B1325: How to Diagnose & Fix — Device / Control Module Power Circuit Voltage Out of Range
4 vehicles · 2 makes · $150-$800 repair
How to diagnose and fix B1325: 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.
Cadillac Lyriq · 2023–2025
The rear camera and surround vision system intermittently displays a black or distorted image when engaging Reverse. The camera feeds may freeze, show the wrong camera angle, or display a "Rear Camera Unavailable" message. The issue is software-related and typically resolves after a vehicle restart.
Common Symptoms
- Black screen when in Reverse
- Distorted camera image
- Rear camera unavailable message
- Surround vision showing wrong angle
- Camera image freezes
How to Fix
Apply the latest OTA software updates. If the issue persists, the dealer can reflash the camera control module. Check for moisture in the rear camera housing — condensation can affect image quality. A hard reset of the vehicle (park, lock, wait 5 minutes) usually restores camera function temporarily.
Sources for this issue (1)
Chevrolet Suburban · 2015–2025
The 2015+ Suburban uses an electronic steering column lock that can malfunction, causing a clicking noise from the steering column, failure to recognize the key fob, or preventing the vehicle from starting. The electronic lock module replaces the traditional key-cylinder lock and communicates with the body control module (BCM) to verify the key fob is present before allowing the engine to start. When the lock module fails, it may click repeatedly without unlocking, or it may not engage at all, leaving the steering unlocked even when the vehicle is off.
Common Symptoms
- Rapid clicking noise from steering column
- Vehicle will not start — "Steering Column Lock" message
- Key fob not detected despite fresh battery
- Steering wheel does not lock when vehicle is off
- Intermittent no-start condition
- Multiple clicks before engine starts
How to Fix
The steering column lock actuator module needs replacement ($150-$400 for parts, $200-$400 labor). The module is located inside the steering column and requires partial disassembly to access. A scan tool is needed to program the new module to the BCM after installation. In some cases, a BCM software update at the dealer resolves the clicking without hardware replacement. If the vehicle will not start due to a failed lock module, a tow to the dealer is required — there is no manual override.
Call to confirm they can assess your vehicle and perform the stated work. Search results do not confirm qualification, eligibility or coverage.
Sources for this issue (1)
Chevrolet Bolt EV · 2017–2023
The Bolt EV is never fully powered down; modules continue to wake for telematics, charge scheduling and pack maintenance, and the DC-DC converter is supposed to top the 12V accessory battery from the traction pack on a periodic wake cycle. Owners across chevybolt.org and mychevybolt.com report that cycle failing or being outrun by parasitic draw, leaving a flat 12V after as little as three days parked. Reports cluster on cars that sat on dealer lots for months (which permanently degrades the 12V), on cars whose top-up algorithm becomes less aggressive when traction pack state of charge is low, and on cars with a genuine parasitic draw where the drain happens overnight but never during the day. The consequence is worse than on a gas car: with a dead 12V the Bolt will not power up, will not accept a charge, and the charge port latch stays locked with the cable trapped in the port. Owners report repeat failures - one 2021 car died five times, another killed a brand new battery within a month.
Common Symptoms
- Car completely dead - no dash, no power button response, no door unlock
- Dead 12V battery after only a few days parked
- Battery drains overnight but not while parked during the day
- Cannot start a charge session even though the traction pack has charge
- Charge cable locked in the port and will not release
- Repeat 12V battery failures within months of replacement
- Multiple module warning lights after a jump start
How to Fix
First confirm the 12V battery itself: a lot-aged or repeatedly deep-cycled AGM must be replaced, not merely recharged. Then measure parasitic draw with the car asleep for a full 45-60 minute module shutdown period; a healthy Bolt settles to a low milliamp draw. Persistent drains have been traced to modules failing to sleep and to a DC-DC/APM top-up cycle that is not running - both warrant dealer diagnosis, and the charging and battery control modules fall under the EV component warranty. Practical mitigation: keep traction pack state of charge above roughly 30%, plug in when parked long-term, and use a 12V maintainer if the car sits for weeks. Learn the emergency manual charge-port release before you need it.
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.
Sources for this issue (4)
Chevrolet Trax · 2024–2025
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B1325 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 B1325 mean?
B1325 stands for "Device / Control Module Power Circuit Voltage Out of Range." This is a manufacturer-specific body code (common on GM and others) indicating a control module detected its supply voltage outside the acceptable range, typically too low or too high. Modules need a stable voltage (roughly within battery/charging norms); readings that drop too low or spike too high trigger this code. The most frequent real-world cause is a weak battery or charging problem, especially in cold weather. Symptoms depend on the affected module, and the charging system and battery should be checked first.
What are the most common causes of B1325?
The most common causes of B1325 are: Weak, discharged, or failing battery, Charging system/alternator fault (over- or under-charging), Corroded or loose battery terminals and grounds, Poor power or ground connection to the module, Damaged wiring in the module power circuit, High resistance connections causing voltage drop. The specific cause varies by vehicle.
How much does it cost to fix B1325?
Repair costs for B1325 range from $150 to $800, depending on the vehicle and root cause.
Which vehicles are affected by B1325?
Au7o has documented B1325 across 4 vehicle models from 2 manufacturers: Cadillac, Chevrolet.
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Content compiled with AI assistance using NHTSA complaints, TSBs, and owner reports. May contain errors. Always verify with your vehicle's service manual.