Q: Reduced engine check engine

asked by on July 28, 2016

I own a Honda Passport. The “Reduced Power” light and the “Check Engine” light came on. The car won’t go over 30 mph. It gave me 2 codes for the Throttle Position Sensor and Accelerator Sensor, and I have changed both of those parts. It worked fine for about 40 miles, and then the lights came back on. The car lost power again. Does anyone have any ideas about what the problem could be?

Mass Airflow Sensor Replacement $188.36 - $786.53 Get a Quote
Loss of power Inspection $94.99 - $114.99 Get a Quote

It is possible that this could be related to your mass air flow sensor on your 2001 Honda Passport. The mass air flow sensor and the throttle position sensor work in conjunction with each other to send signals to the powertrain control module.

From there, the powertrain control module will decide how much or how little fuel to add to each cylinder depending on the amount of air coming through the intake. If the throttle position sensor is known to be a good part, I would recommend having a certified mechanic run a test on the mass air flow sensor to determine if it is working properly. If the sensor is not working properly, I would recommend having it replaced as this will likely resolve the issues you are having with your vehicle. If you would like to have this checked first, a certified technician from YourMechanic can diagnose your vehicle’s loss of power and let you know what needs to be done.

The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing


Experienced Mechanic?

Earn up to $70/hr

What others are asking

Sloshing noise when pressing the accelerator
Hi there. That noise you are hearing is the engine coolant (anti-freeze) traveling through the heater core. The reason you can hear it is due to air being trapped in your engines cooling system. You may not have any drivability...
Had to jumpstart car but battery new
Normally, the car's battery is the most common cause of no starts. With the battery being a year old, it will still need to be tested to rule it out. If the battery is found to be okay, the alternator...
Loud jet engine noise when accelerating and when turning on AC
A few different things can cause this fault. Though 50,000 miles seems a bit early for most of them, the usual causes for the loud noise include: a failed idler, a faulty belt tensioner, an air leak, an exhaust leak,...
Rattling and bumping noises underneath car & getting worse
Hello. Unfortunately, if this is not a mechanical repair to the powertrain it would not be considered under the Lemon Law. Most of the time this noise comes from the exhaust. In a lot of cases, unbolting the exhaust and...
Antifreeze mixing in with oil and leaking.
If oil and coolant is mixing, then the engine oil level may have overfilled the engine oil and coolant mixed and oil got on the ground. Pull out your dipstick to check oil level to see if it is overfilled....
I think my cars transmission is going out
Hello. Grinding noises at high speeds could be related to wheel bearing or transmission issues. This type of problem may be difficult to diagnose without test driving the vehicle to determine whether or not it is worth fixing. A certified...
Making a ticking noise when ideling
This may very well be a slight bit of excess valve train noise. Your car should have the timing belt replaced around every 60,000-70,000 miles. If it is possible that you may have put that many miles on the car...
When running the radio and/or HVAC, the car (while creeping to a stop) will almost stall and all lights will dim and the radio cuts off.
Hi and thanks for contacting YourMechanic. Look under the vehicle to see if the motor mounts (https://www.yourmechanic.com/services/engine-mount-replacement) are broken or missing. This can cause the engine to tilt too much causing a short in one of the high voltage wires....
Does the whole steering column need to be replaced in order to replace a fried steering column module?
I would ask the mechanic for the exact part number of the electronic component that he believes has failed. Or, at least have him "name" the part and indicate where in the column assembly the part resides. The steering column...

Related articles

Symptoms of a Bad or Failing Oxygen Sensor
Common signs of a faulty car oxygen sensor include the Check Engine Light coming on, bad gas mileage, and a rough idle.
What Does the Adaptive Lighting Indicator Warning Light Mean?
The adaptive lighting warning light means there is an issue with the automatic function for the front car headlights, which could be caused by dirt.
What Does the Trailer Tow Hitch Warning Light Mean?
The trailer tow hitch light is designed to warn you when there is an issue with your car's tow hitch, possibly that it is unlocked.