Brake System Fault - ABS Module Communications
Indicates a communication issue with the ABS module.
Heads up: this code wasn't in our hand-written library yet, so DiagCoach AI built this page on the fly. Double-check critical specs against service info before condemning parts.
What it means (plain English)
The computer can't talk to the ABS module, which helps with braking and stability control, so your brakes may not work as well as they should.
What the computer is actually seeing
The engine or body control module detects no response or irregular signals from the ABS module, usually indicated by voltage levels outside the normal range.
What a healthy reading looks like
Normal voltage level from the ABS module should be around 10-13.5 volts during communication attempts, and normal response times should be under 100 milliseconds.
Guided diagnostic — the DiagCoach way
Don't just throw parts at it. Walk through these in order — each step tells you whether to keep going or stop and fix what you found.
- 1Inspect the ABS module connector and wiring for damage or corrosion. If found, repair the wiring and reconnect.
- 2Check the ABS circuit fuse. Replace if blown and retest the system.
- 3Using a multimeter, check for battery voltage (10-13.5V) at the ABS module connector while the ignition is on. If no voltage, trace back to the source.
- 4If voltage is okay, connect a scan tool to check for additional codes related to the ABS module. If other codes exist, troubleshoot them based on their descriptions.
Common causes
- Damaged or corroded wiring to the ABS module
- Faulty ABS module
- Blown fuse in the ABS circuit
- Poor connection at the connector for the ABS module
Typical repair cost
$$$
Related codes
Frequently asked questions
Is it safe to drive with this code?
No, due to potential loss of braking performance, you should fix this before driving.
Will this code come back after clearing?
If the issue isn't resolved, the code will likely return. It's a communication fault that needs attention.
Why does this code pair with others?
Codes are often set together when there's a systemic issue affecting the ABS system or related modules.
Working a real vehicle right now?
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