Speed sensor

Tiny
FILTERPETER
  • 2003 FORD TAURUS

Six cylinder two wheel drive automatic 106,000 miles.

I just bought this car at an auction. The check engine light is on, code reads P0420-faulty speed sensor. The speedometer is not working and every once in a while it will not shift into second gear.
Do I replace the speed sensor and if so, where is it located? The transmiddion is an AX-49 per our local Ford dealer.

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Monday, February 1st, 2010 AT 5:40 PM

4 Replies

Tiny
MERLIN2021
  • EXPERT
  • 17,518 POSTS

You probably would, but the cluster could be NG too, you might want to re-scan the codes, P0420 is not a VSS code. Get and post the right code please.


http://www.2carpros.com/forum/automotive_pictures/62217_P0420_1.gif


The trannsmission is probably an AX4N?

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Monday, February 1st, 2010 AT 6:04 PM
Tiny
FILTERPETER
  • MEMBER

My mistook. It was P0720 not 0420.

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Monday, February 1st, 2010 AT 6:08 PM
Tiny
MERLIN2021
  • EXPERT
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Okay, thanks, let me have a look at it.

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Monday, February 1st, 2010 AT 6:27 PM
Tiny
MERLIN2021
  • EXPERT
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With this code, you can test the harness from the sensor to the PCM with a voltmeter, if OHM's are five ohms or lees the wire is okay check like this:


http://www.2carpros.com/forum/automotive_pictures/62217_oss_2.jpg


http://www.2carpros.com/forum/automotive_pictures/62217_Ford_PCM_104_Conn_1.jpg

This second one is PCM connector Is at the right rear of the engine compartment, mounted thru firewall. Heres the removal process. OUTPUT SHAFT SPEED (OSS) SENSOR Removal and Installation 1. Disconnect the battery ground cable. For additional information, refer to BATTERY, MOUNTING AND CABLES . 2. Disconnect the output shaft speed (OSS) sensor connector. Fig. 217: Disconnecting Output Shaft Speed Sensor Connector Courtesy of FORD MOTOR CO. 3. Remove the output shaft speed (OSS) sensor cover. 1. Remove the connector. 2. Remove the bolt. 3. Remove the cover. Fig. 218: Removing Output Shaft Speed Sensor Cover Courtesy of FORD MOTOR CO. 4. Remove the output shaft speed (OSS) sensor. Fig. 219: Removing Output Shaft Speed Sensor Courtesy of FORD MOTOR CO. NOTE: Lubricate the OSS O-ring before installing the sensor.


http://www.2carpros.com/forum/automotive_pictures/62217_ossa_1.jpg



http://www.2carpros.com/forum/automotive_pictures/62217_ossb_1.jpg



http://www.2carpros.com/forum/automotive_pictures/62217_ossc_1.jpg



http://www.2carpros.com/forum/automotive_pictures/62217_ossd_1.jpg

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Monday, February 1st, 2010 AT 6:46 PM

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