I recently performed quite a bit of maintenance on the green FJ80 (Dobbie):
We recently also purchased a triple locked burgundy FJ80 (Gryffin). When it was delivered, the CEL was on with P0401 showing on the reader.
I know that there has been A LOT written about he P0401, and I have read most of it. However, when I performed the tests in the FSM, I had some strange results:
Some may immediately say "delete it and move on". I don't want to do that. I want to isolate the problem and then decide whether to fix it or not. Any advice?
- Flushed the transmission fluid
- Changed the kick-down cable
- Changed the shocks
- Swapped the coils between left and right (were installed wrong before I purchased it)
- Changed oil and oil filter
- Changed front and rear axle oil
- Changed the transaxle oil
- Flushed the coolant system
- Replaced external and internal weather strips on all 4 doors
- Added grease to the Birfields
- Cleaned the ABS sensors (the ABS light was on)
We recently also purchased a triple locked burgundy FJ80 (Gryffin). When it was delivered, the CEL was on with P0401 showing on the reader.
I know that there has been A LOT written about he P0401, and I have read most of it. However, when I performed the tests in the FSM, I had some strange results:
- The cap of the EGR modulator doesn't come off on the green FJ80. It does on the burgundy FJ80. Burgundy one is clean.
- I applied air to both vehicles at Port Q, with ports P and R blocked. Neither vehicle vented through the sides of the EGR modulator.
- I applied vacuum to the EGR with a vacuum hand pump on both vehicles and it didn't cause either vehicle to run rough or die.
- Cold, with vacuum applied between the modulator and the EGR on either vehicle, it pulled no vacuum at idle, or 2500 RPM. Also, once it heated up, there was still no vacuum.
Some may immediately say "delete it and move on". I don't want to do that. I want to isolate the problem and then decide whether to fix it or not. Any advice?