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SolaraGuy.com • View topic - PO446 and PO135

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Stock talk about the Generation 1 and 1.5 Toyota Solara which were produced from 1999 to 2003.
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PO446 and PO135

Re: PO446 and PO135

Postby Jason.MZW20 » Wed May 19, 2010 8:48 pm

The 1MZ uses a constant vacuum type EGR system (i.e. no vacuum modulator) so it uses an EGR temperature sensor and valve position sensor to determine flow rate.

A P1411 code indicates the EGR valve position sensor isn't responding as quickly as the ECU would like. It's a range/performance code. Sounds like you need a new valve position sensor.

This should also fix the P0402 code as well, so long as the temperature sensor is working within specifications as well.
Jason.MZW20
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