B1456: Washer Fluid Indicator Short to Battery
The B1456 code indicates that the Body Control Module (BCM) has detected an unwanted short to battery voltage (B+) in the washer fluid level indicator circuit. This means the signal or ground wire for the indicator is receiving constant or intermittent battery voltage, preventing the BCM from properly controlling the lamp.
1. Commonly Affected Makes
2. Most Common Causes
- Wiring in the washer fluid lamp circuit shorted to battery positive (B+)
- Faulty washer fluid level switch with internal short to battery voltage
- Internally damaged Body Control Module (BCM)
- Corroded or bent connector pins bridging power circuits with the lamp circuit
3. Symptoms You Will Notice
- Washer fluid warning lamp stays on continuously or flashes erratically
- Washer fluid warning lamp fails to illuminate when fluid is low
4. Step-by-Step Diagnosis
Check for technical service bulletins (TSBs) related to the B1456 code
Visually inspect the washer fluid level switch and wiring harness for damage, corrosion, or shorts to battery positive
Test the washer fluid level switch for internal short to B+ using a multimeter
Check connector pins for corrosion, bent pins, or pushed-out terminals
If wiring and switch are okay, test the BCM output to the lamp circuit; replace BCM if necessary
5. Frequently Asked Questions
Is it safe to drive?▼
Yes, it is generally safe to drive with this code, as it only affects the washer fluid warning lamp. However, you may not be alerted when washer fluid is low, so check fluid level manually.
How much does it cost to fix?▼
Repair costs typically range from $100 to $400, depending on the cause. A faulty switch or wiring repair is on the lower end, while BCM replacement can be higher.