Why won't my Subaru Crosstrek Plug-in Hybrid go into Ready?

Short answer: It's almost always the 12V battery. On this car it's tied to recall 23V080000: a harness terminal that charges the 12V can corrode and break, so the battery quietly dies. Jump it, run your VIN, and get the recall repair done for free. If a new battery keeps dying after that, ask for a drain test.

Symptom: You press start, the dash lights flash or blink, and the car never shows Ready. Sometimes nothing happens at all.

What to check first

1. Run your VIN at nhtsa.gov/recalls for 23V080000.
2. Jump the 12V per the owner's manual.
3. Have the 12V load-tested.
4. Mention short, EV-only trips to the dealer.
5. If the battery was already replaced, ask whether the harness repair was done too.
6. Ask for a drain test if it keeps happening.

Likely causes

1. 12V battery not being charged (harness recall). Recall 23V080000 says the harness terminal that sends power from the converter to the 12V battery may corrode and break, so the 12V stops charging. The 12V battery is the small battery that powers the computers, locks and screens. EVs and plug-in hybrids still need it to wake up, even with a full main battery.
2. Weak or worn 12V battery. Owners who drive mostly on electric power and take short trips say the 12V runs down. One owner's dealer replaced it.
3. Parasitic drain or software. If a new battery dies again, ask for a drain test and software check.

What it usually costs

Recall repairs are free. Owners didn't post battery prices.

Is it safe to keep driving?

If it reaches Ready after a jump, it can be driven, but get the recall done soon. Owners got stranded without warning.

DIY or shop?

Jumping and testing the 12V is DIY. The harness recall repair is dealer work.

Recalls, bulletins and complaints in plain words

• Related recall: NHTSA lists 23V080000 (2019-2022 Crosstrek Hybrid: the harness terminal that carries low-voltage power from the converter to the 12V battery may corrode and break, so the 12V battery stops charging). NHTSA's recall lookup returned no data for 2023. Check your VIN at nhtsa.gov/recalls. If your car is part of a recall, the dealer fixes it for free.
• Plain words: The complaint count below shows how often owners reported problems that mention these words to NHTSA. A count is not proof of a defect.
• NHTSA complaints: 1 keyword-matched complaints for Subaru Crosstrek Hybrid (plug-in) 2019–2023 (of 1 unique complaints queried, NHTSA complaints API by model year, queried 2026-11-02; keywords: 12v, 12 volt, battery, won t start, no start, ready, dead, jump) (NHTSA returned no data for 1 model-year queries). This counts complaints that mention these words. It is not a defect finding.

What owners report

• In 12 volts issue on the subaru crosstreck 2020 plugin model on Reddit r/Subaru_Crosstrek, a 2020 Crosstrek plug-in owner who drives short trips almost all in EV mode said the 12V battery doesn't charge and left them stuck three times in one week during a snowstorm, with no low-battery warning beforehand.
• In A much loved 2019 Subaru Crosstrek Plug in Hybrid that won’t ‘start’. on Reddit r/Crosstrek, a 2019 Crosstrek plug-in owner pressed start and the warning lights blinked but the car never reached Ready. The dealer had replaced the battery, and the owner suspected the problem began after a recall was done.

Quick tip

Check the recall before buying another battery. That's the documented cause on this model.

Vehicle focus: Subaru Crosstrek Hybrid (plug-in), 2019-2023.

Safety / mechanic note

Being stranded in snow is dangerous. Keep a jump pack in the car until the recall is done. Verify with a mechanic.