2018 Honda Pilot electrical problems

The auto engine stop-start feature engages when the vehicle comes to a stop (engine shuts off to save fuel), but then fails to restart when the driver releases the brake or accelerates. Owners report the engine remains off, electronics may flicker or cut out, and the dashboard displays error messages or tells them to put the vehicle in park. Restart requires multiple attempts and can take anywhere from several seconds to several minutes. This leaves the vehicle stranded at traffic lights and intersections, creating a safety hazard for the driver and other vehicles.

When: At stop lights, intersections, and during stop-and-go traffic; reports span from 7,000 miles to 94,000 miles

Symptoms owners cite: Engine fails to restart after auto idle-stop engages; Multiple restart attempts required; Restart delay of 30 seconds to several minutes; Dashboard error messages or 'put in park' warnings; Radio and AC cut out briefly or completely; Collision mitigation system warning lights illuminate; Unable to shift into neutral or engage drive while stalled; Vehicle stranded in active traffic

Codes mentioned: Stop/Start warning light, Collision mitigation system error, Keyless start system error

Repairs/costs cited: Dealerships reset the system via software update or computer upgrade; some owners report Honda issued a recall/fix, but the problem persists in some cases. Disabling the auto idle-stop feature manually before each drive eliminates the issue. Honda dealerships have disabled the feature on some vehicles without notifying owners in writing.

Recalls/TSBs owners mention: Honda issued a recall or fix for the auto idle-stop feature, but owners report the problem continues. Honda has directed dealerships to disable the feature on vehicles where owners complain. Some owners report Honda refused to make the feature fully disableable as a permanent solution.

Vehicle loses all or nearly all electrical power while being driven or idling in traffic. Lights, radio, instrument panel, power steering, brakes, and ability to shift gears all go out momentarily or completely. Airbags may deploy if a collision occurs during the failure. In one case, the vehicle could not be turned off and kept restarting on its own.

When: During merging (7,000 miles), at 40 mph while braking (50,000 miles), during stop-and-go traffic, at stop lights

Symptoms owners cite: Complete loss of electrical power (lights, radio, instruments); Loss of power steering; Transmission disengages; Vehicle unable to slow down or respond to brake input; Accelerator becomes unresponsive or appears to stick; Vehicle continues accelerating despite brake input; Vehicle cannot be turned off or turns itself back on; Airbags deploy if collision occurs

Codes mentioned: Bad camshaft sensor code (later replaced camshaft and other components)

Repairs/costs cited: One owner was charged $2,500 for camshaft and other parts replacement. Another vehicle was deemed a total loss after collision. Dealerships have attributed failures to dead or bad batteries despite the vehicle restarting without jump starts.

Recalls/TSBs owners mention: No manufacturer acknowledgment in narratives. One owner notes a rod bearing recall was issued after their failure, which causes the same immobilization symptoms.

Factory-installed windshield adhesive is improperly applied or degrades, allowing water to leak into the A-pillar and lower dash area. Water intrusion causes moisture, mold, loose windshield, and electrical faults that can disable the vehicle. Dealerships acknowledge this is a common issue but may blame windshield cracks instead of adhesive failure.

When: Manifests during prolonged rain; reported on vehicle with unknown mileage

Symptoms owners cite: Water leaking from upper driver's-side corner of windshield; Moisture and degradation in A-pillar and lower dash; Mold growth; Loose or shifting windshield; Electrical faults (nature unspecified in narrative); Potential vehicle disablement

Repairs/costs cited: Dealership can diagnose adhesive degradation but repair not detailed in narrative.

The backup camera and navigation/infotainment touchscreen display goes off intermittently, making it impossible to see the camera view while backing up or parking. The screen can flicker on and off without the driver's input. As of November 2023, the issue was 50% intermittent and had persisted since mid-2023. Replacement is expensive and complex.

When: Intermittent starting mid-2023; vehicle had approximately 60,000 miles at time of complaint

Symptoms owners cite: Backup camera screen blacks out intermittently; Navigation and infotainment screen goes off without warning; Screen flickering on and off; Unable to view camera while backing up or parking

Repairs/costs cited: Dealer estimate for replacement: $2,000–$3,000. Replacement requires disassembly of two full dashboard panels and disconnection of five separate cable connections plus air vent removal. Vehicle is out of warranty.

Battery cracks and leaks, with one reported explosion powerful enough to crack both the battery and its holder while the owner was starting the vehicle in the garage.

When: At 57,100 miles; one report at startup in garage

Symptoms owners cite: Battery cracks; Battery leaks fluid; Loud explosion from under hood; Smoke spewing from under hood; Battery holder also cracked

Repairs/costs cited: Battery was replaced in at least one case.

The keyless control module unit fails, causing the vehicle to shut off unexpectedly or preventing the engine from starting. The vehicle loses power or cannot be restarted without replacement of the keyless control module unit.

When: At 60,372 miles; one case from November 2021 with extended delay for parts

Symptoms owners cite: Vehicle shuts off unexpectedly while driving; Engine will not start; No warning light illuminated (in one case); Vehicle becomes inoperable

Repairs/costs cited: Requires keyless control module unit replacement. One owner reported their vehicle was in the dealership since November 15, 2021 waiting for Honda to provide the part.

The push start button does not function properly. Engine fails to crank, vehicle gets stuck in ignition-on mode without running, and the button may not respond to input. One TSB exists for 2016–2017 models with extended warranty coverage, but 2018 owners are excluded.

When: At unknown mileage; one report at 4,500 miles

Symptoms owners cite: Push start button does not start the engine; Engine does not crank; Vehicle stuck in ignition-on mode (running but not starting); Button requires multiple pushes; Dashboard displays 'keyless start system error'

Codes mentioned: Keyless start system error

Repairs/costs cited: TSB exists for 2016–2017 models providing extended warranty and free start/stop switch replacement, but 2018 models denied coverage despite the same fault.

Recalls/TSBs owners mention: Honda provided a TSB for 2016–2017 models with extended warranty and free replacement, but has not extended the same coverage to 2018 model year owners.

Transmission fails to engage or disengages unexpectedly, lurches between gears, or does not respond to shift commands. Vehicle may shift into park unintentionally when doors open (a safety feature that fails), or transmission behaves erratically during acceleration.

When: Various; one report at 75,000 miles; one report at highway speeds with cruise control

Symptoms owners cite: Transmission disengages while driving; Transmission fails to engage after auto idle-stop; Lurching when shifting from 1st to 2nd gear; Transmission goes into neutral at 70+ mph when cruise control is activated; Vehicle automatically shifts into park when doors open (designed safety feature), but then rolls backward; Delayed transmission response

Codes mentioned: Bad camshaft sensor code (in one case)

Repairs/costs cited: One owner was quoted $2,500 for camshaft and transmission-related parts. Another owner notes the 9-speed transmission is 'very badly designed.' One case involved transmission replacement per dealership recommendation, though it did not resolve the original issue.

Recalls/TSBs owners mention: One owner notes Honda issued a recall for rod bearings in March 2024 that causes the same immobilization symptoms they experienced, but their vehicle was not included in the recall.

The collision mitigation radar system overworks and fails, requiring expensive parts replacement. The system warning light illuminates, creating uncertainty about whether the collision-avoidance feature will function in a real emergency.

When: At unknown mileage; one report involved highway travel in construction zone

Symptoms owners cite: Collision mitigation system warning light illuminates; Collision mitigation system shows 'failed' status; Adaptive radar error message

Repairs/costs cited: One owner was charged $1,268.70 for radar part replacement. The part had not been involved in any collision but reportedly 'overworked' from normal use.

Instrument panel, dashboard warning lights, radio, and navigation screen flicker on and off without user input. Relays click audibly. Headlights turn on by themselves. Car alarm triggers randomly multiple times per day.

When: Reports span from 17,000 miles onward; one case notes part on backorder as of report date

Symptoms owners cite: Dashboard lights flicker when vehicle is turned off; Audible relay clicking; Headlights turn on without command; Radio station presets fail or reset and must be manually reloaded; Radio and AC cut out briefly at stop lights or during acceleration; Car alarm triggers randomly (7–10 times per day in one case); Navigation screen blacks out intermittently; Multiple warning lights illuminate

Repairs/costs cited: One owner reported a part was on backorder for an unspecified repair. Another dealership has parts on backorder for electrical issues.

All windows roll down unexpectedly when the unlock button on the key fob is pressed, even when the fob is in the owner's pocket. The failure recurs multiple times.

When: At approximately 4,500 miles

Symptoms owners cite: All windows roll down when unlock button is pressed; Failure occurs even when fob is in pocket; Unintended window descent

Repairs/costs cited: No repair attempted.

Recalls/TSBs owners mention: AutoNation Honda informed the owner that the failure was due to a design flaw with no remedy. Honda was made aware and stated nothing could be done.

Engine shuts off suddenly while the vehicle is being driven at highway speed, not as part of the auto idle-stop feature. The vehicle can lose power mid-highway or during acceleration after partial braking.

When: At 60 mph on highway; during active braking that does not result in complete stop

Symptoms owners cite: Engine shuts off while driving at highway speed; Loss of motive power mid-acceleration; Engine stalls during partial braking; Vehicle continues rolling or becomes uncontrollable

Repairs/costs cited: Owner reports concern that the engine could stop at any time. One case involved emissions failure system warning and connector rod issue diagnosis by a mechanic.

Recalls/TSBs owners mention: One owner notes Honda issued a recall for engine rod bearing defect in March 2024, but their vehicle does not show up in the recall database despite experiencing symptoms consistent with the defect.