Question about Toyota Yaris

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2007 Toyota Yaris Sedan check engine light error code P2420

Check engine light came on on my 2007 Toyota Yaris Error code P2420 what does it mean? We just completed a 1550 mile road trip to Virginia. Car is running good. It has less than 57,000 miles. I have regular maintenance done on it. Oil changes, air & pollen filters, tire rotation & wheel balances

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  • Toyota Master
  • 20,706 Answers

Rule 1, P2 means private Toyota code DCT.
where did you see this. on the dash, at autozoned. or where?
where, counts.
2420 means EVAP failure.
bar stool, the gas tank vents are SNAFU'd or FUBAR.
they leak. that is the purpose of evap is to stop fuel fumes from leaking to our fresh air.
and runs test full time. to make that happen.
if it fails the car will not explode or do something dangerous.
i never use forums to find truth here, as most are full of rumor and bull.
i use real Toyota data (the FSM)
data;
Vent valve stuck open (vent)
Following condition met during key-off EVAP monitor:

  • EVAP pressure change when vent valve closed (ON) less than 0.3 kPa-g (2.25 mmHg-g)
that is metric, pressure, convert as you see fit.

  • Canister pump module (Reference orifice, leak detection pump, vent valve)
  • Connector/wire harness (Canister pump module - ECM)
  • ECM
While ignition switch OFF

the PCM toggles the vent valve. and expects a .3kPa change.

id say tighten the gas cap, and reset the eCU, with any scan tool.

see if it comes back, costs zero, effort 5min.
then if it comes back check cap for damage or replace it.
if that dont fix it you will need to test the system.
the FSM covers all that. doing leak down tests, etc.
do you want to do that?
yes, then log in to alldata.com and read.

Posted on Feb 12, 2014

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Drive safe =]

Sean

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