C1201 on TOYOTA TUNDRA — ABS Inlet Valve Coil LF Circuit Short To Ground

Q: "What does C1201 mean on a TOYOTA TUNDRA?"

"C1201 indicates: ABS Inlet Valve Coil LF Circuit Short To Ground. This is a chassis code. 2 TOYOTA TUNDRA owners have reported this to NHTSA."

Q: "What are the most common causes of C1201 on TOYOTA TUNDRA?"

"Based on 2 NHTSA reports, the most commonly cited components are: Engine And Engine Cooling,Power Train, Electrical System,Service Brakes,Engine. These percentages are based on the component field in owner complaints."

Q: "Is C1201 serious on my TOYOTA TUNDRA?"

"Of 2 NHTSA reports for this code on TOYOTA TUNDRA, 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 TUNDRA shows C1201?"

"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 C1201 Means on Your TOYOTA TUNDRA

C1201 is a diagnostic trouble code indicating: ABS Inlet Valve Coil LF Circuit Short To Ground. This code relates to the chassis system. The vehicle's computer detected a condition outside normal operating parameters and stored this code.

2 TOYOTA TUNDRA owners have reported this issue to NHTSA across model years 2008-2015. Most reports come from the 2008, 2015 model years. The most commonly reported component is Engine And Engine Cooling,Power Train (50.0% of reports).

Real TOYOTA TUNDRA Owner Reports

Source: NHTSA Complaints Database

"My truck was parked for 3 days, then when i started the engine all of the traction control lights started flashing, the check engine light remained on steady, and 4lo light flashed, truck would not travel over 30 mph and became very sluggish."

— 2008 TOYOTA TUNDRA owner · ENGINE AND ENGINE COOLING,POWER TRAIN · Filed 02/06/2012

"When at 55 degrees or below getting a misfire on cylinder 2, engine light on with traction control off on my display (not the actual icon). code reader says p0302, c1201, and b1242. engine light starting flashing, juddering really bad when accelerating to 70mph."

— 2015 TOYOTA TUNDRA owner · ELECTRICAL SYSTEM,SERVICE BRAKES,ENGINE · Filed 01/16/2021

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

📊 Complaint Trend by Model Year

1

'08

1

'15

Common Causes on TOYOTA TUNDRA

Based on NHTSA complaint component analysis for this vehicle.

ENGINE and ENGINE COOLING,POWER TRAIN 50%

ELECTRICAL SYSTEM,SERVICE BRAKES,ENGINE 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 C1201 mean on a TOYOTA TUNDRA? ▾

C1201 indicates: ABS Inlet Valve Coil LF Circuit Short To Ground. This is a chassis code. 2 TOYOTA TUNDRA owners have reported this to NHTSA.

What are the most common causes of C1201 on TOYOTA TUNDRA? ▾

Based on 2 NHTSA reports, the most commonly cited components are: Engine And Engine Cooling,Power Train, Electrical System,Service Brakes,Engine. These percentages are based on the component field in owner complaints.

Is C1201 serious on my TOYOTA TUNDRA? ▾

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

What should I do if my TOYOTA TUNDRA shows C1201? ▾

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.

C1201 on Other Vehicles

→ All codes reported on TOYOTA TUNDRA