B2601: How to Diagnose & Fix — Body Control Circuit Fault (manufacturer-specific)
2 vehicles · 1 makes · $180-$1,200 repair
How to diagnose and fix B2601: most-reported vehicles
Ranked by owner reports. Each card gives the symptoms, how to confirm the cause, the fix, parts and sources for that vehicle.
Nissan Murano · 2021–2024
A recurring owner complaint on newer Nissan crossovers, including Murano, is a dead battery after sitting overnight or for a few days despite the battery testing good initially. Reports often point to parasitic draw from telematics, AV control, or body control modules that fail to enter sleep mode, sometimes accompanied by app connectivity glitches or infotainment oddities. The issue can be intermittent, making it difficult to catch unless a proper draw test is performed after module timeout.
Common Symptoms
- dead battery after sitting
- slow cranking or no-start
- needs jump start repeatedly
- battery tests weak prematurely
- infotainment or NissanConnect glitches
How to Fix
Start with battery state-of-health and charging-system checks, then perform a parasitic draw test with the vehicle fully asleep. If draw remains excessive, isolate the circuit by pulling fuses and checking telematics, AV, and BCM-related branches; software updates, module resets, or replacement of the offending module may be required. Replacing the battery alone often provides only temporary relief if the root draw remains.
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.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.
- Genuine Nissan Group H5/L2 battery 999M1-NCH5C
Confirm VIN, dimensions, terminals, CCA and current installed group.
- NOCO GENIUS5 5-amp smart charger and maintainer
Universal 6V/12V charger for supported lead-acid/AGM or lithium modes. Select the mode matching the installed battery and follow safe connection/ventilation instructions; not a no-start booster or draw repair.
As an Amazon Associate, we earn from qualifying purchases; other part links may also earn au7o a commission. Confirm fitment by VIN before buying.
Owner tips & cautions
- TipAsk for a true parasitic draw test after all modules time out; many quick battery tests miss the actual problem.
- TipIf the vehicle sits for long periods, a smart maintainer can prevent deep discharge while diagnosis is pending.
Sources for this issue (1)
Nissan Titan · 2020–2024
A recurring owner complaint on newer Titans is parasitic battery drain after sitting overnight or for several days, leading to slow cranking or a complete no-start. Reports frequently point to the infotainment, telematics, or body control network not going to sleep properly, especially after software glitches, accessory installation, or repeated short-trip use. Some owners replace the battery only to have the drain return until the underlying module issue is addressed.
Common Symptoms
- dead battery after sitting
- slow crank
- click no-start
- battery repeatedly needs jump-starts
- new battery goes dead again
- intermittent infotainment glitches
How to Fix
Proper diagnosis requires a parasitic draw test after all modules should be asleep, along with checking for software updates and isolating the draw by pulling fuses or monitoring current with a clamp meter. Repairs may include battery replacement if damaged by repeated deep discharge, infotainment or telematics module software updates, and in some cases module replacement. Charging system output and battery state of health should be verified before condemning control units.
Owner tips & cautions
- TipUse a low-amp clamp meter or parasitic draw tester instead of guessing with repeated battery replacements.
- TipIf the truck sits often, owners suggest a smart maintainer after confirming there is no abnormal draw.
Find B2601 by make
Browse every documented model and issue for your make.
B2601 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 B2601 mean?
B2601 stands for "Body Control Circuit Fault (manufacturer-specific)." This is a body code whose exact meaning is manufacturer-specific and varies widely by make. On some GM vehicles it indicates the daytime running lamp (DRL) relay control circuit is shorted to ground, while on Nissan/Infiniti it relates to a shift-position signal mismatch seen by the body control module, and on other vehicles it refers to a door latch/closing signal fault. In general it points to a circuit or signal problem detected by a body-system module, so the correct diagnosis depends on the specific vehicle's service information.
What are the most common causes of B2601?
The most common causes of B2601 are: Shorted/grounded control circuit (e.g., DRL relay on some GM), Wiring or connector damage and corrosion, Faulty relay, switch, or sensor in the affected circuit, Signal mismatch between modules (make-dependent), Faulty body control module, Make-specific component fault per service manual. The specific cause varies by vehicle.
How much does it cost to fix B2601?
Repair costs for B2601 range from $180 to $1,200, depending on the vehicle and root cause.
Which vehicles are affected by B2601?
Au7o has documented B2601 across 2 vehicle models from 1 manufacturers: Nissan.
Content compiled with AI assistance using NHTSA complaints, TSBs, and owner reports. May contain errors. Always verify with your vehicle's service manual.