The largest online repair guide library for every car

About us
Contact support
FAQ
Sign up
Sign in

2022 Envision Preferred - Mysterious Battery Drain

0

Mike T. · rep 0 · May 25, 2:48 AM · 1 replies · solved · Question

Vehicle: 2022 Buick Envision Preferred

Hello fellow Buick owners,

I'm having a really annoying problem with my 2022 Buick Envision Preferred. The battery keeps dying, sometimes overnight, even if I've driven it recently. I've had to jump-start it several times now, and it's getting old fast. It only has about 30,000 miles on it.

I've checked to make sure no lights are left on, and nothing seems to be plugged into the outlets. It feels like there's a parasitic draw somewhere, but I can't pinpoint it. Has anyone with a newer Envision experienced a similar battery drain issue? Is this a known problem for this model year?

I'm thinking of taking it to the dealer, but I'd like to understand what might be causing it first. Any suggestions on what could be draining the battery or what to ask the service department?

✓ Accepted solution

ClearTheCode Admin

ClearTheCode Team · rep 0 · May 25, 2:48 AM

0

ClearTheCode admin answer:

A mysterious battery drain, or parasitic draw, on a relatively new vehicle like your 2022 Buick Envision is frustrating. This indicates that something in the vehicle is drawing power even when the ignition is off, slowly depleting the battery.

Common Causes of Parasitic Battery Drain:

  • Aftermarket Accessories: Anything installed after the factory (e.g., remote start, alarm, dash cam) can sometimes be wired incorrectly and cause a drain.
  • Faulty Modules: Control modules (e.g., BCM - Body Control Module, infotainment module, OnStar module) that fail to 'go to sleep' after the vehicle is shut off can continuously draw power.
  • Stuck Relays: A relay that remains stuck in the 'on' position can keep a circuit energized.
  • Interior/Trunk Lights: Even if you check, a glove box light or trunk light that isn't turning off completely can cause a slow drain.
  • Faulty Alternator Diode: A bad diode in the alternator can allow current to flow back to the alternator when the engine is off.
  • Short Circuits: A short in a wiring harness or component can create an unintended path for current flow.

When to See a Shop & What to Expect:

  1. Battery Health Check: The first step is to confirm the battery itself is healthy. A shop will test the battery's cold cranking amps (CCA) and overall charge capacity.
  2. Alternator Output Test: They will test the alternator to ensure it's properly charging the battery when the engine is running.
  3. Parasitic Draw Test: This is a specialized test where a multimeter is connected in series with the battery to measure the current draw when the vehicle is off and all systems are supposed to be asleep. The technician will then systematically pull fuses to isolate the circuit causing the excessive draw.
  4. Scan for Diagnostic Trouble Codes (DTCs): While there isn't a direct OBD code for parasitic draw, a scan tool can reveal codes related to modules that are not communicating or are staying awake (e.g., U0100 - Lost Communication with ECM/PCM, U0140 - Lost Communication with BCM), which can point to a faulty module.
  5. Visual Inspection: They'll inspect wiring harnesses for damage or corrosion.

Diagnosing parasitic draws can be time-consuming and requires specialized knowledge and tools. It's highly recommended to take your Envision to a Buick dealership or a trusted automotive electrical specialist.

Menu

Help & account