P305F Chevrolet Code - Dual Battery Control Module Performance
Quick Answer
This system uses a dual battery configuration which includes the 12 V primary battery and 12 V auxiliary battery. Common causes include Low battery charge, Faulty Battery, Battery harness is open or shorted. Severity is High - diagnose this code as soon as possible. Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
- What it means
- P305F Chevrolet indicates Dual Battery Control Module Performance.
- Common causes
- Common causes include Low battery charge, Faulty Battery, Battery harness is open or shorted.
- Severity
- High - diagnose this code as soon as possible.
- Can I drive?
- Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
Code P305F Chevrolet Description
What are the Possible Causes of the DTC P305F Chevrolet?
- Low battery charge
- Faulty Battery
- Battery harness is open or shorted
- Battery circuit poor electrical connection
How to Fix the DTC P305F Chevrolet?
Review the 'Possible Causes' above and visually examine the corresponding wiring harness and connectors. Check for damaged components and inspect connector pins for signs of being broken, bent, pushed out, or corroded.
Code Tech Notes
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.
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. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.
Need more information about the P305F Chevrolet code?
Need more information on how to fix the P305F Chevrolet code? Get Access to Factory Service Manuals
Need Help with the Code?
Get the P305F Chevrolet code diagnosed by a professional: Find a repair shop in your area
Frequently Asked Questions about P305F Chevrolet Code
1. What are the common symptoms of OBDII code P305F in a Chevrolet related to the Dual Battery Control Module Performance?
- Common symptoms include issues with battery charging, starting problems, dimming lights, and potential electrical system malfunctions.
2. What are the possible causes of OBDII code P305F in a Chevrolet indicating Dual Battery Control Module Performance issues?
- The code P305F can be triggered by a faulty dual battery control module, wiring issues, battery problems, or issues with the charging system.
3. How can I diagnose the OBDII code P305F in a Chevrolet related to the Dual Battery Control Module Performance?
- Diagnosis involves using a scan tool to read the code, checking the battery voltage, inspecting wiring connections, and testing the dual battery control module for proper operation.
4. Can a DIYer repair OBDII code P305F in a Chevrolet indicating Dual Battery Control Module Performance issues?
- While some basic troubleshooting like checking connections and battery voltage can be done by a DIYer, diagnosing and replacing the dual battery control module may require professional help.
5. Are there any specific repair tips for fixing OBDII code P305F in a Chevrolet related to Dual Battery Control Module Performance?
- Ensure all electrical connections are secure, check the condition of the batteries, and consider having the dual battery control module tested by a qualified technician.
6. How critical is it to address OBDII code P305F in a Chevrolet indicating Dual Battery Control Module Performance issues promptly?
- Ignoring this code can lead to potential problems with the electrical system, battery charging, and starting the vehicle, so it is important to address it promptly.
7. Can a bad battery cause OBDII code P305F in a Chevrolet related to Dual Battery Control Module Performance issues?
- Yes, a failing battery can affect the performance of the dual battery control module and trigger the P305F code, so it's recommended to check the battery condition during diagnosis.
8. Is resetting the OBDII system enough to fix code P305F in a Chevrolet related to Dual Battery Control Module Performance?
- Resetting the system may clear the code temporarily, but if the underlying issue with the dual battery control module persists, the code is likely to return.
9. How much does it typically cost to repair OBDII code P305F in a Chevrolet indicating Dual Battery Control Module Performance issues?
- Repair costs can vary depending on the exact cause of the issue, but it's advisable to budget for diagnostic fees, potential parts replacement, and labor costs.
10. Can driving with OBDII code P305F in a Chevrolet indicating Dual Battery Control Module Performance issues cause further damage?
- Continuing to drive with this code present can lead to more severe electrical problems and potential issues with starting and charging the vehicle, so it's best to address it promptly.
Discuss the causes and fixes for P305F Chevrolet OBDII Code
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There is a factory service bulletin for the following models:
2014-2015 Chevrolet Malibu 2016 Malibu
Here is the information:
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 at G103 (#1 image below).
- Verify the engine harness is not pinched underneath the main battery tray (#2 image below).
- Inspect both main and auxiliary battery cables for being secured.
- Perform the battery inspection/test in SI to the auxiliary battery.
Click here to enlarge image -
Getting code p305f. I've changed the auxiliary battery and still engine light is on and code p305f is still showing up. Now i can't pass an emissions test. Help please.
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Will the check engine light go off automatically or do I need to have it reset?
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You have to fix the problem first, then it may take a few days to rest it self, but I recommend resetting the light with a scanner.
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Had the same code. This was caused by a bad fuse. If you don’t first replace the fuse, you can short out and fry the aux battery and the main battery.
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What model and year is your vehicle? Usually is a problem with the battery and not with the transmission.
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I am having the same issue. My vehicle is a 2014 Malibu LT 2.5 with the auto shut off. Please advise what fuse needs to be checked. I don't want to replace the rear battery if it isn't necessary.
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For your model and year, there is a factory service bulletin that recommend inspecting the "Battery Terminals" and battery ground terminal connection. Make sure the terminals and grounds are free of rust and tight. If terminals are OK, then you may have to replace the Defective Battery Control Module.
Click here to enlarge image -
I have a Malibu limited LTZ 2016. it no get power from dual battery control module
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Hi I have a 2017 chevy impala, my check engine light came back on for the 3rd time. Same code P305F. First time they changed one battery, second time they changed the fuse box. Now I don't know what else to do. What do you recommend ir can be.
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There is a factory service bulletin that may help you diagnose the problem: https://www.autocodes.com/p...
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Please read the information on this bulletin, it may help you diagnose the problem: https://www.autocodes.com/u...
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