Ford focus 02 tdi speed sensor

What sensor do you think this code pertains too. ?
P0720 OSS Insufficient Input From OSS Sensor PCM detected a loss of OSS signal during operation. Harsh shift, possible abnormal shift schedule. Go To Pinpoint Test E . What makes you think it's the sensor ? Could be a wiring issue , PCM - engine computer .
Test Step Result / Action to Take E1 ELECTRONIC DIAGNOSTICS SET UP

• Check to make sure the transaxle harness connectors are fully seated, terminals are fully engaged in the connector and in good condition before proceeding.
• Connect the diagnostic tool.
• Key in ON position.
• Enter the following diagnostic mode on the diagnostic tool: Diagnostic Data Link.
• Enter the following diagnostic mode on the diagnostic tool: PCM.
• Select Trans Priority.
• Select PID/Data Monitor and Record.
• Select the following PIDs: TSS or OSS.
• Does vehicle enter PID/Data Monitor and Record?

Yes
REMAIN in PID/Data. GO to E2 .

No
REPEAT procedure to ENTER PID. If vehicle did not enter PID, REFER to the Powertrain Control/Emissions Diagnosis (PC/ED) manual for diagnosis of PCM. E2 DRIVE CYCLE TEST

• While monitoring the appropriate sensor PID, drive the vehicle so that the transaxle upshifts and downshifts through all gears.
• Does the TSS or OSS Speed PID increase and decrease with engine and vehicle speed?

Yes
GO to E3 .

No
If the TSS or OSS Speed PID does not increase and decrease with engine and vehicle speed, INSPECT for open or short in vehicle harness STGT, sensor, a PCM concern or internal hardware concern. GO to E4 . E3 DRIVE CYCLE TEST ERRATIC

• While monitoring the appropriate sensor PID, drive the vehicle so that the transaxle upshifts and downshifts through all gears.
• Is the TSS or OSS Speed PID signal erratic (drop to zero or near zero and return to normal operation)?

Yes
If the sensor signal is erratic, INSPECT for intermittent concern in the harness, sensor or connector. GO to E4 .

No
CLEAR all DTCs. Rerun OBD. E4 CHECK POWERTRAIN CONTROL MODULE AND HARNESS FOR POWER

• Key in OFF position.
• Disconnect: TSS Sensor Connector.
• Disconnect: OSS Sensor Connector.
• Key in ON position.
• For TSS, measure the voltage between TSS sensor connector pin 1, harness side and ground; and between TSS sensor connector pin 2, harness side and ground.
• For OSS, measure the voltage between OSS connector pin 1, harness side and ground; and between OSS connector pin 2, harness side and ground.
  
• Is there any voltage?

Yes
GO to E5 .

No
GO to E6 . E5 CHECK HARNESS FOR SHORT TO POWER

• Key in OFF position.
• Disconnect: PCM Connector.
• Key in ON position.
• For TSS, measure the voltage between TSS sensor connector pin 1, harness side and ground; and between TSS sensor connector pin 2, harness side and ground.
• For OSS, measure the voltage between OSS connector pin 1, harness side and ground; and between OSS connector pin 2, harness side and ground.
  
• Is there any voltage?

Yes
REPAIR the circuit in question. TEST the system for normal operation.

No
INSTALL a new PCM. TEST the system for normal operation. E6 CHECK POWERTRAIN CONTROL MODULE AND HARNESS FOR GROUND

• Key in OFF position.
• Connect: PCM C415.
• For TSS, measure the resistance between TSS sensor connector pin 1, harness side and ground; and between TSS sensor connector pin 2, harness side and ground.
• For OSS, measure the resistance between OSS connector pin 1, harness side and ground; and between OSS connector pin 2, harness side and ground.
  
• Is the resistance greater than 10,000 ohms?

Yes
GO to E8 .

No
GO to E7 . E7 CHECK HARNESS FOR SHORT TO GROUND

• Key in OFF position.
• Disconnect: PCM Connector.
• For TSS, measure the resistance between TSS sensor connector pin 1, harness side and ground; and between TSS sensor connector pin 2, harness side and ground.
• For OSS, measure the resistance between OSS connector pin 1, harness side and ground; and between OSS connector pin 2, harness side and ground.
  
• Is the resistance greater than 10,000 ohms?

Yes
INSTALL a new PCM. TEST the system for normal operation.

No
REPAIR the circuit in question. TEST the system for normal operation. E8 CHECK RESISTANCE OF TSS SENSOR OR OSS.

• For TSS sensor, measure the resistance between TSS sensor connector pin 1, component side and TSS sensor connector pin 2, component side.
• For OSS, measure the resistance between OSS connector pin 1, component side and OSS connector pin 2, component side.
• Record the resistance. Resistance should be as follows:
  • OSS 675-775 ohms at -20°C (-4°F).
  • OSS 800- 920 ohms at 21°C (70°F).
  • OSS 1210-1390 ohms at 160°C (302°F).
  • TSS 273-333 ohms at -20°C (-4°F).
  • TSS 330-390 ohms at 21°C (70°F).
  • TSS 487-601 ohms at 160°C (302°F).
  
  
• Is the resistance within specification for the appropriate sensor?

Yes
GO to E9 .

No
INSTALL a new sensor. TEST the system for normal operation. E9 CHECK SENSORS FOR SHORT TO GROUND

• For TSS sensor, measure the resistance between TSS sensor connector pin 1, component side and ground.
• For OSS, measure the resistance between OSS connector pin 1, component side and ground.
  
• Is the resistance greater than 10,000 ohms?

Yes
INSTALL a new TSS sensor or OSS. TEST the system for normal operation.

No
REFER to Diagnosis By Symptom , for diagnosis of shift or torque converter concerns.

I believe that's a Speed Sensor issue.

Diag:
1. Ensure mainshaft and countershaft speed sensors are installed properly. Disconnect mainshaft speed sensor harness connector. Using a DVOM, measure resistance between sensor terminals.

2. If resistance is not 400-600 ohms, replace mainshaft speed sensor. If resistance is 400-600 ohms, disconnect 25-pin PCM harness connector "B". Check for continuity between ground and 25-pin PCM harness connector "B", terminals No. 15 (Red wire) and No. 14 (White wire).

3. If continuity is present, repair short to ground in Red or White wire between PCM and mainshaft speed sensor. If continuity is not present, reconnect mainshaft speed sensor harness connector. Measure resistance between 25-pin PCM harness connector "B", terminals No. 15 (Red wire) and No. 14 (White wire).

4. If resistance is not 400-600 ohms, go to next step. If resistance is 400-600 ohms, go to DTC
P0720 (FLASH CODE 9) . Check for loose PCM harness connectors. Replace PCM with a
known-good unit if necessary.

5. Disconnect mainshaft speed sensor harness connector. Check Red wire for continuity between 25-pin PCM harness connector "B", terminal No. 15 and mainshaft speed sensor harness connector. If continuity is present, go to next step. If continuity is not present, repair open in Red wire between 25-pin PCM harness connector and mainshaft speed sensor
harness connector.

6. Check White wire for continuity between 25-pin PCM harness connector "B", terminal No. 14 and mainshaft speed sensor harness connector. If continuity is present, check for loose PCM harness connectors. Replace PCM with a known-good unit if necessary. If continuity is not present, repair open in White wire between 25-pin PCM harness connector and mainshaft speed sensor harness connector.

Speed Sensor probably. Try:
1. Ensure mainshaft and countershaft speed sensors are installed properly. Disconnect mainshaft speed sensor harness connector. Using a DVOM, measure resistance between sensor terminals.

2. If resistance is not 400-600 ohms, replace mainshaft speed sensor. If resistance is 400-600 ohms, disconnect 25-pin PCM harness connector "B". Check for continuity between ground and 25-pin PCM harness connector "B", terminals No. 15 (Red wire) and No. 14 (White wire).

3. If continuity is present, repair short to ground in Red or White wire between PCM and mainshaft speed sensor. If continuity is not present, reconnect mainshaft speed sensor harness connector. Measure resistance between 25-pin PCM harness connector "B", terminals No. 15 (Red wire) and No. 14 (White wire).

4. If resistance is not 400-600 ohms, go to next step. If resistance is 400-600 ohms, go to DTC
P0720 (FLASH CODE 9) . Check for loose PCM harness connectors. Replace PCM with a
known-good unit if necessary.

5. Disconnect mainshaft speed sensor harness connector. Check Red wire for continuity between 25-pin PCM harness connector "B", terminal No. 15 and mainshaft speed sensor harness connector. If continuity is present, go to next step. If continuity is not present, repair open in Red wire between 25-pin PCM harness connector and mainshaft speed sensor
harness connector.

6. Check White wire for continuity between 25-pin PCM harness connector "B", terminal No. 14 and mainshaft speed sensor harness connector. If continuity is present, check for loose PCM harness connectors. Replace PCM with a known-good unit if necessary. If continuity is not present, repair open in White wire between 25-pin PCM harness connector and mainshaft speed sensor harness connector.

Please follow the Instruction below.

1.Disconnect the ground battery cable using a wrench to hold the terminal bolt in place as you loosen the retaining nut with another wrench.

2. Locate the accelerator cable next to the throttle assembly towards the back and top of the engine and remove the shield. Pull the retaining pins using a pair of slip joint pliers if necessary

3. Remove any other accessories that might interfere with the removal of the camshaft sensor like wiring harness, spark plug retainers or engine cover, depending on your particular model.

4. Move the fuel-injectors wiring harness off the valve cover studs as well to gain access to the camshaft sensor if necessary.

5. Locate the camshaft sensor around the top of the engine. For more information please click the link below.

Ford Taurus Campshaft Position Sensor

6. Unplug the camshaft-sensor electrical connector by pressing on the lock tab and pulling the plastic connector off the sensor.

7. Unfasten the two sensor mounting screws using a Phillips screwdriver and remove the sensor from the engine compartment.

Hope this help

Speed Sensors REMOVAL & INSTALLATION Front Fig. 1: The speed sensor sits directly over the exciter ring in the front knuckle
Fig. 2: Detach the speed sensor connector in the engine compartment
Fig. 3: Remove the speed sensor harness from the routing clips
Fig. 4: A special E6 Torx® socket is required to remove the speed sensor retaining bolt

1. Disconnect the negative battery cable.
2. From inside engine compartment, detach sensor assembly 2-pin connector from the wiring harness.
3. Remove the steel routing clip attaching the sensor wire to the tube bundle on the left sensor or remove the plastic routing clip attaching the sensor wire to the frame on the right sensor.
4. Remove the rubber coated spring steel clip holding the sensor wire to the frame.
5. Remove the sensor wire from the steel routing clip on the frame and from the dust shield.
6. Remove the sensor attaching bolt from the front spindle and slide the sensor out of the mounting hole. To install:
   
7. Install the sensor into the mounting hole in the front spindle and attach with the mounting bolt. Tighten to 40–60 inch lbs. (4.5–6.8 Nm).
8. Insert the sensor routing grommets into the dust shield and steel bracket on the frame. Route the wire into the engine compartment.
9. Install the rubber coated steel clip that holds the sensor wire to the frame into the hole in the frame.
10. Install the steel clip that holds sensor wire to tube bundle on left side or plastic clip that holds sensor to frame on right side.
11. Reconnect the 2-pin connector to wire harness. Connect the negative battery cable.

Rear Fig. 5: Detach the speed sensor connector in the luggage compartment
Fig. 6: Grasp the harness and . . .
Fig. 7: . . . remove it from the routing brackets
Fig. 8: The rear speed sensor is mounted on the back of the hub assembly
Fig. 9: Remove the sensor retaining bolt and remove the sensor from the hub

1. Disconnect the negative battery cable.
2. From inside luggage compartment, detach 2-pin sensor connector from wiring harness and push sensor wire through hole in floor.
3. From below vehicle, remove sensor wire from routing bracket located on top of rear axle carrier housing and remove steel clip holding sensor wire and brake tube against axle housing.
4. Remove screw from clip holding sensor wire and brake tube to bracket on axle.
5. Remove sensor to rear adapter retaining bolt and remove sensor. To install:
   
6. Insert sensor adapter and install retaining bolt. Tighten to 40–60 inch lbs. (4.5–6.8 Nm).
7. Attach the clip holding the sensor and brake tube to the bracket on the axle housing and secure with the retaining screw. Tighten the screw to 40–60 inch lbs. (4.5–6.8 Nm).
8. Install steel clip around axle tube that holds sensor wire and brake tube against axle tube and push spool-shaped grommet into clip located on top of axle carrier housing.
9. Push sensor wire connector up through hole in floor and seat large round grommet into hole.
10. Reconnect sensor 2-pin connector to wiring harness inside luggage compartment.

Loosen and pull back the carpeting in the back of the trunk behind the taillights.

Step 2 Remove the plastic wingnuts that secure the taillight to the vehicle's body.

Step 3 Separate the taillights from the vehicle's body, but do not disconnect the wiring.
Installing the Connector

Step 1 Examine the wiring harness on each taillight. There will be a plastic connector on each side that must be separated to insert the wiring harness connector.

Step 2 Thread the trailer wiring connectors through holes in the body behind each taillight. Follow the instructions provided with the connector to determine which connector belongs in which side of the vehicle.

Step 3 Insert the wiring connectors into the vehicle's wiring harness.
Reinstalling the Taillights

Step 1 Push the taillights into position against the body and reinstall the plastic wingnuts that secure them. Be careful not to crush the wiring.

Step 2 Route the trailer wiring underneath the carpeting in the trunk, so that the trailer connector can extend out between the trunk lid and bumper when in use, and be tucked into the trunk when not in use.

Step 3 Reposition the trunk carpet over the taillight housing.

this is a common problem for these cars glow plugs go bad like spark plugs however the smoke would lead to bad mass airflow meter. it is not telling ecu corrcet miss. disconnect mass airflow meter. when cold see if this makes it start better. it should would means you need new m.a.f. glow plug issue take a test light place clamp on positive of battery then pull off glow plug connectors place tip of test light on glow plug the bad one will have a dull light unlike the good one which will be brighter. will need new plugs and wire harness four **** connectors and wire striper and crimper will fix concern good luck

I had a 2001 and the transmission was not shifting correctly that was diagnosed as a speed sensor issue.

There is a speed sensor on the transmission, near the rear.

And there is a speed sensor on one of the front wheel hubs...

Tell me what the problem is?

Pin --- Color --- Stripe --- Function

Harness 1

1 --- White --- Black --- Left front +
2 --- Gray --- Black --- Left front -
3 --- White --- Purple --- Left rear +
4 --- Gray --- White --- Left rear -
5 --- White --- Red --- Right front +
6 --- Gray --- Red --- Right front -
7 --- White --- (none) --- Right rear +
8 --- Gray --- (none) --- Right rear -

Harness 2

1 --- (not used)
2 --- Black --- Green --- Radio Ground
3 --- (not used)
4 --- Orange (thin) --- Black --- Radio Illumination
5 --- Green --- Yellow --- Radio switch
6 --- Black --- Yellow --- Radio Ground
7 --- Orange (thick) --- Black --- Radio 12V

Harness 3

1 --- White --- Green --- Speed sensor
2 --- (not used)
3 --- (not used)
4 --- (not used)
5 --- (not used)
6 --- (not used)

Its a straight swap, just pop off the top half of the steering column and unclip the old stalk from its housing and remove the wiring harness