How severe is fault code C1250?

Serious — Stop or limit driving

OBD Code C1250: ABS Inlet Valve Coil LR Circuit Failure

Q: What does OBD code C1250 mean?

ABS Inlet Valve Coil LR Circuit Failure. The ABS system's left-rear inlet valve coil isn't working properly, like a stuck solenoid that won't open and close. This prevents the ABS from modulating brake pressure correctly on that wheel.

Q: What are the symptoms of fault code C1250?

ABS warning light illuminated on dashboard, ABS system disabled or inoperative, Reduced braking performance during emergency stops

💬

What This Actually Means

In plain language — no jargon

The ABS system's left-rear inlet valve coil isn't working properly, like a stuck solenoid that won't open and close. This prevents the ABS from modulating brake pressure correctly on that wheel.

⚡

Symptoms You May Notice

3 known symptoms for this code

ABS warning light illuminated on dashboard

ABS system disabled or inoperative

Reduced braking performance during emergency stops

🔬

Embedded Systems Insight

What the ECU/ECM is actually computing

The ABS module monitors coil resistance and current draw in the left-rear inlet valve solenoid during activation cycles. It detects open circuits, shorts to ground, or excessive resistance that prevents normal valve operation.

Voltage & Parameter Thresholds

Parameter	Normal Range	Fault Condition
Coil Resistance	6-14 ohms	Open circuit or >20 ohms
Solenoid Current Response	0.5-2.5 amps during activation	No current draw or excessive draw >3 amps

🔧

Diagnostic & DIY Fix Guide

Check these in order — from cheapest to most complex

1

ABS wiring harness connector

Inspect and reseat the left-rear ABS module connector for corrosion or loose pins.

2

ABS inlet valve solenoid coil (LR)

Test coil resistance with multimeter; replace if reading is open or out of specification range.

3

ABS module wiring and connectors

Check for damaged wires, pinched harnesses, or corroded connections along the left-rear brake line routing.