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C1223: Lamp Brake Warning Output Circuit Failure

Severity
Low
NHTSA Reports
3
Vehicles Affected
2
System
Powertrain

What Does C1223 Mean?

C1223 is a diagnostic trouble code indicating: Lamp Brake Warning Output Circuit Failure. This code relates to the chassis system. It has been reported in NHTSA complaints across 2 different vehicle models.

Symptoms of C1223

C1223 Reports by Year

2013
1
2015
1
2016
1

Real Owner Reports

From NHTSA complaint database — actual owner descriptions.

"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. SINCE THEN THE WARNING LIGHTS HAVE BEEN ON AND OFF AND SO I'VE BEEN HAVING DIFFICULTIES WH"

— Toyota Rav4 owner, 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. ON OCTOBER 8, 2015, WHILE I WAS DRIVING MY CAR BACK FROM STANFORD LUCILE PACKARD OVER DUMBARTON BRIDGE, I HAVE NOTI"

— Toyota Rav4 owner, 10/08/2015

"TAKATA INFLATORS,ABS. PURCHASED VEHICLE USED 08/12/2016 THE FOLLOWING MIL CODES WERE CLEARED BY SELLING DEALERSHIP. C1223, P0456, B1150, CR123, C1241, B1152. NEEDED REPAIR IMMEDIATELY, PASSED STATE INSPECTION EVEN NEEDING THE FOLLOWING REPAIRS, BOTH FRONT AXLES, SERP BELT, SWAY BAR LINK AND REAR "

— Toyota 4Runner owner, 08/22/2016

Source: NHTSA Complaints Database

Most Reported Vehicles for C1223

Based on NHTSA owner complaint data.

# Vehicle Reports
1 TOYOTA RAV4
2 TOYOTA 4RUNNER

C1223 Reports by Vehicle

Detailed NHTSA complaint analysis for each vehicle model.

TOYOTA RAV4
2 NHTSA reports · Peak: 2007, 2008

Frequently Asked Questions

Can I drive with this code?
It depends on the severity. If the vehicle runs normally, short trips are usually OK. If you notice performance issues, drivability problems, or warning lights beyond the check engine light, get it checked soon.
Will this code clear itself?
Some codes clear automatically after the underlying issue is fixed and several drive cycles pass. But the root cause must be addressed first.
How do I find the exact cause?
A code alone doesn't pinpoint the failed part. You need a diagnostic scan ($50-150 at most shops) that reads freeze frame data and live sensor readings to identify the specific component.

What To Do Next

Possible Fixes

  • 🔧 Have the code scanned with a professional-grade scanner to read freeze frame data
  • 🔧 If DIY repair isn't feasible, get a diagnostic from a trusted mechanic ($50-150)
  1. 1
    Find your vehicle above

    Click your make and model for real owner reports and common causes specific to your vehicle.

  2. 2
    Check for recalls

    Go to nhtsa.gov/recalls and enter your VIN. Free repairs if covered.

  3. 3
    Get a professional diagnosis

    A code alone doesn't identify the exact failed part. A diagnostic ($50–$150) pinpoints the root cause.

Related Codes

C1200 ABS Inlet Valve Coil LF Circuit Short To Battery C1201 ABS Inlet Valve Coil LF Circuit Short To Ground C1202 ABS Outlet Valve Coil Rear Circuit Failure C1203 ABS Outlet Valve Coil Rear Circuit Open C1204 ABS Outlet Valve Coil Rear Circuit Short To Battery C1205 ABS Outlet Valve Coil Rear Circuit Short To Ground C1206 ABS Inlet Valve Coil Rear Circuit Failure C1207 ABS Inlet Valve Coil Rear Circuit Open C1208 ABS Inlet Valve Coil Rear Circuit Short To Battery C1209 ABS Inlet Valve Coil Rear Circuit Short To Ground