C1277ABS

ABS Motor Relay / Pump Motor Circuit

C1277 indicates a fault in the ABS motor relay or pump motor circuit, seen on Toyota and Honda systems. Without the pump motor the module cannot build ABS pressure and disables ABS.

🚗 Yes, but ABS and stability control are likely disabled, so fix it promptly.

HIGH

severity

🎯 Top Causes, Ranked by Likelihood

#1Failed pump motor or relay$200-$1000

40%

The ABS pump motor or its relay has failed.

#2Wiring or connector fault$50-$300

25%

Damaged power or ground wiring to the pump motor.

#3ABS actuator/module fault$400-$1200

20%

Internal driver fault in the ABS actuator.

#4Low system voltage$100-$300

15%

Weak battery affects pump motor operation.

🩺 Common Symptoms

ABS warning light on
Traction and stability control lights on
ABS pump does not run in self-test
Firm or unusual brake pedal

💰 Repair Cost: DIY vs Shop

DIY Cost

$50-$1000

Shop Cost

$200-$1200

📋 Free OBD2 Code Cheat Sheet

The 50 most common codes with likely cause and DIY fix cost. Sent once, no spam.

🔧 How to Diagnose C1277

1Scan and record all ABS codes

2Check ABS fuses, relay, and battery voltage

3Verify power and ground at the pump motor

4Command the pump with a scan tool and listen for it

❓ Frequently Asked Questions

Can I drive with C1277?

Yes, normal braking works, but ABS and stability control are off. Drive carefully and fix it soon.

How much to fix C1277?

A relay is cheap, but a pump motor or actuator repair can run $200-$1200.

What causes C1277 most often?

A failed ABS pump motor or motor relay, or a wiring fault to the pump.

🔗 Related Codes

C1223C1256C0110C1214