C1223 on TOYOTA RAV4 — Lamp Brake Warning Output Circuit Failure

Q: "What does C1223 mean on a TOYOTA RAV4?"

"C1223 indicates: Lamp Brake Warning Output Circuit Failure. This is a chassis code. 2 TOYOTA RAV4 owners have reported this to NHTSA."

Q: "What are the most common causes of C1223 on TOYOTA RAV4?"

"Based on 2 NHTSA reports, the most commonly cited components are: Steering,Electrical System,Vehicle Speed Control,Service Brakes, Steering,Wheels,Service Brakes. These percentages are based on the component field in owner complaints."

Q: "Is C1223 serious on my TOYOTA RAV4?"

"Of 2 NHTSA reports for this code on TOYOTA RAV4, none involved a crash or fire. However, any diagnostic code should be evaluated by a qualified mechanic."

Q: "What should I do if my TOYOTA RAV4 shows C1223?"

"1) Check for recalls on your VIN at nhtsa.gov/recalls. 2) Get a professional diagnosis — a code alone doesn't identify the exact failed part. 3) Get 2-3 repair estimates to compare."

What C1223 Means on Your TOYOTA RAV4

C1223 is a diagnostic trouble code indicating: Lamp Brake Warning Output Circuit Failure. This code relates to the chassis system. The vehicle's computer detected a condition outside normal operating parameters and stored this code.

2 TOYOTA RAV4 owners have reported this issue to NHTSA across model years 2007-2008. Most reports come from the 2007, 2008 model years. The most commonly reported component is Steering,Electrical System,Vehicle Speed Control,Service Brakes (50.0% of reports).

Real TOYOTA RAV4 Owner Reports

Source: NHTSA Complaints Database

"On march 21st the abs, vsc, traction and brake warning lights came on while driving at 35 mph in dry weather condition. when the lights were on, the abs system was triggered making difficult to brake to stop."

— 2007 TOYOTA RAV4 owner · STEERING,ELECTRICAL SYSTEM,VEHICLE SPEED CONTROL,SERVICE BRAKES · Filed 04/21/2013

"On october 5 and 6, 2015 my 2008 toyota rav4 was in for service at piercey toyota in milpitas to replace all four tires, front/back brakes and front shock absorbers, a total of $2,000."

— 2008 TOYOTA RAV4 owner · STEERING,WHEELS,SERVICE BRAKES · Filed 10/08/2015

All reports filed by vehicle owners directly with the U.S. Department of Transportation.

📊 Complaint Trend by Model Year

1

'07

1

'08

Common Causes on TOYOTA RAV4

Based on NHTSA complaint component analysis for this vehicle.

STEERING,ELECTRICAL SYSTEM,VEHICLE SPEED CONTROL,SERVICE BRAKES 50%

STEERING,WHEELS,SERVICE BRAKES 50%

What To Do Next

1
Check for recalls on YOUR VIN
Go to nhtsa.gov/recalls and enter your VIN. If your vehicle is covered, repairs are free.
2
Get a proper diagnosis
A code alone doesn't tell you the exact failed part. A diagnostic at a shop ($50–$150) pinpoints the root cause before you spend money on parts.
3
Compare repair quotes
Get 2–3 quotes. Dealer vs. independent shop prices often differ 30–50% for the same repair.

Frequently Asked Questions

What does C1223 mean on a TOYOTA RAV4? ▾

C1223 indicates: Lamp Brake Warning Output Circuit Failure. This is a chassis code. 2 TOYOTA RAV4 owners have reported this to NHTSA.

What are the most common causes of C1223 on TOYOTA RAV4? ▾

Based on 2 NHTSA reports, the most commonly cited components are: Steering,Electrical System,Vehicle Speed Control,Service Brakes, Steering,Wheels,Service Brakes. These percentages are based on the component field in owner complaints.

Is C1223 serious on my TOYOTA RAV4? ▾

Of 2 NHTSA reports for this code on TOYOTA RAV4, none involved a crash or fire. However, any diagnostic code should be evaluated by a qualified mechanic.

What should I do if my TOYOTA RAV4 shows C1223? ▾

1) Check for recalls on your VIN at nhtsa.gov/recalls. 2) Get a professional diagnosis — a code alone doesn't identify the exact failed part. 3) Get 2-3 repair estimates to compare.

C1223 on Other Vehicles

→ All codes reported on TOYOTA RAV4