B1A13 on Dodge: How to Diagnose & Fix
Battery Voltage Low (Body Module)
1 Dodge model · 1 documented issue · 1 critical · $100-$800 repair
B1A13 on Dodge by model: symptoms, diagnosis and fix
The Dodge Magnum suffers from widespread electrical problems centered around the TIPM (Totally Integrated Power Module) and the steering column control module (clockspring). Symptoms include dash lights flickering or going completely dark while driving, headlights cutting out at night, loss of turn signals, wipers, horn, and cruise control all at once. The steering column module failure is particularly dangerous as it can disable multiple safety systems simultaneously. The TIPM relay failures can cause no-start conditions, fuel pump cutouts, and random electrical gremlins throughout the vehicle.
Common Symptoms
- Dashboard lights flickering or going completely dark while driving
- Headlights cutting out intermittently, especially at night
- Loss of turn signals, wipers, horn, and cruise control simultaneously
- Vehicle cranks but will not start intermittently
- Fuel pump stops running randomly while driving
- Warning lights illuminating on dash without clear cause
How to Fix
For steering column module failure (loss of wipers, horn, turn signals, cruise control simultaneously), replace the clockspring assembly ($150-$300 part, $200-$400 labor). For TIPM-related issues, have the relays tested — individual relay replacement is sometimes possible ($50-$150), but full TIPM replacement runs $400-$800 for the module plus programming. For flickering dash lights, check the instrument cluster ground connections and the body harness ground behind the left kick panel.
What you need to fix it
Only diagnosis- and fitment-reviewed repair parts are linked here.
- Mopar 56049795AE clockspring / steering-column control module
Replace when steering-wheel functions and clockspring/module testing isolate this assembly Fitment: Product fitment includes Magnum configurations; verify VIN/options and airbag procedure Live OEM direct-product page when checked
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Sources for this issue (1)
B1A13 code reference
General diagnostic-code context. The code alone does not confirm a cause for your vehicle; use the applicable issue card and its sources.
Frequently asked questions
What does B1A13 mean on a Dodge?
B1A13 stands for "Battery Voltage Low (Body Module)." This is a body-network code indicating that a body control module has detected battery (system) voltage that is too low for reliable operation. Body modules need a stable voltage to run features like lighting, locks, and other electrical accessories, so when the supply drops below a set threshold the module logs this fault. It usually points to a charging or battery problem rather than a fault in the module itself, and it may appear alongside other low-voltage codes from multiple modules. Common triggers include a weak battery, a charging system fault, or poor electrical connections. On Dodge it is documented across 1 model: Magnum.
What are the most common causes of B1A13?
The most common causes of B1A13 are: Weak, aged, or failing battery, Faulty alternator or charging system, Loose or corroded battery terminals or ground connections, Excessive parasitic battery drain, Damaged or high-resistance power supply wiring to the module, Worn or loose serpentine/accessory belt slipping the alternator, Faulty body control module power input circuit. The specific cause varies by vehicle.
How much does it cost to fix B1A13 on a Dodge?
Published repair estimates on Dodge range from $100 to $800 depending on the model and root cause. If an issue mentions a recall or campaign, check your VIN with the manufacturer or NHTSA and confirm eligibility and coverage with a dealer.
Looking for B1A13 on a different make?
View B1A13 across all makes →Content compiled with AI assistance using NHTSA complaints, TSBs, and owner reports. May contain errors. Always verify with your vehicle's service manual.