---
title: "C1AB4 and C1AB5 Toyota - Blind Spot Monitor"
slug: c1ab4
collection: obd2-codes
code: C1AB4
url: https://fixmycar.pk/obd2-code-list/c1ab4/
---
This C1AB4 Diagnostic Trouble Code (DTC) is stored when the Blind Spot Monitor Sensor Left (LH) detects an open in the Outer Rear View Mirror Sub-Assembly Left (LH) (Outer Rear View Mirror Indicator Left \[LH\]).

C1AB5 Toyota DTC code is stored when the Blind Spot Monitor Sensor Right (RH) detects an open in the Outer Rear View Mirror Sub- Assembly Right (RH) (Outer Rear View Mirror Indicator Right \[RH\]).

![](/uploads/2025/01/C1AB4-Toyota.jpg)