C1AB2 on Toyota vehicles
C1AB2 is named on 5 Toyota model years (2016): 31 manufacturer filings and 0 owner reports in NHTSA’s files, across Camry, Avalon, Sienna, Tundra, Tacoma.
Which Toyota model years name C1AB2
Source: NHTSA manufacturer communications and complaints| Model year | Filed under | Bulletins | Owner reports |
|---|---|---|---|
| 2016 Toyota Camry | Electrical System | 11 | — |
| 2016 Toyota Avalon | Electrical System | 7 | — |
| 2016 Toyota Sienna | Electrical System | 6 | — |
| 2016 Toyota Tundra | Equipment | 5 | — |
| 2016 Toyota Tacoma | Lane Departure | 2 | — |
A model year is listed because the code is named in its own record — a bulletin filed against it, or an owner’s complaint about it — not because every one of these vehicles sets it. Counts are documents in NHTSA’s files, not failure rates.
Toyota filings that name C1AB2
Source: NHTSA manufacturer communicationsBulletins and campaigns Toyota filed with NHTSA whose summary names C1AB2. Quote the document number at the service desk — it is a diagnosis the maker has already written down.
- T-SB-0049-16 REV Service bulletin2016-07-07 · Equipment
- TSB: SOME 2015 2016 MODEL YEAR AVALON, CAMRY, SIENNA, AND TUNDRA VEHICLES EQUIPPED WITH BLIND SPOT MONITOR MAY EXHIBIT A BLIND SPOT MONITOR WARNING MESSAGE WITH DIAGNOSTIC TROUBLE CODE (DTC) C1AB2 SHORT TO GROUND IN OUTER MIRROR INDICATOR (MASTER) OR C1AB3 SHORT TO GROUND IN OUTER MIRROR INDICATOR (SLAVE) STORED. FOLLOW THE REPAIR PROCEDURE IN THIS BULLETIN TO ADDRESS THIS CONDITION.
- T-SB-0049-16 REV Service bulletin2016-07-07 · Electrical System
- TSB: SOME 2015 2016 MODEL YEAR AVALON, CAMRY, SIENNA, AND TUNDRA VEHICLES EQUIPPED WITH BLIND SPOT MONITOR MAY EXHIBIT A BLIND SPOT MONITOR WARNING MESSAGE WITH DIAGNOSTIC TROUBLE CODE (DTC) C1AB2 SHORT TO GROUND IN OUTER MIRROR INDICATOR (MASTER) OR C1AB3 SHORT TO GROUND IN OUTER MIRROR INDICATOR (SLAVE) STORED. FOLLOW THE REPAIR PROCEDURE IN THIS BULLETIN TO ADDRESS THIS CONDITION.
- T-SB-0049-16 Service bulletin2016-05-26 · Electrical System
- TSB: SOME 2015 2016 MODEL YEAR AVALON, CAMRY, SIENNA, AND TUNDRA VEHICLES EQUIPPED WITH BLIND SPOT MONITOR MAY EXHIBIT A BLIND SPOT MONITOR WARNING MESSAGE WITH DIAGNOSTIC TROUBLE CODE (DTC) C1AB2 SHORT TO GROUND IN OUTER MIRROR INDICATOR (MASTER) OR C1AB3 SHORT TO GROUND IN OUTER MIRROR INDICATOR (SLAVE) STORED. FOLLOW THE REPAIR PROCEDURE IN THIS BULLETIN TO ADDRESS THIS CONDITION.
- T-SB-0010-16 Service bulletin2016-02-18 · Lane Departure — Blind Spot Detection
- TSB: SOME 2016 MODEL YEAR TACOMA VEHICLES EQUIPPED WITH BLIND SPOT MONITOR MAY EXHIBIT A BLIND SPOT MONITOR WARNING MESSAGE WITH DIAGNOSTIC TROUBLE CODE (DTC) C1AB2 SHORT TO GND IN OUTER MIRROR INDICATOR (MASTER) OR C1AB3 SHORT TO GND IN OUTER MIRROR INDICATOR (SLAVE) STORED. FOLLOW THE REPAIR PROCEDURE IN THIS BULLETIN TO ADDRESS THIS CONDITION.
- T-SB-0010-16 Service bulletin2016-02-18 · Visibility — Rearview Mirrors/Devices
- TSB: Some 2016 model year Tacoma vehicles equipped with Blind Spot Monitor may exhibit a Blind Spot Monitor Warning message with Diagnostic Trouble Code (DTC) C1AB2 Short to GND in Outer Mirror Indicator (Master) or C1AB3 Short to GND in Outer Mirror Indicator (Slave) stored. Follow the Repair Procedure in this bulletin to address this condition.
What C1AB2 means
Source: SAE J2012 / OBD-IIC1AB2 is a manufacturer-specific code: the second character is a 1, which under the OBD-II standard hands the definition to whoever built the vehicle. The same code can mean one thing on a Ford and something unrelated on a Hyundai. Any site that prints a single definition for it is guessing.
A stored code names the test that failed, never the part that caused it. The record above is what Toyota and its owners have filed about it; the code’s page across every make has the whole file.
Common questions
Source: NHTSA files and the OBD-II standardIs C1AB2 a known problem on Toyota vehicles?
It is a documented one: NHTSA's files hold 31 manufacturer filings and 0 owner reports naming C1AB2 on 5 Toyota model years (2016). Whether it is a problem on one particular car is a diagnosis, not a count — but a bulletin that names the code on your model year is the place to start.
Which Toyota models does C1AB2 appear on most?
2016 Camry (11 documents), 2016 Avalon (7 documents), 2016 Sienna (6 documents).
Does C1AB2 on a Toyota mean it is recalled?
No. Recalls are filed by campaign and matched by VIN; no recall is triggered by a scan tool. Check the VIN at nhtsa.gov/recalls, or open the model year's page here for the campaigns filed against it.