Why does my Nissan Altima hesitate and shudder when I accelerate?

Short answer: Hesitation, bogging from a stop, or a shudder on a 2019–2024 Altima often points to the CVT. Nissan has a bulletin for 2019–2020 cars with certain CVT codes that can lead to a new control valve or belt-and-pulley set. Get the transmission codes read.

Symptom: Lag or bogging when pulling away, a jerk, or a vibration/shudder while gently accelerating, sometimes with no warning light.

What to check first

1. Have the dealer read the transmission computer for P17F0, P17F1, P0776, P2813 or P0841, even if no light is on.
2. Write down when it happens (cold, from a stop, at certain speeds) and record a video.
3. Ask the dealer about bulletin NTB21-083 on a 2019–2020 car, and check your warranty coverage by VIN.
4. Check when the CVT fluid was last changed.

Likely causes

1. CVT belt slipping or control valve problem. A CVT (continuously variable transmission) uses a steel belt between two pulleys instead of fixed gears. Nissan's bulletin NTB21-083 for 2019–2020 Altimas tells technicians to look for belt slippage and replace the control valve, the belt-and-pulley set, or both when certain codes are stored.
2. CVT software and learning. Some hesitation from a stop can come from how the CVT is programmed. Dealers may check for updates and do a relearn.
3. Fluid condition. Owners commonly change CVT fluid more often than the manual's interval. Old fluid will not fix a damaged belt, but it is worth checking the service history.

What it usually costs

Repairs done under Nissan's bulletin are covered while the car is under warranty. One owner was quoted about $8,000 for a new CVT out of warranty.

Is it safe to keep driving?

A car that won't accelerate when you pull into traffic is dangerous. If it bogs, slips or goes into limp mode, avoid left turns across traffic and highway merges until it's checked.

DIY or shop?

Reading codes is DIY with a scan tool that can see transmission codes. The repair is dealer or transmission-shop work.

Recalls, bulletins and complaints in plain words

• Recalls: NHTSA lists 11 recall(s) for the Nissan Altima in these years, and none match this problem. 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: 49 keyword-matched complaints for Nissan Altima 2019–2024 (of 582 unique complaints queried, NHTSA complaints API by model year, queried 2026-11-08; keywords: CVT, transmission, judder, shudder, hesitation, jerk, slip) (NHTSA returned no data for 2 model-year queries). This counts complaints that mention these words. It is not a defect finding.

What owners report

• In 2020 Nissan Altima on Reddit r/Nissan, a 2020 owner said the car lagged pulling away from lights, then jerked and would not go past about 20 mph. It ran normally after being shut off for five minutes. Replies said it sounded like the CVT and to have the dealer read stored transmission codes.
• In Sluggish Accel & Hesitation on Reddit r/Nissan, a 2019 owner said it hesitated and jerked with no check-engine light. A 2021 owner replied that it bogged badly from a stop and vibrated at 10–45 mph, the dealer said it 'drives as intended,' and they were told a new CVT would be about $8,000.

Quick tip

A dealer saying 'no codes, drives as designed' is common. Keep a log and videos so you have proof if it gets worse before the warranty ends.

Vehicle focus: Nissan Altima sixth generation (2019–2024) with the 2.5L engine and CVT.

Safety / mechanic note

Loss of acceleration in traffic can cause a crash. Verify with a mechanic.