Battery replacement restored short-term capacity but did not address a module that kept waking after shutdown.
Why this matters
The value of this case is the order of evidence and the verification step. The same symptom on another vehicle may have a different cause.
Evidence to capture first
- Old and new battery test results
- Key-off current timeline
- Sleep events
- Branch contribution
A disciplined path
- Charge and test the new battery
- Measure current through a full sleep cycle
- Correlate recurrent spikes
- Repair the wake-up source and retest battery health
Decision point
Replacing the discharged battery treated the consequence, not the excessive key-off load.
Source desk
Use current model-specific service information for specifications, connector locations, disabling procedures, and tightening values. The following public resources support the broader safety or system context used in this guide.
KEEP EXPLORING
Related guides
Failed Repair: P0420 Returned After Converter Replacement
The replacement converter did not solve an upstream mixture and oil-consumption condition that continued to damage catalyst performance.
Read guideFailed Repair: A/C Recharged Without Finding the Leak
Cooling returned briefly after adding refrigerant, then faded because charge mass was never measured and the leak was not repaired.
Read guide
Failed Repair: ABS Sensor Replaced, Tone Ring Still Damaged
The code location led to sensor replacement, but a cracked or contaminated encoder continued to distort the signal once per wheel revolution.
Read guide