P0ADC — Hybrid/EV Battery Positive Contactor Control Circuit High

What Does P0ADC Mean?

P0ADC is a diagnostic trouble code indicating: Hybrid/EV Battery Positive Contactor Control Circuit High. This code relates to the hybrid powertrain system. The vehicle's computer detected a condition outside normal operating parameters and stored this code.

Symptoms of P0ADC

⚠️ Check Engine Light (MIL) illuminated
⚠️ Hybrid/EV Battery Positive Contactor reading stuck at maximum value
⚠️ Related system operating erratically or in default mode
⚠️ Hybrid system warning light

Common Causes

🔍 Short to voltage in Hybrid/EV Battery Positive Contactor wiring harness
🔍 Corroded or water-damaged Hybrid/EV Battery Positive Contactor connector
🔍 Faulty Hybrid/EV Battery Positive Contactor outputting maximum voltage
🔍 Damaged wiring rubbing against metal components
🔍 ECM/PCM internal fault (rare)

Frequently Asked Questions

What does P0ADC mean?

P0ADC indicates: Hybrid/EV Battery Positive Contactor Control Circuit High. The vehicle's computer has detected that the Hybrid/EV Battery Positive Contactor is not operating within its expected parameters and stored this diagnostic trouble code.

Can I drive with code P0ADC?

Only short distances if absolutely necessary. P0ADC affects a critical system and should be diagnosed within a few days to avoid further damage.

How much does it cost to fix P0ADC?

Repair costs for P0ADC typically range from $20 to $500, 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 Hybrid/EV Battery Positive Contactor wiring for short to voltage
🔧 Clean or replace corroded Hybrid/EV Battery Positive Contactor connector
🔧 Replace faulty Hybrid/EV Battery Positive Contactor

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.

P0ADC: Hybrid/EV Battery Positive Contactor Control Circuit High