P058A — Battery Monitor Module Performance

What Does P058A Mean?

P058A is a diagnostic trouble code indicating: Battery Monitor Module Performance. This code relates to the vehicle speed and idle control system. The vehicle's computer detected a condition outside normal operating parameters and stored this code.

Symptoms of P058A

⚠️ Check Engine Light (MIL) illuminated
⚠️ Battery Monitor Module not meeting expected output
⚠️ Degraded performance of related system
⚠️ Erratic idle speed

Common Causes

🔍 Battery Monitor Module degraded from age or contamination
🔍 Mechanical wear in Battery Monitor Module or related parts
🔍 Restriction or blockage affecting Battery Monitor Module
🔍 Calibration drift in Battery Monitor Module

Frequently Asked Questions

What does P058A mean?

P058A indicates: Battery Monitor Module Performance. The vehicle's computer has detected that the Battery Monitor Module is not operating within its expected parameters and stored this diagnostic trouble code.

Can I drive with code P058A?

You can drive short distances for essential trips, but schedule a diagnosis soon. Driving with P058A for extended periods may cause additional problems.

How much does it cost to fix P058A?

Repair costs for P058A typically range from $50 to $400, 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 Battery Monitor Module for contamination or wear
🔧 Replace Battery Monitor Module
🔧 Address any related mechanical faults

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.

P058A: Battery Monitor Module Performance