What are the symptoms of C1203?

Symptoms of C1203 include: ABS light on, Brake warning light, Hard brake pedal, ABS not functioning.

To fix C1203, you can try: Replace brake booster pressure sensor ($150-$400, intermediate); Check brake fluid level ($20-$50, beginner); Bleed ABS system ($100-$250, intermediate). Based on 0 owner reports.

C1203High Priority

ABS Outlet Valve Coil Rear Circuit Open

Category: Chassis• Suspension

Reference page

What is C1203?

ABS Malfunction (Brake Booster Pressure Sensor). Problem with the brake booster pressure sensor in the ABS system.

Symptoms You May Notice

●ABS light on
●Brake warning light
●Hard brake pedal
●ABS not functioning

How to Fix It

●Replace brake booster pressure sensor ($150-$400, intermediate)
●Check brake fluid level ($20-$50, beginner)
●Bleed ABS system ($100-$250, intermediate)

Issues by Vehicle

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Reference Information Only

This is a general OBD-II code reference. We're actively collecting real owner experiences and repair data for this code. Check back soon for vehicle-specific troubleshooting guides.