B26F2 on Infiniti: How to Diagnose & Fix
Ignition Relay Stuck ON (manufacturer-specific)
1 Infiniti model · 1 documented issue · $200-$1,200 repair
B26F2 on Infiniti by model: symptoms, diagnosis and fix
Owners of the redesigned QX60 have reported dead batteries, repeated jump-starts, and no-start conditions after the vehicle sits overnight or for a few days. Complaints and forum reports point to parasitic draw from modules that do not go to sleep properly, including telematics and infotainment-related systems, rather than a simple worn battery in many low-mileage cases. The problem is especially frustrating because battery replacement alone may not permanently fix it.
Common Symptoms
- Dead battery after sitting overnight or a few days
- Repeated need for jump-starts
- No crank or clicking on startup
- Battery replaced but problem returns
How to Fix
Perform a proper parasitic draw test after all modules should be asleep, then isolate the circuit causing excess current draw. Check for TSB/software updates for telematics/AV modules, test battery health, and inspect charging system output; some vehicles need module reprogramming, while others require battery replacement after repeated deep discharge damage. Document draw readings before replacing parts.
What you need to fix it
Only diagnosis- and fitment-reviewed repair parts are linked here.
- Duralast Platinum Group 48/H6 AGM batteryOEMAutoZone 319460 / H6-AGM
Confirmed failed-battery replacement branch Fitment/availability: H6-AGM, Group 48, 760 CCA, 120-minute reserve, top-right positive; AutoZone lists it as vehicle-specific for 2022 QX60 and supporting catalogs show the H6 envelope for 202…
- NOCO GENIUS2 2-amp smart charger and maintainerOEMNOCO GENIUS2 / AutoZone 606158
Optional interim or long-storage maintenance branch Fitment/availability: GENIUS2 supports 12V flooded, EFB and AGM maintenance modes. Select the installed chemistry and connect at the QX60-approved points using the exact manual precauti…
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
- TipIf the vehicle sits often, a smart maintainer can prevent deep discharge while the root cause is being diagnosed.
Sources for this issue (1)
B26F2 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 B26F2 mean on a Infiniti?
B26F2 stands for "Ignition Relay Stuck ON (manufacturer-specific)." B26F2 is a manufacturer-specific body code, documented on Nissan/Infiniti vehicles as the ignition relay being stuck in the ON position. The relay (typically inside the IPDM power-distribution module) supplies power to ignition circuits, and the module sets this code when it detects the relay contacts remaining closed when they should open. It can lead to circuits remaining powered and potential battery drain or no-crank/no-start anomalies. On Infiniti it is documented across 1 model: QX60.
What are the most common causes of B26F2?
The most common causes of B26F2 are: Stuck ignition relay inside the IPDM/power distribution module, Failed IPDM (intelligent power distribution module), Wiring short keeping the relay energized, Corroded connector at the IPDM, BCM/IPDM communication or control fault, Internal module driver failure. The specific cause varies by vehicle.
How much does it cost to fix B26F2 on a Infiniti?
Published repair estimates on Infiniti range from $200 to $1,200 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 B26F2 on a different make?
View B26F2 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.