C1249
ABS Outlet Valve Coil RR Circuit Short To Ground
Chassis Chassis/Safety ABS System 🔴 Serious — Stop or limit driving
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What This Actually Means
In plain language — no jargon

The rear-right ABS brake valve coil has a short circuit to ground, like a light switch that's stuck in the on position draining power. This prevents the ABS system from properly modulating brake pressure on that wheel.

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Symptoms You May Notice
3 known symptoms for this code
ABS warning light illuminated on dashboard
Loss of ABS function; wheels may lock during hard braking
Possible rear-right brake drag or reduced braking performance
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Embedded Systems Insight
What the ECU/ECM is actually computing

The ECU monitors the coil circuit resistance and current draw when energizing the RR outlet valve solenoid. A short to ground causes excessive current flow and near-zero resistance, triggering the fault. The ECU compares actual resistance against expected operating thresholds to detect this condition.

Voltage & Parameter Thresholds

Parameter Normal Range Fault Condition
Coil Resistance 4-8 ohms Less than 1 ohm or zero ohms
Circuit Current 0.5-1.5 amps Over 2 amps (excessive draw)
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Diagnostic & DIY Fix Guide
Check these in order — from cheapest to most complex
1
Wiring harness connector
Inspect and clean the RR outlet valve connector for corrosion, moisture, or loose pins causing a short.
2
Wiring harness (RR ABS circuit)
Check for pinched, abraded, or damaged insulation along the RR outlet valve wiring; repair or replace if shorted to vehicle ground.
3
RR ABS outlet valve solenoid
Replace the faulty solenoid coil if wiring and connectors are confirmed intact and undamaged.