • EXPERT
P0430 OBD-II Trouble Code
Technical Description

Catalyst System Efficiency Below Threshold (Bank 2)
What does that mean?

Basically this means that the oxygen sensor downstream of the catalytic converter on bank 2 is detecting that the converter is not working as efficiently as it should be (according to specs). It is part of the vehicle emissions system.
Symptoms

You will likely not notice any drivability problems, although there may be symptoms such as a rough/hard idle when cold.
Causes

A code P0430 may mean that one or more of the following has happened:

* The catalytic converter is no longer functioning properly
* An oxygen sensor is not reading (functioning) properly
* There is an exhaust leak

Possible Solutions

First, inspect for exhaust leaks.

Next step is to measure the voltage at the oxygen sensor on Bank 2. In fact, it would be a good idea to test each oxygen O2 sensor while you're at it.

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. Many manufacturers give a five year, unlimited mileage warranty on these items. It's worth checking into.
Was this
answer
helpful?
Yes
No
Wednesday, February 2nd, 2011 AT 4:07 AM

Please login or register to post a reply.

Recommended Guides