B210D on Jeep: How to Diagnose & Fix
Manufacturer-Specific Body Code (low battery voltage / starter or relay condition)
1 Jeep model · 1 documented issue · 1 critical · $200-$1,800 repair
B210D on Jeep by model: symptoms, diagnosis and fix
Owner reports and NHTSA complaints describe repeated dead 12V batteries and no-start conditions on Grand Wagoneer, often after sitting overnight or a few days. The pattern is consistent with parasitic draw from modules not going to sleep (commonly telematics/infotainment-related controllers), leading to low voltage and cascading network faults.
Common Symptoms
- No-crank/no-start after sitting
- Multiple warning lights after jump start
- Remote start inoperative
- Battery voltage low message
- Repeated need for jump starts or battery replacement
How to Fix
Perform a parasitic draw test with an ammeter and use a scan tool to identify modules staying awake; update software per applicable Stellantis service bulletins and replace the failing module if it will not sleep. Replace the 12V battery if it has been deeply discharged multiple times and verify charging system output.
What you need to diagnose it
The fix here starts with a test, not a part — which repair you need depends on what the test finds.This issue involves U codes, which a basic engine-code reader cannot see.At least one code uses a manufacturer-specific format. No scanner recommendation is shown because family-level coverage cannot prove it can read that code.
UNI-T UT210E Low-Current DC Clamp Meter
1 mA resolution on the 2 A range — a 0.1 A meter reads a 50 mA drain as zero
$40–$70View
As an Amazon Associate, we earn from qualifying purchases. Prices are approximate and may vary.
Testing and isolating the fault is DIY work. Replacing or reprogramming a control module is not — most are VIN-programmed, so a new one does nothing until a shop codes it to your car. Check for an open recall or service bulletin before buying anything.
What you need to fix it
Only diagnosis- and fitment-reviewed repair parts are linked here.
- Duralast Platinum H7-AGM Group 94R main batteryOEMDuralast H7-AGM / SKU 319458
Confirm installed group, CCA, vent, terminal layout and VIN bec
- Duralast Platinum H8-AGM Group 49 main batteryOEMDuralast H8-AGM / SKU 319459
Do not substitute it for an installed H7 without confirming tray/
- Duralast Platinum AUX14 Group 400 AGM auxiliary batteryOEMDuralast AUX14 / SKU 755654
It is not the main battery; verify VIN/equipment and the installed auxiliary battery label
As an Amazon Associate, we earn from qualifying purchases; other part links may also earn au7o a commission. Confirm fitment by VIN before buying.
B210D 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 B210D mean on a Jeep?
B210D stands for "Manufacturer-Specific Body Code (low battery voltage / starter or relay condition)." B210D is a manufacturer-specific body code whose meaning varies by automaker. On Dodge/Chrysler it is commonly reported as a low battery-voltage condition seen by a body module, while some other references list a starter or relay state. It generally indicates a power-supply or control-circuit issue detected by a body-domain module rather than a mechanical engine fault. Confirm the exact definition with make-specific service data before repair. On Jeep it is documented across 1 model: Grand Wagoneer.
What are the most common causes of B210D?
The most common causes of B210D are: Low or weak battery / undercharged system, Failing alternator or charging-system fault, Corroded or loose battery terminals and grounds, Voltage drop in body-module power feeds, Stuck or faulty relay (on makes using that definition), Faulty body control module. The specific cause varies by vehicle.
How much does it cost to fix B210D on a Jeep?
Published repair estimates on Jeep range from $200 to $1,800 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 B210D on a different make?
View B210D 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.