Why does my Chevy Trax lose power or stall in cold weather?

Short answer: The 1.4L turbo Trax (shared with Encore/Cruze/Sonic in this era) can run terribly in deep cold: sputtering, stalling, limp power, then improving after it warms up. GM’s guidance points to ice and oil contamination in the PCV/crankcase vent path, charge-air cooler, and bypass valve — not always a bad turbo. Trax Forum owners report codes like P0299, P0096, and P1101 and talk about draining the intercooler and cleaning sensors.

Symptom: Cold-morning backfire/sputter/stall that clears after a few minutes of driving, reduced power on the highway in winter, or boost-related codes after a cold snap.

What to check first

1. Scan and save all codes (P0299, P0236, P00C7, P0096, P1101 and friends).
2. Ask the dealer about GM cold-weather icing bulletins / special coverage for the 1.4L LUV (heated PCV / CAC updates on some builds).
3. Check for oil/water in the charge-air cooler — owners siphon or carefully drain the low point.
4. Inspect PCV hoses and the cam cover vent path for ice or sludge.
5. Do not throw a turbo at it first — GM’s tech notes often say clean/replace bypass valve and intake parts before condemning the turbo.

Likely causes

1. Ice in PCV / crankcase vent and intake. GM TechLink-style guidance shared on Trax Forum describes ice blocking the crankcase vent and PCV passages in extreme cold.
2. Charge-air cooler water/oil contamination. Owners link cold misfires to water pooling in the intercooler and contaminating the boost/IAT sensor (P0096).
3. Contaminated charge-air bypass valve. GM instructs cleaning or replacing the bypass valve and sometimes the intake manifold when oily moisture is found.

What it usually costs

Dealer diagnosis under warranty/special coverage when eligible. Out of pocket, expect cleaning/sensor work in the low hundreds or intake/bypass parts higher — get a written estimate. A turbo replacement is usually the wrong first move per GM notes.

Is it safe to keep driving?

Stalling on a cold morning is a crash risk. If it dies in traffic, get clear and warm the car carefully. Verify with a mechanic.

DIY or shop?

DIY for code reads and careful intercooler draining. Dealer for heated PCV/CAC updates and intake work.

Recalls, bulletins and complaints in plain words

• GM issued technical guidance / special coverage paths for extreme-cold performance on 1.4L Trax/Encore (for example bulletin families around 16-NA-405 and related coverage). Confirm what applies to your VIN — it is not always a free open recall.
• NHTSA complaints: 243 keyword-matched complaints for Chevrolet Trax 2015–2018 (of 432 unique complaints queried, NHTSA complaints API by model year, queried 2026-10-19; keywords: related).

What owners report

• In Cold weather reduced power issue II, members shared GM’s cold-weather icing explanation for the 1.4L Trax (PCV ice, CAC ice, bypass valve contamination) and codes such as P0299 and P0236; owners asked whether repairs were covered.
• In 2015 Trax runs like crud when cold, a 2015 owner described stalling at −4°F that cleared after several blocks, with codes including P0171, P0096, and P1101; replies pointed to water in the intercooler and the boost/IAT sensor.

My take

My advice as a former lot tech: a Trax that only acts up below freezing gets an icing and PCV look before I sell anyone a turbo. Warm-car test drives hide this problem.

Vehicle focus: 2015–2018 Chevrolet Trax with the 1.4L turbo (LUV) in cold climates.

Safety / mechanic note

If it stalls in traffic, prioritize getting out of the lane over restarting in place. Verify with a mechanic.