ABS code C0236 & C1223
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10th Gear
Joined: Aug 2018
Posts: 10
Likes: 2
From: CA
ABS code C0236 & C1223
[img alt="2003 GX 470
Went on a roadtrip, abs, brake light went on, pulled the code and saw these 2 codes.
Restarted the car and lights are gone but code is stored.
No brake issues or noises from the abs pump.
Any ideas on what i should check?"]https://cimg4.ibsrv.net/gimg/www.clublexus.com-vbulletin/2000x1504/img_5418_5be3f3369716500a5da43053cfc04eeca95117a2.jpeg[/img]
2003 GX 470 Went on a roadtrip, abs, brake light went on, pulled the code and saw these 2 codes. Restarted the car and lights are gone but code is stored. No brake issues or noises from the abs pump. Any ideas on what i should check?
C1223 and C0236
Went on a roadtrip, abs, brake light went on, pulled the code and saw these 2 codes.
Restarted the car and lights are gone but code is stored.
No brake issues or noises from the abs pump.
Any ideas on what i should check?"]https://cimg4.ibsrv.net/gimg/www.clublexus.com-vbulletin/2000x1504/img_5418_5be3f3369716500a5da43053cfc04eeca95117a2.jpeg[/img]
2003 GX 470 Went on a roadtrip, abs, brake light went on, pulled the code and saw these 2 codes. Restarted the car and lights are gone but code is stored. No brake issues or noises from the abs pump. Any ideas on what i should check?
C1223 and C0236
Last edited by lstommy; May 10, 2026 at 05:35 PM.
Lead Lap
Joined: Feb 2014
Posts: 3,663
Likes: 821
From: NC
C0236 points towards a rear wheel speed sensor. I expect the C1223 is a follow-on code to that.
I don't see a reference as to which speed sensor (left/right) C0236 is, so check them both, and check the wiring.
Chip H.
I don't see a reference as to which speed sensor (left/right) C0236 is, so check them both, and check the wiring.
Chip H.
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