What are the common causes of C1200?

An intermittent short to battery in the left front inlet valve wiring. A poor or intermittent connection at the anti-lock brake control module. A failed anti-lock brake control module. A chafed left front inlet valve wire shorting to battery voltage.

Read the left front inlet valve status on a scan tool. Inspect the left front inlet valve wiring for chafing. Wiggle test the anti-lock brake control module connector. Test the inlet valve circuit for a short to battery voltage. Repair the wiring or replace the control module if the short stays. Clear the code and retest.

C1200

ABS Inlet Valve Coil LF Circuit Short To Battery

System: Chassis control (C code)
Lamp: ABS Light
Category: Chassis

What it means

C1200 means ABS Inlet Valve Coil LF Circuit Short To Battery.

Where it lives

For C1200, the circuit described runs through the valve. The description of C1200 reports the valve as shorted.

Check these first

An intermittent short to battery in the left front inlet valve wiring
A poor or intermittent connection at the anti-lock brake control module
A failed anti-lock brake control module
A chafed left front inlet valve wire shorting to battery voltage

What to do next

Read the left front inlet valve status on a scan tool
Inspect the left front inlet valve wiring for chafing
Wiggle test the anti-lock brake control module connector
Test the inlet valve circuit for a short to battery voltage
Repair the wiring or replace the control module if the short stays
Clear the code and retest

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Updated

Generic SAE J2012 definition. Last updated 2026-10-10.