Lexus LS430 "Check PCS" Error and TSB

Many Lexus LS owners have been asking for the TSB or TSIB related to the problem associated with the 2004-2006 Lexus LS430 Pre Collision System. I have attached a link so you can download the file and see for yourself what Lexus has posted regarding this issue.

Error Message Below RPM Gauge

"Some 2005 – 2006 model year LS 430 owners may experience a condition where the dynamic radar cruise control is inoperative, with “Check PCS” called out on the multi-information display. Diagnostic Trouble Codes (DTCs) B2056 and P1572 may also be stored. An updated cruise control computer has been made available to correct this issue." - From Lexus Technical Service Bulletin (EL012-06) Nov 9, 2006

Contact me to Download a FREE PDF document.

Post a comment with your year and mileage. I'm trying to keep track of all the problems associated with this TSB in hopes of getting us all reimbursed for this costly repair!

I have kept a running list of people reaching out to me about their "Check PCS System" problem. Visit my Google Map link to see what cars, mileage, and location these other Lexus owners have reported to me.

Lexus LS430 Ultra Luxury

My mission to find a 2004-2006 Lexus LS430 Ultra Luxury was finally accomplished. I found a very clean-looking 2005 LS430 UL located in Oklahoma City, OK at John Vance Autos. The car was listed on AutoTrader, Ebay, and Cars.com. After some lengthy discussions with the expert sales staff, I decided to make the trip.

I used my frequent flyer miles from Delta Airlines and booked a roundtrip flight to Oklahoma City. Took an early flight so that I could use the roundtrip ticket if the car didn't check out. The dealer provided a free shuttle (30min drive) to their lot. When i arrived at the dealer, i saw the LS sitting there. I was amazed at how clean it was. I first thought this was NOT the car, but it was. I did a physical inspection and then a 20min drive. The car looked great, felt good and then the paperwork was completed. The staff at John Vance was great. I'm glad we did business and this car was exactly what i wanted.


The next step in the search was returning home. The trip was about 650 miles from Oklahoma City to Huntsville, AL. I left around 2 pm and made it home at 1 am. It was a long drive, but didn't seem so bad sitting behind this luxo-cruiser.


Problems about this car:
On the drive home the Radar Cruise Control stopped working suddenly. I knew immediately what the problem was, as many ClubLexus members have posted problems with the PCS System. Looks like there issue was with the ECU located behind the passenger glove box. This part, MSRP $778.17 from Lexus, has been re-designed by Denso. The original part is prone to failure, so my cruise stopped working at 250miles into the trip home.

Searching for LS430 Ultra Luxury

After two failed attempts to find my next car, I'm doubting that my next car exists. I've recently decided that another LS430 Ultra Luxury sedan would be a good replacement for my Lexus SC430. I've taken two road trips to buy this car, but both of them had less than acceptable paint work. My search continues for a 2004-2006 LS430 UL.

Search for a new vehicle

It's not much of a surprise that I'm in the market for another used car. This cycle occurs every 2-4 years and usually results in me loosing money on the deal. Not that I'm over paying for the cars I buy, but after selling my car and getting a new one, the exchange always results in more money being applied to the car fund.



This time around I'm looking for a four-door vehicle that comfortable seats 4 adults. I'm considering several cars and SUVs including the 2005-2008 Acura RL, 2003-2007 Lexus GX470, 2006-2008 Lexus GS430, 2003-2007 Lexus LX470, and Acura MDX. I've owned both Acura's and Lexus cars before, and noticed the quality differences between the two. That's not to say that there are not Lexus vehicles that have less than stellar build quality. For instance, the Lexus GX470 has some of the worst leather I've seen in their model lineup. It doesn't hold up well, as I've witnessed on several 2004 and 2005 used SUVs. And the numerous Acura RLs i've looked at have held up poorly to the daily use of buttons/controls. They seem to also show signs of wear on the leather and plastic inside the cabin.



Since my past cars have been the premium products from Lexus (LS430 Ultra luxury edition and the SC430), my standards are quite high. My search for an affordable, clean used luxury car will continue...