B1318 — Battery Voltage Low

Q: "Can I drive with this code?"

"It depends on the severity. If the vehicle runs normally, short trips are usually OK. If you notice performance issues, drivability problems, or warning lights beyond the check engine light, get it checked soon."

Q: "Will this code clear itself?"

"Some codes clear automatically after the underlying issue is fixed and several drive cycles pass. But the root cause must be addressed first."

Q: "How do I find the exact cause?"

"A code alone doesn't pinpoint the failed part. You need a diagnostic scan ($50-150 at most shops) that reads freeze frame data and live sensor readings to identify the specific component."

What Does B1318 Mean?

B1318 is a diagnostic trouble code indicating: Battery Voltage Low. This code relates to the body electrical system. It has been reported in NHTSA complaints across 1 different vehicle models.

Real Owner Reports

From NHTSA complaint database — actual owner descriptions.

"WHILE DRIVING THE VEHICLE WILL HAVE NOT HAVE ANY THROTTLE RESPONSE AND "CHECK ELECTRONIC THROTTLE COMPONENT" SHOWS ON DASH. AFTER PULLING TO THE SIDE OF THE ROAD, OR COASTING INTO SOMEONE'S DRIVE-WAY ON A CURVEY ROAD, TURN THE IGNITION OFF AND SIT FOR A FEW MINUTES AND RESTART ENGINE AND IS FINE. HA"
— Ford Expedition owner, 12/04/2008

Source: NHTSA Complaints Database

Most Reported Vehicles for B1318

Based on NHTSA owner complaint data.

#	Vehicle	Reports
1	FORD EXPEDITION

Frequently Asked Questions

Can I drive with this code?

It depends on the severity. If the vehicle runs normally, short trips are usually OK. If you notice performance issues, drivability problems, or warning lights beyond the check engine light, get it checked soon.

Will this code clear itself?

Some codes clear automatically after the underlying issue is fixed and several drive cycles pass. But the root cause must be addressed first.

How do I find the exact cause?

A code alone doesn't pinpoint the failed part. You need a diagnostic scan ($50-150 at most shops) that reads freeze frame data and live sensor readings to identify the specific component.

What To Do Next

Possible Fixes

🔧 Have the code scanned with a professional-grade scanner to read freeze frame data
🔧 If DIY repair isn't feasible, get a diagnostic from a trusted mechanic ($50-150)

1
Find your vehicle above
Click your make and model for real owner reports and common causes specific to your vehicle.
2
Check for recalls
Go to nhtsa.gov/recalls and enter your VIN. Free repairs if covered.
3
Get a professional diagnosis
A code alone doesn't identify the exact failed part. A diagnostic ($50–$150) pinpoints the root cause.

B1318: Battery Voltage Low