On automatic transmissions the accumulator cover can leak due to failed o-rings. Replacing the o-rings and cover will address this issue.
Car problem reports
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Most reported Honda Passport problems
Varnish build up in the engine can cause one or more hydraulic lash adjusters to stick and cause a ticking noise in the engine. The noisy hydraulic lifter will need to be located and cleaned to stop the noise.
Certain models may have a vibration issue at highway speeds that could be due to uneven tire pressures, tire rim out of specs, wheels out of balance, AC compressor bracket bolts not torqued correctly, misalignment of the steering shaft coupler, improper ride height, or wheel alignment out of adjustment. A qualified technician is needed to sort out these problems and correct them.
A worn vehicle speed sensor driven gear can cause the speedometer not to work. Replacing the worn out speed sensor should correct this concern.
A broken hatch button can cause the rear hatch not to open when you push the release button. Replacing the button should repair this issue.
Dry suspension components can cause a spring-type pop when it moves. Lubricating the suspension will stop the noise.
Fuel injector "leakdown" can cause a long crank time after the engine is warmed up. The fuel injectors need to be replaced to address this problem.
On some models, the right motor mount cover can hit the chassis and cause a vibration at idle. Replacing the motor mount will repair this issue.
On some models the powertrain control module (PCM) software delays idle speed changes during cold starts causing stalling problems. A software update from Honda will repair this particular issue.
On certain models the door checkers can contact the door wiring harness and damage the wires causing blown fusees and no sound from the door speakers. Repairing the wires or replacing the harness and routing it away from the door checkers will repair this issue.
ON 4WD vehicles faulty vacuum solenoid valves can cause the four wheel drive light to stay on all the time. Replacing the valves and possibly the wire harness is needed for this repair.