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Re: Egr and Catalyst not ready 1996 toyota tacoma 2.4L M
Posted to Emissions Forum on 3/29/2016 15 Replies

The EGR vacuum solenoids fail very intermittently, I would closely observe the solenoid or replace. An aged downstream O2 sensor will inhibit the CAT monitor. What is the downstream O2 sensor voltage at idle & 2000RPM? Login to read more.

15 Replies Received (View Replies)