ABS Power Relay Circuit Open
The ABS control module has detected an open circuit in the power relay.
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)
This means that the ABS system isn't getting power because the circuit isn't complete, which can happen if there's a broken wire or a bad relay.
What the computer is actually seeing
The ABS module expects to see battery voltage (12-14 volts) at its power relay. When it doesn't, it triggers the C027D code.
What a healthy reading looks like
Power relay should show 12-14 volts when activated.
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.
- 1Check the battery voltage at the ABS module. Should be 12-14 volts.
- 2Inspect the ABS power relay for physical damage; replace if faulty.
- 3Check the wiring and connectors leading to the ABS module; look for breaks or corrosion.
- 4Inspect and replace any blown fuses related to the ABS system.
Common causes
- Open circuit in the ABS power relay circuit
- Faulty ABS power relay
- Damaged wiring or connectors
- Blown fuse for ABS power relay
Typical repair cost
$$$
Related codes
Frequently asked questions
Is it safe to drive with this code?
No, it's not safe to drive since the ABS won't function, leading to reduced braking performance in slippery conditions.
Will this code come back after clearing it?
Yes, if the underlying issue isn't fixed, the code will likely reappear.
What happens if I ignore this code?
Ignoring this code can lead to compromised braking effectiveness, especially under slippery conditions.
Working a real vehicle right now?
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