Hi,
Have you checked fuel pressure to determine if there is an issue with the regulator? I do see the rich mixture, and the --30 on the trims, so the computer is trying to compensate by leaning the mixture. If you haven't, start there. See if pressure is too high due to a regulator issue, or when you turn the key off if pressure drops off really fast indicating an injector issue. Here is a link you may find helpful.
As far as the P420, that is usually the result of a faulty catalytic converter. Note it is bank one which is running the richest.
As far as the ABS, first, check fuse 18 in the under-hood fuse box. See pic 1 below.
In addition to checking the fuse, confirm there is power to and from it. Here is a link you may find helpful:
https://www.2carpros.com/articles/how-to-check-a-car-fuse
If the fuse is good and has power to and from it, next do the following:
1) Disconnect the ABS modulator-control unit 25P connector.
2) Measure the voltage between the ABS modulator-control unit 25P connector terminal No. 8 and body ground. (See pic 2 below)
3) If there is battery voltage at pin 8 (12v), Check for loose terminals in the ABS modulator-control unit 25P connector. If connections are OK, replace the ABS modulator-control unit.
4) If there is no power at pin 8, there is an open in the wire between the No. 18 (20 A) fuse in the under-hood fuse/relay box and the ABS modulator-control unit.
Here is a link you may find helpful when checking wiring:
https://www.2carpros.com/articles/how-to-check-wiring
Let me know what you find or if you have other questions.
Take care,
Joe
See pics below.
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Sunday, November 21st, 2021 AT 7:28 PM
