gcam77

I am need help resolving these codes
C0226
C0236
C0246
C1223.

I recently changed the Master Brake Cyliner/Booster Pump on my 2000 GS300 with a Master Brake Cyliner/Booster from a 2001 GS300 after I got the constant beep with lights in the dash. I am now getting the above mentioned codes. I have been searching and not been able to find a solution.

I would greatly appreciate any help.

gcam77

Hello, any assistance? I am really stumped. Been to a few mechanics and got no where.

Mcon

iTrader: (1)

Your code
C0226, 236 & 246 Is a Open/Short in Hydraulic Brake Booster Solenoid Circuit

C1223 ABS Control System Malfunction.

Cause? You need to check all them out. Isote one by one .

RamAirRckt

I'm seeing a handful of codes like this, only after wheel spin. Does not matter if VSC is on/off. It still trips. They reset themselves after shutting car off for 10 min or so. But wheelspin brings them back.

C0236
C1223
C1226
C1228

rossmer

I just recently had these exact same 4 ABS codes on my 99 GS300 with 145K along with ABS, VSC and VSC OFF lights on the dash. Turned out to be a bad alternator not putting out sufficient voltage which in turn confused the ABS ECU. Car ran fine with no other indications other than the dash lights above. I was measuring around 12.6 V at the battery with the car running at 2500 RPMs and under load (lights on, blower, AC, wipers on). This should measure around 14.2 - 14.5 V running and under load. After replacing with Advance Auto alternator all voltages are normal and codes and lights are gone for good. My alternator looked to be original Denso that was in the car initially. Had a good run.