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Honda · Known Issues

2025 Honda Accord Problems: 4 Known Issues

2025 model year · 1,603+ owner reports · Updated September 2026

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Issue summary

According to Au7o's analysis of 1,603+ owner reports, the 2025 Honda Accord has 4 documented known issues, with 2 rated critical. The most serious are Hybrid Inverter/Power Control Unit (PCU) Cooling System Failure ($100-$6,000 repair) and Hybrid Power Loss While Driving ($0-$0 repair). The most commonly reported issue is Hybrid Inverter/Power Control Unit (PCU) Cooling System Failure with 523 owner reports. Across all issues with published estimates, repair costs range from $100 to $6,000. DIY maintenance guides at au7o.io.

In This Article

  • Accord Electrical1
  • Accord Transmission1
  • Accord Safety/Recalls1
  • Accord Engine1
  • Recalls9
  • FAQ
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In This Article

  • Electrical1
  • Transmission1
  • Safety/Recalls1
  • Engine1
  • Recalls9

All 4 Known Issues

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ALL YEARS202520242023202220212020201920182017201620152014201320122011201020092008200720062005200420032002200120001999199819971996199519941993199219911990
Community reported
523 owners

On the 2018-2025 Honda Accord 2.0L Hybrid, the 10th and 11th generation Accord Hybrid uses a dedicated liquid-cooled Power Control Unit (PCU/inverter) that manages power flow between the gas engine, electric motors, and high-voltage battery. The PCU cooling system uses a separate small coolant reservoir (distinct from engine coolant) that is often overlooked during maintenance. PCU coolant degradation causes overheating, triggering power reduction/limp mode and IMA system warnings. Honda issued TSB 21-093 addressing PCU coolant replacement intervals. In severe cases, PCU failure leads to complete loss of hybrid function requiring replacement ($3,000-6,000 for PCU module).

Common Symptoms

  • Hybrid System Indicator (IMA) warning light
  • Power reduction or limp mode activation
  • Reduced fuel economy (10-15% drop)
  • Vehicle overheating indicator combined with IMA warning
  • Loss of electric motor assist
  • Check engine light with hybrid system codes (P1A09, P1AAB)
  • PCU coolant reservoir level low

How to Fix

Locate and check PCU coolant reservoir (typically near battery/inverter box under hood - separate from engine coolant). Replace PCU coolant with Honda Type 2 Long Life Coolant (Blue) at Honda-specified intervals (every 5 years or 100,000 miles per TSB 21-093). Independent Accord Hybrid forums recommend every 3 years for preventive maintenance. PCU coolant flush: $100-200 at shop, $30-50 DIY. Failed PCU: $3,000-6,000 dealer replacement. Check for hybrid-specific powertrain warranty extension in your state (CARB states: 10yr/150k for high-voltage components).

Typical repair cost:$100 - $6,000

Research This Issue

Based on 523 owner reports

GoogleRedditYouTubeNHTSA
Community Reported
High ConfidenceVerified523 owner reportsLast reported by owners Jan 2025Reviewed Feb 2026
Community reported
345 owners

On the 2023-2025 Honda Accord, due to a software error, the integrated control module (ICM) central processing unit (CPU) may reset while driving, causing a complete loss of drive power. The supplier did not fully understand component specifications when developing fault detection software, leading to false CPU error detection. Honda recalled over 256,000 Accord Hybrids for this issue.

Common Symptoms

  • Sudden loss of drive power while driving
  • Engine stalling at highway speeds
  • Warning lights on dashboard
  • Vehicle unable to accelerate
  • Potential for vehicle to coast to stop

How to Fix

ICM CPU software reprogramming at Honda dealership (free under recall). Schedule appointment immediately if affected.

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Typical repair cost:$0 - $0

Research This Issue

Based on 345 owner reports

GoogleRedditYouTubeNHTSA
Community Reported
High Confidence345 owner reportsLast reported by owners Feb 2024Reviewed Feb 2026
Community reported
423 owners

On the 2023-2025 Honda Accord, the 11th generation Accord (2023+) introduced the updated Honda Sensing 360 system with front radar, front camera, and side cameras. Multiple software bugs affect the system: (1) Lane Centering Assist (LCA) makes abrupt steering corrections, especially near construction zones and highway lane markings. (2) Adaptive Cruise Control (ACC) brakes unnecessarily at overpasses, parked cars, and vehicles in adjacent lanes. (3) The Traffic Jam Assist cuts out unexpectedly. Honda has released several OTA (over-the-air) software updates addressing these issues. Drive Accord members recommend checking for pending software updates at every dealer visit. NHTSA has received complaints relating to false frontal collision warnings.

This issue also affects: Honda Civic, Honda CR-V

Common Symptoms

  • Lane Centering Assist making sudden steering jerks
  • ACC braking for stationary objects in adjacent lanes or overpasses
  • Traffic Jam Assist disengaging unexpectedly
  • FCW (Forward Collision Warning) activating without cause
  • Lane Departure Warning activating in clear lane
  • Honda Sensing warning light illuminated

How to Fix

Visit Honda dealer or check Honda Owners app for available OTA software updates to Honda Sensing system - Honda has released multiple calibration updates improving system behavior. Ensure forward camera is clean and not obstructed. Windshield replacement on 11th gen Accord REQUIRES Honda Sensing camera recalibration ($150-300) - non-OEM windshields can cause persistent false warnings. For persistent issues after updates, radar sensor recalibration may be needed ($200-400). File NHTSA complaint at nhtsa.gov for false AEB events to support recall investigation.

Typical repair cost:$0 - $400

Research This Issue

Based on 423 owner reports

GoogleRedditYouTubeNHTSA
Community Reported
High ConfidenceVerified423 owner reportsLast reported by owners Feb 2025Reviewed Feb 2026
Community reported
312 owners

On the 2023-2025 Honda Accord 2.0T, the 11th generation Accord 2.0T (K20C4 engine) inherited the direct-injection carbon buildup issue from the 10th gen. Without port injection to clean intake valves, carbon deposits accumulate on the intake valves and ports starting at 30,000-50,000 miles. The 2.0T engine is more susceptible than the 1.5T because it runs higher combustion temperatures. Additionally, the 11th gen Accord 2.0T reports an unusual idle vibration at cold start that owners describe as a "diesel-like" clatter lasting 2-5 seconds. Honda TSB 23-055 addresses this with an ECM calibration update that adjusts cold start timing.

This issue also affects: Acura ILX, Acura Integra, Acura MDX

Common Symptoms

  • Rough idle or stumbling at cold start
  • Diesel-like rattling or clatter for first few seconds of cold start
  • Hesitation or stumbling under light throttle application
  • Reduced fuel economy after 30,000+ miles
  • Occasional misfires on cold mornings (P0300-P0304)
  • Hard cold starts that require extended cranking

How to Fix

For cold start clatter: Visit Honda dealer for ECM calibration update per TSB 23-055 (free under warranty). For carbon buildup: Walnut blast cleaning every 40,000-60,000 miles ($300-500 independent shop). Use top-tier gasoline (Shell V-Power, Chevron, Costco Premium) which contains higher detergent additives. CRC GDI IVD Intake Valve Cleaner (#05319) spray treatment every 10,000 miles slows buildup. Oil catch can installation ($80-150) reduces PCV oil vapor contribution to carbon.

Typical repair cost:$0 - $500

Research This Issue

Based on 312 owner reports

GoogleRedditYouTubeNHTSA
Community Reported
High ConfidenceVerified312 owner reportsLast reported by owners Feb 2025Reviewed Feb 2026
NHTSA Recalls9 recalls

SEAT BELTS:FRONT

Honda (American Honda Motor Co.) is recalling certain 2023-2024 Accord and HR-V vehicles. The front seat belt pretensioners may be missing the rivet that secures the quick connector and wire plate. As such, these vehicles fail to comply with the requirements of Federal Motor Vehicle Safety Standard numbers 208, "Occupant Crash Protection," 209, "Seat Belt Assembles," and 210, "Seat Belt Assembly Anchorages."

Campaign #23V78200021/11/2023

FUEL SYSTEM, GASOLINE:DELIVERY:FUEL PUMP

Honda (American Honda Motor Co.) is recalling certain 2023-2024 Honda Accord, Accord Hybrid, 2023-2025 Honda CR-V Hybrid, and 2025 Honda Civic and Civic Hybrid vehicles. The high-pressure fuel pump may crack and leak fuel.

Campaign #24V76300014/10/2024

SEATS:CRITICAL FASTENERS

Honda (American Honda Motor Co.) is recalling certain 2023-2024 Honda Accord, Accord Hybrid, Civic Sedan, Civic Hatchback, Pilot, and 2024 HR-V, Acura Integra and Acura Integra Type S vehicles. The driver's seat cushion frame may not have been tightened properly, which can result in an unsecured seat. As such, these vehicles fail to comply with the requirements of Federal Motor Vehicle Safety Standard number 207, "Seating Systems."

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Other Honda Models

Honda Civic74Honda CR-V64Honda Pilot42Honda Odyssey25Honda HR-V24Honda Passport21

Frequently Asked Questions

What are the most common Honda Accord problems?

According to Au7o's analysis of 1,603+ owner reports, the 2025 Honda Accord has 4 documented issues. The most frequently reported are: Hybrid Inverter/Power Control Unit (PCU) Cooling System Failure, Hybrid Power Loss While Driving, Honda Sensing 360 - Lane Centering and Adaptive Cruise Control Issues. Of these, 2 are rated critical and should be addressed promptly.

Is the Honda Accord reliable?

The 2025 Honda Accord has 4 known issues documented across 1,603+ owner reports. 2 issues are rated critical: Hybrid Inverter/Power Control Unit (PCU) Cooling System Failure and Hybrid Power Loss While Driving. Prospective buyers should inspect for these issues and factor potential repair costs into their purchase decision. Regular maintenance following the manufacturer's schedule helps prevent many common problems.

How much does it cost to fix common Honda Accord problems?

Repair costs for known Honda Accord issues range from $0 to $6,000, depending on the specific problem and whether you choose DIY or professional repair. The most critical issue, Hybrid Inverter/Power Control Unit (PCU) Cooling System Failure, typically costs $100-$6,000 to repair. Au7o provides step-by-step DIY maintenance guides that can help reduce repair costs.

What is the 2018-2025 Honda Accord Hybrid Inverter/Power Control Unit (PCU) Cooling System Failure?

The 10th and 11th generation Accord Hybrid uses a dedicated liquid-cooled Power Control Unit (PCU/inverter) that manages power flow between the gas engine, electric motors, and high-voltage battery. The PCU cooling system uses a separate small coolant reservoir (distinct from eng… Repairs typically run $100-$6,000. Severity: high.

What is the 2023-2025 Honda Accord Hybrid Power Loss While Driving?

Due to a software error, the integrated control module (ICM) central processing unit (CPU) may reset while driving, causing a complete loss of drive power. The supplier did not fully understand component specifications when developing fault detection software, leading to false CP… Repairs typically run $0-$0. Severity: high.

Content on this page was compiled with AI assistance using NHTSA complaints, TSBs, owner reports, and public automotive data. While we strive for accuracy, this information may contain errors. Always verify repair procedures and specifications with your vehicle's service manual or a qualified mechanic.

Data sourced from 1,603+ owner reports, NHTSA recalls, TSBs, and automotive forums.

  • FAQ
    • Campaign #24V85900014/11/2024

    SERVICE BRAKES, HYDRAULIC:ANTILOCK/TRACTION CONTROL/ELECTRONIC LIMITED SLIP:CONTROL UNIT/MODULE

    Honda (America Honda Motor Co.) is recalling certain 2023 Civic, Acura RDX, Acura Integra, and 2022 Honda Accord vehicles. A ball valve in the vehicle stability assist (VSA) modulator may leak brake fluid, which can result in unintended vehicle movement when the brake hold feature is engaged or an unexpected increase in brake pedal travel.

    Campaign #23V43000015/06/2023

    AIR BAGS:SENSOR:OCCUPANT CLASSIFICATION:FRONT PASSENGER

    Honda (American Honda Motor Co.) is recalling certain 2020-2022 Pilot, Accord, Civic sedan, HR-V, Odyssey, 2020 Civic coupe, Fit, 2021-2022 Civic hatchback, 2021 Civic Type R, Insight, 2020-2021 CR-V, CR-V Hybrid, Passport, Ridgeline, Accord Hybrid, 2020 Acura MDX, 2022 Acura MDX, 2020-2022 Acura RDX, and 2020-2021 Acura TLX vehicles. The front passenger seat weight sensor may crack and short circuit, failing to suppress the air bag as intended.

    Campaign #24V06400001/02/2024

    + 4 more recalls. Check all on NHTSA.gov

    Enter your VIN at NHTSA.gov to check recalls specific to your vehicle.

    What is the 2023-2025 Honda Accord Honda Sensing 360 - Lane Centering and Adaptive Cruise Control Issues?

    The 11th generation Accord (2023+) introduced the updated Honda Sensing 360 system with front radar, front camera, and side cameras. Multiple software bugs affect the system: (1) Lane Centering Assist (LCA) makes abrupt steering corrections, especially near construction zones and… Repairs typically run $0-$400. Severity: medium.

    What is the 2023-2025 Honda Accord 11th Gen 2.0T Direct Injection Carbon Buildup and Idle Vibration?

    The 11th generation Accord 2.0T (K20C4 engine) inherited the direct-injection carbon buildup issue from the 10th gen. Without port injection to clean intake valves, carbon deposits accumulate on the intake valves and ports starting at 30,000-50,000 miles. The 2.0T engine is more… Repairs typically run $0-$500. Severity: medium.