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P305F Chevrolet Code - Dual Battery Control Module Performance

- Code Popularity: 75,057 Views
- Repair Importance Level: 3/3
- Repair Difficulty Level: 3/3
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What are the Possible Causes of the DTC P305F Chevrolet?

NOTE: The causes shown may not be a complete list of all potential problems, and it is possible that there may be other causes.
  • Low battery charge
  • Faulty Battery
  • Battery harness is open or shorted
  • Battery circuit poor electrical connection
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How to Fix the DTC P305F Chevrolet?

Review the 'Possible Causes' mentioned above and visually examine the corresponding wiring harness and connectors. Ensure to check for any damaged components and inspect the connector pins for signs of being broken, bent, pushed out, or corroded.

Code Tech Notes

There is a factory service bulletin for the following models:

2014-2016 Chevrolet Impala
2014-2016 Chevrolet Malibu

2014-2016 Chevrolet Impala, Malibu Factory Service Bulletin OBDII Code P305F

Condition
There may be several different causes of this code setting and before any component replacements, please follow the recommendations below.
Inspect the Following:
- Inspect for loose unsecured electrical ground.
- Verify the engine harness is not pinched underneath the main battery tray.
- Inspect both main and auxiliary battery cables for being secured.
- Perform the battery inspection/test in SI to the auxiliary battery.

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What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P305F Chevrolet code, it typically requires 1.0 hour of labor. The specific diagnosis time and labor rates at auto repair shops can differ based on factors such as the location, make and model of the vehicle, and even the engine type. It is common for most auto repair shops to charge between $75 and $150 per hour.

What are Code Possible Symptoms?

  • Engine Light ON (or Service Engine Soon Warning Light)

Code P305F Chevrolet Description

This system uses a dual battery configuration which includes the 12 V primary battery and 12 V auxiliary battery. The dual battery control module switches the 12 V primary battery and 12 V auxiliary battery in and out at appropriate times to support vehicle loads and battery charging. During engine crank, the auxiliary battery is switched in to supply voltage to the vehicle loads (except the starter motor which receives voltage from the primary battery) and the ECM monitors the auxiliary battery voltage through the IGN input.

OBDII Code P305F Chevrolet - Dual Battery Control Module Performance - AutoCodes.com
P305F Chevrolet Code - Dual Battery Control Module Performance

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Code P305F Chevrolet comments

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