OBD-II Fault Code

C1264: Lamp Warning Relay Circuit Short To Battery

Meaning, symptoms, likely causes, diagnostic checks and repair guidance for C1264.

System family

Chassis

Manufacturer-specific

Repair category

Lighting

Use this category to narrow your checks before replacing parts.

Severity

Medium

Severity is a general guide. Confirm with scan-tool data and vehicle symptoms.

What C1264 usually means

Lamp Warning Relay Circuit Short To Battery.

Common symptoms

ABS/traction/steering/suspension warning lamp or abnormal chassis behaviour

Likely causes

Blown bulb/LED module; Poor ground; Fuse/relay fault; Switch/module/wiring issue; Wire shorted to power feed; Incorrectly repaired harness; Internal component short

Diagnostic checks

Inspect wheel/brake/suspension area, connectors, sensor wiring and module power/ground; Check bulb/module, fuse, ground and connector corrosion; Check for unwanted voltage on signal/control circuit

Repair guidance

Replace failed bulb/module, repair ground/wiring, replace switch/relay if confirmed; Repair harness short to power or replace internally shorted component

Verification after repair

Clear code, road-test safely at low speed first, then rescan

Note: Confirm vehicle make/model/year because manufacturer-specific codes can vary; Manufacturer-specific: confirm definition and test steps in the vehicle service manual. A DTC identifies a circuit or system condition, not always the failed part.