C1252
ABS Inlet Valve Coil LR Circuit Short To Battery
Chassis Chassis/Safety ABS Solenoid Circuit 🔴 Serious — Stop or limit driving
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What This Actually Means
In plain language — no jargon

The ABS system's left rear inlet valve coil is electrically shorted to the battery's positive voltage, preventing the valve from opening and closing properly. Think of it like a light switch stuck in the 'on' position due to a broken wire touching the power line.

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Symptoms You May Notice
3 known symptoms for this code
ABS warning light illuminated on dashboard
Loss of ABS function; brake pedal may feel harder or pulsate abnormally
Potential wheel lockup during hard braking
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Embedded Systems Insight
What the ECU/ECM is actually computing

The ABS module monitors the voltage and resistance across the left rear inlet valve solenoid coil during operation. A short-to-battery condition causes the measured voltage to remain at or near battery voltage continuously, rather than cycling as the valve is energized and de-energized. The ECU detects this abnormal voltage signature and logs a fault.

Voltage & Parameter Thresholds

Parameter Normal Range Fault Condition
Coil Voltage 0V (de-energized) to ~12V (energized, cycling) Sustained 12V+ voltage indicating short-to-battery
Coil Resistance 6-14 ohms nominal Resistance reading below normal, or open circuit detected
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Diagnostic & DIY Fix Guide
Check these in order — from cheapest to most complex
1
ABS inlet valve solenoid coil (left rear)
Replace the faulty solenoid coil assembly; disconnect battery before removing the old coil and installing the new one.
2
Wiring harness and connectors (LR ABS circuit)
Inspect and replace any damaged or pinched wiring between the ABS module and left rear solenoid valve.
3
ABS module connector pins
Clean or replace corroded connector pins on the ABS module that may be causing a short to ground or battery.