Ford fiesta 54 model ghia. When car is put in reverse the parking sensors no longer beep but deliver a constant low consistent tone. Nothing is blocking or obstructing the sensors.

First you can go around the car and check all the silly stuff. Check all the windows are wound fully up, open and close all the doors and the tailgate then remove and refit your fuel filler cap. These can trigger warning tones. Check there isn't anything heavy on one of the seats as this can trigger the seat belt warning tone. Yes, I did it with a bag of potatoes and it drove me mad trying to figure it out. Check you haven't turned a car feature on by accident like the Parking sensors or the 'Passing to Close' alarm. Some reverse sensors 'Beep' when you put it in gear so have you left it in gear when you parked the car?

Parking Aid Navigator The parking aid system consists of the following:

• one radar sensor (located in the center of the rear bumper)
• two ultrasonic parking aid sensors (located on the left and right side of the rear bumper)
• parking aid module (located behind the LH C-pillar trim panel)
• parking aid speaker-audible warning tone (located in the parking aid module)

Expedition The parking aid system consists of the following:

• four ultrasonic parking aid sensors (located in the rear bumper)
• parking aid module (located behind the LH C-pillar trim panel)
• parking aid speaker-audible warning tone (located on the parking aid module)
• reverse gear select input (to the parking aid module from the reverse lamp circuit)
• The parking aid system is enabled when the ignition switch is in the RUN position and REVERSE is selected. The system can be disabled through the message center RESET switch located in the instrument cluster. The parking aid menu is displayed until the transmission is taken out of REVERSE. While the menu is displayed, pressing the message center RESET switch changes the parking aid system status to OFF.

Could be a faulty sensor or a problem with the fuses or wiring related to that system

A simpler solution: Turn off your AC. It has a sensor that beeps when it's over-heated. If you have a trip that will take a couple of hours or more, top off your coolant and turn your AC down to its lowest fan and temp level. You're welcome.

Sensor has failed/Malfunctioned or needs to be reset take to auto electrician for further diagnosis. I hope this helps.

spark plug gap .041 in or 1.1 mm

The pump seals in the transmission are worn and need to be replaced(rebuild or replace transmission)

Generally, reverse light could be a wire puged in on the gear box.

Keep us updated.

Try to clean rear parking sensors. Check also electric cables and connections, clean if necessary. Commons faults are sensors out of order. If one or more sensors faults you hear only a continous constant noise when you put in "R" gear. You need a VAS, VAG-COM, Bosch KTS, ... diagnosis scantool. The factory parking system will be scaned from errors with this instrument, and you will find exactly which sensors are out of order (for example: rear left center sensor, rear right side sensor break off, short to ground or short to plus).

have exact same problem myself checked all fuses they are fine & my car is a ford fiesta yr 2000 model Ghia gonna have a look at the 50amp fuses

Any1 else out there have a possible solution. If this 1 dont work