P0D91 — Battery Charger Coupler Lock Control Circuit/Open

What Does P0D91 Mean?

P0D91 is a diagnostic trouble code indicating: Battery Charger Coupler Lock Control Circuit/Open. This code relates to the vehicle systems system. The vehicle's computer detected a condition outside normal operating parameters and stored this code.

Symptoms of P0D91

⚠️ Check Engine Light (MIL) illuminated
⚠️ Erratic Battery Charger Coupler Lock readings
⚠️ Related system operating intermittently
⚠️ System warning light illuminated

Common Causes

🔍 Wiring issue in Battery Charger Coupler Lock circuit (damaged, chafed, or corroded)
🔍 Faulty Battery Charger Coupler Lock connector or terminal
🔍 Failed Battery Charger Coupler Lock
🔍 ECM/PCM connection issue

Frequently Asked Questions

What does P0D91 mean?

P0D91 indicates: Battery Charger Coupler Lock Control Circuit/Open. The vehicle's computer has detected that the Battery Charger Coupler Lock is not operating within its expected parameters and stored this diagnostic trouble code.

Can I drive with code P0D91?

You can drive short distances for essential trips, but schedule a diagnosis soon. Driving with P0D91 for extended periods may cause additional problems.

How much does it cost to fix P0D91?

Repair costs for P0D91 typically range from $80 to $300, depending on the root cause. Simple wiring or connector repairs are on the lower end, while component replacement costs more. A proper diagnosis ($80–$150 at most shops) will identify the exact cause before committing to expensive parts.

What To Do Next

Possible Fixes

🔧 Inspect and repair Battery Charger Coupler Lock wiring and connectors
🔧 Replace faulty Battery Charger Coupler Lock

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.

P0D91: Battery Charger Coupler Lock Control Circuit/Open