Honda Accord Hybrid won't shift problems

Filed Aug 31, 2026 · Electrical, Engine · FL

While driving on a bridge at under 20 mph, the vehicle's head gasket failed, causing the engine to overheat and coolant to leak from within the engine. The vehicle threw diagnostic trouble code P2601 and immediately entered "limp mode," severely cutting engine power and vehicle speed. Because this happened on a bridge with no shoulder to safely pull over, the sudden loss of power created a serious safety hazard — the vehicle could not maintain a safe speed or keep pace with surrounding traffic, increasing the risk of being struck by other vehicles. The vehicle was taken to a Tampa Honda (11000 N Florida Ave), where the failure was confirmed to be a blown head gasket that allowed coolant to leak into the engine cylinders. The head gasket and related components were replaced at a cost of approximately $5,000 to restore the vehicle to safe operating condition. The failed component is no longer available for inspection in its failed state, as replacement was required to make the vehicle drivable. No dealer, manufacturer representative, police officer, or insurance adjuster has inspected the vehicle; only at Tampa Honda facility that performed the repair diagnosed and confirmed the head gasket failure. Prior to this incident, no warning lamps or symptoms were noted — the P2601 code and limp mode activation occurred simultaneously with the sudden overheating and coolant loss, with no advance warning. This failure is consistent with a widely reported defect pattern among Honda vehicles with similar engines, where the head gasket fails prematurely and allows coolant to enter the cylinders. Honda has not issued a recall or acknowledged a manufacturing defect despite numerous consumer reports describing the same failure mode.

Filed Mar 9, 2026 · Acceleration, Electrical · CA

1. Component: The engine head gasket and the combustion system (specifically Cylinder 2). Specifics: A leak-down test confirmed a failure in Cylinder 2, leading to coolant intrusion. This was initially masked by a water pump code, but after the water pump was replaced and the code returned, a borescope confirmed "clean" pistons (steam-cleaned by coolant) and tap scarring. Availability: Yes, the vehicle and all diagnostic records are available for inspection. 2. Emergency Maneuvers: On multiple occasions, the car entered "Limp Mode" while driving 70–75 mph on the freeway. This caused a sudden, dangerous drop in speed, forcing me to maneuver through high-speed traffic to reach the median/suicide lane. Stranded: The vehicle overheated 5 times in one trip, leaving me vulnerable on the side of a busy freeway. 3. Yes. An independent shop confirmed the failure via a leak-down test, a borescope inspection, and physical analysis of the spark plugs. They confirmed that despite the computer throwing a water pump code, the mechanical failure is the head gasket. 4.Status: It has been inspected by an independent service center. I am now using their findings to pursue a lawsuit/claim against Honda for selling a vehicle with a pre-existing internal engine defect. 5. Timeline: Symptoms began in April 2024 (two months after purchase). Initial Signs: An "Emission System" warning light appeared. The diagnostic code indicated a water pump failure, which was replaced in April. Recurring Symptoms: In November, the car suffered multiple misfires and "Limp Mode." In March, the "Emission System" light and the same water pump code returned, but the shop confirmed the pump was functional and the true cause was the head gasket leak into the cylinders.

Filed Sep 12, 2025 · Engine · CA

It appears the head gasket failed due to an anomaly on the engine block between cylinders. We were driving down the road when the engine lost power and went into limp mode ( dealer term). The problem of the head gasket was confirmed by the dealer, but the anomaly on the short block has not been explained. The engine block was inspected by the service tech, service manager and a rep from Honda. No explanation given. No warning lights came on until immediately after the engine lost power. The engine block is available for inspection at the dealership.

Filed Apr 30, 2025 · Brakes · MD

Driving routine commute of 20 miles at Highway speeds on a clear weekday. The vehicle experienced ALL warning lights on dash and immediately went into limp mode. No power applied to the wheels when pressing the power pedal. Brought vehicle to the side of the road and powered off. Waited 30 secs to a minute and pressed Power and the only remaining error of "Brake System Problem" stayed up on the Driver display. Dropped vehicle off at the dealer, 3 miles from my job, to have them evaluate. After half a day the dealer stated "no problem found", "intermittent error". Now there is a known problem with late Honda vehicles with water intrusion into the tail lights and that in turn causes a short in the Braking system. I have noticed condensation in the tail light (Drivers side) but only a very small amount. Dealer stated they checked both tail lights and found no cracks or condensation. In my opinion my car falls into this category but dealer would not agree to a replacement assembly UNLESS they saw condensation in the tail lamp unit.

Filed Mar 29, 2025 · Engine · NC

On 3 occasions, was accelerating on interstate (after entering from ramp), check engine light began blinking, car shook terribly & went into limp mode - gas pedal was to the floor but car continued to lose power. Had to pull off road - turned car off, waited 20 minutes, turned car back on - check engine light went off & car was drivable. Another time, while accelerating on interstate, check engine light started blinking & all warning lights came on flashing. Car began losing power - had to pull off on side of the interstate - car was towed to the dealership. Another time, was pulling off from a light on highway - I accelerated, check engine light began blinking, car shook terribly & went into limp mode, requiring me to pull off on side of the highway - turned the car off for 15 minutes - turned it back on, light was off & was able to drive car. Most recent incident - was accelerating on small, 2 lane highway - check engine light began flashing & car shook terribly but didn't go into limp mode - otherwise behaved as before. Each time, took the car to the dealer ASAP to report problem. First time, was told they had to fix broken tail light b/c it was throwing off system & they couldn't get a computer reading. Once done, was told that they got a "CYL2 Miss Fire Code. Performed diagnosis on code. Diagnosis led to improperly adjusted valves. Performed valve adjustment. Found half of valves loose and half tight." Was road tested - no further concerns noted by dealer. Other times, was told that computer wasn't showing any codes. Last event literally happened in front of Advance Auto - pulled in/hooked up to check code - indicated a Cyl 2 misfire. Took to dealer - said no code showing - berated me for having checked @ Advance - said it erased any codes, even though I told them the code that was noted. This is a serious safety issue due to car going limp when accelerating on interstate where others are going 70-90 mph. Dealer says nothing they can do d/t no code showing.

Filed Mar 1, 2025 · Electrical, Engine · KS

While driving at speeds between 3-70 MPH, the vehicle will intermittently display multiple warning lamps along with having an immediate loss of motive power (go into LIMP mode). When this occurs, the car must be coasted over to the side of the road & restarted typically twice to clear all of the dash alerts. Having a car go into LIMP mode while driving on city streets, highways or interstates puts our family in danger as well as the safety of others on the road near us. This issue has reproduced itself over a dozen times for our family & the service department has not been able to reproduce/confirm when brought in for repair. The service team on the 1st service date found multiple codes for loss of communications. They cleared the codes, found no permanent codes, performed a hard reset on the system & sent the car home. The 2nd service call again showed multiple codes for loss of communications. They were not able to reproduce the issue & sent the car home. The 3rd service call displayed the same codes as before. They updated the ICM software & sent the car home. The 4th service call displayed the same codes. The service team attempted to reproduce the issue by driving the vehicle for ~250 miles unsuccessfully & wanted to send the car home. We disagreed & they mentioned we should open a case with Honda which we did. Several days later Honda & the service team replaced the integrated control unit. It will take much time & many miles before we can be certain the ICM replacement did or did not resolve the issue. The issue 1st occurred near 6,200 in mileage and roughly 4 months after purchase. The car now has over 27,000 miles. As far as warning lamps during an event, multiple pop up that are images/icons as well as text of issues you can scroll through. Battery lamp, vehicle stability assist reduced traction and handling, brake system problem brake performance may be reduced, electric power steering system problem steering assist reduced, etc.

Filed Jan 17, 2025 · Engine, Fuel system · 14,559 miles · CT

The contact owns a 2023 Honda Accord Hybrid. The contact stated while driving 30 MPH, the check engine warning light illuminated, and the message "Emission System Problem - Power May Be Reduced - See Your dealer" was displayed. The vehicle went into LIMP mode and lost motive power. The contact was able to pull to the side of the road. The vehicle was able to restart after several attempts. The check engine warning light remained illuminated, and the message was displayed. The contact stated that the failure recurred while driving on a second occasion. Additionally, the contact stated while driving 75 MPH on another occasion, the failure recurred, nearly causing the vehicle to be rear-ended. The contact was able to pull to the side of the road. The contact stated that upon turning off and restarting the vehicle, the contact was able to continue driving. The dealer was notified of the failure. The vehicle was not diagnosed or repaired. The manufacturer was notified of the failure and a case was opened. The failure mileage was 14,559.

Filed Sep 3, 2024 · Electrical · WA

I was stopped and car completely shut down felt a lurch like I was hit and all systems shut down. I was able to coast to the side and restart car after apx 30 sec. Continued to state take car to dealership braking malfunction. Per dealership car went into limp mode and needed a software update. Safety would be extremely at risk if I had been driving on the freeway

Filed Apr 27, 2024 · Fuel system · CA

Sudden Loss of power. All warnings on. Limp mode only. Brought to dealer with brake system problem message. Restarted hours later and okay with no codes. Now worry on freeway about being rear ended if it happens again. Went from 70 to 20 all at once.

Filed Dec 24, 2023 · Acceleration, Brakes · NY

On Tuesday evening, December 19, 2023, while driving at highway speeds, the following message appeared on my digital display: BRAKE SYSTEM Brake system problem. Brake performance may be reduced. See your dealer. Other system messages began to appear, including, I believe, concerning the steering. More important, the car immediately went into a “limp mode“ with the speed dropping to 20 miles an hour, and then further down to as slow as 2 mph. Fortunately, I was not far from an exit and at the exit I pulled off the exit ramp onto the grass. I then shut the engine off and restarted it immediately. I was able to get back onto the exit ramp, but the initial message quickly reappeared and I was able to make it home driving between 10 and 15 mph. The next day the car was towed to the dealer who advised me that the issue was resolved by updating the software. At no point, did I ever receive a message or other indication that a software update was needed. The car has fewer than 5000 miles on it. The safety issue results from my being forced to drive at a very low speed while still on the highway. I independently did some online research and discovered that this type of issue has happened before with both this model and other Honda hybrids.