I am looking for the location of my speed sensor so i can change it on my vehicle listed above Laredo.
May 22, 2019 at 6:13 PM
Location of speed sensor
JOHN ROBERT DICKHAUT
- MEMBER
- 6 POSTS
Good morning,
Which speed sensor are you replacing and why? There are several.
If it is code related, what is the code?
Roy
Which speed sensor are you replacing and why? There are several.
If it is code related, what is the code?
Roy
May 22, 2019 at 8:01 PM
P0501.
May 23, 2019 at 12:07 AM
Okay, this code indicates the speedometer is not working correctly.
Does the speedometer work?
Below is the description and possible failures for the issue.
Roy
P0501
Descriptor
Vehicle Speed Sensor 1 Performance
Probable Causes
Active Bus or Communication DTCs
Powertrain Control Module (PCM)
Tire Circumference
Description
Theory of Operation
The vehicle speed sensor rationality is a continuous test that monitors the vehicle speed sensor for lack of activity. The rationality will not run if a limp-in exists for MAP, Throttle Position, and Engine Coolant Temperature. If vehicle speed sensor is below a minimum threshold for a period of time after the vehicle is operated at a sufficient load, a failure will be indicated.
- When Monitored:
With the engine running, transmission not in park or neutral, brakes not applied, and engine rpm greater than 1500.
- Set Condition:
This code will set if no vehicle speed signal is received from the ABS Module up to 120 seconds for 2 consecutive trips. Two Trip Fault. Three good trips to turn off the MIL.
image
Always perform the Pre-Diagnostic Troubleshooting procedure before proceeding. See: Computers and Control Systems > Initial Inspection and Diagnostic Overview > Pre-Diagnostic Troubleshooting Procedure.
1. ACTIVE DTC
1. Ignition on, engine not running.
2. With a scan tool, select View DTCs.
NOTE: Check for any Bus Communication DTCs. If no Bus or Communication DTCs are set, check for active DTCs stored in the Anti-Lock Brake Module. Any bus or communication DTCs or VSS DTCs in the Anti-Lock Brake Module must be properly diagnosed before continuing.
3. Start the engine.
4. Allow the engine to reach normal operating temperature.
5. With a scan tool, select View DTCs.
NOTE: It may be necessary to drive the vehicle to meet the conditions to set this DTC, try to repeat the conditions in which the fault originally set by reviewing the Freeze Frame data.
Is the DTC Active or Pending at this time?
Yes
- Go To 2
No
- Refer to the INTERMITTENT CONDITION Diagnostic Procedure. See: Computers and Control Systems > Initial Inspection and Diagnostic Overview > Intermittent Condition Test.
2. VISUAL INSPECTION
NOTE: This code can set due to tire circumference differences and from the front or rear wheels being on a slippery surface while the opposite tires are not.
1. This code may also set on a hard acceleration on loose gravel or during other off road driving conditions.
2. Check tire pressure of all the tires.
3. Check tire wear on all the tires.
4. Ask the customer what the road and driving conditions were like when the fault set.
Were any problems found?
Yes
- Repair as necessary. If the code set during a front OR rear wheel spin condition, no repair is necessary.
- Perform the POWERTRAIN VERIFICATION TEST. See: A L L Diagnostic Trouble Codes ( DTC ) > Verification Tests > Powertrain Verification Test.
No
- Go To 3
3. POWERTRAIN CONTROL MODULE (PCM)
1. Using the wiring diagram/schematic as a guide, inspect the wiring and connectors between the Vehicle Speed Sensors, ABS Module, and the Powertrain Control Module (PCM).
2. Look for any chafed, pierced, pinched, or partially broken wires.
3. Look for broken, bent, pushed out or corroded terminals. Verify that there is good pin to terminal contact in the Vehicle Speed Sensors, ABS Module, and Powertrain Control Module connectors.
4. Search for any Technical Service Bulletins that may apply.
Were there any problems found?
Yes
- Repair as necessary.
- Perform the POWERTRAIN VERIFICATION TEST. See: A L L Diagnostic Trouble Codes ( DTC ) > Verification Tests > Powertrain Verification Test.
No
- Replace and program the Powertrain Control Module.
- Perform the POWERTRAIN VERIFICATION TEST. See: A L L Diagnostic Trouble Codes ( DTC ) > Verification Tests > Powertrain Verification Test.
Does the speedometer work?
Below is the description and possible failures for the issue.
Roy
P0501
Descriptor
Vehicle Speed Sensor 1 Performance
Probable Causes
Active Bus or Communication DTCs
Powertrain Control Module (PCM)
Tire Circumference
Description
Theory of Operation
The vehicle speed sensor rationality is a continuous test that monitors the vehicle speed sensor for lack of activity. The rationality will not run if a limp-in exists for MAP, Throttle Position, and Engine Coolant Temperature. If vehicle speed sensor is below a minimum threshold for a period of time after the vehicle is operated at a sufficient load, a failure will be indicated.
- When Monitored:
With the engine running, transmission not in park or neutral, brakes not applied, and engine rpm greater than 1500.
- Set Condition:
This code will set if no vehicle speed signal is received from the ABS Module up to 120 seconds for 2 consecutive trips. Two Trip Fault. Three good trips to turn off the MIL.
image
Always perform the Pre-Diagnostic Troubleshooting procedure before proceeding. See: Computers and Control Systems > Initial Inspection and Diagnostic Overview > Pre-Diagnostic Troubleshooting Procedure.
1. ACTIVE DTC
1. Ignition on, engine not running.
2. With a scan tool, select View DTCs.
NOTE: Check for any Bus Communication DTCs. If no Bus or Communication DTCs are set, check for active DTCs stored in the Anti-Lock Brake Module. Any bus or communication DTCs or VSS DTCs in the Anti-Lock Brake Module must be properly diagnosed before continuing.
3. Start the engine.
4. Allow the engine to reach normal operating temperature.
5. With a scan tool, select View DTCs.
NOTE: It may be necessary to drive the vehicle to meet the conditions to set this DTC, try to repeat the conditions in which the fault originally set by reviewing the Freeze Frame data.
Is the DTC Active or Pending at this time?
Yes
- Go To 2
No
- Refer to the INTERMITTENT CONDITION Diagnostic Procedure. See: Computers and Control Systems > Initial Inspection and Diagnostic Overview > Intermittent Condition Test.
2. VISUAL INSPECTION
NOTE: This code can set due to tire circumference differences and from the front or rear wheels being on a slippery surface while the opposite tires are not.
1. This code may also set on a hard acceleration on loose gravel or during other off road driving conditions.
2. Check tire pressure of all the tires.
3. Check tire wear on all the tires.
4. Ask the customer what the road and driving conditions were like when the fault set.
Were any problems found?
Yes
- Repair as necessary. If the code set during a front OR rear wheel spin condition, no repair is necessary.
- Perform the POWERTRAIN VERIFICATION TEST. See: A L L Diagnostic Trouble Codes ( DTC ) > Verification Tests > Powertrain Verification Test.
No
- Go To 3
3. POWERTRAIN CONTROL MODULE (PCM)
1. Using the wiring diagram/schematic as a guide, inspect the wiring and connectors between the Vehicle Speed Sensors, ABS Module, and the Powertrain Control Module (PCM).
2. Look for any chafed, pierced, pinched, or partially broken wires.
3. Look for broken, bent, pushed out or corroded terminals. Verify that there is good pin to terminal contact in the Vehicle Speed Sensors, ABS Module, and Powertrain Control Module connectors.
4. Search for any Technical Service Bulletins that may apply.
Were there any problems found?
Yes
- Repair as necessary.
- Perform the POWERTRAIN VERIFICATION TEST. See: A L L Diagnostic Trouble Codes ( DTC ) > Verification Tests > Powertrain Verification Test.
No
- Replace and program the Powertrain Control Module.
- Perform the POWERTRAIN VERIFICATION TEST. See: A L L Diagnostic Trouble Codes ( DTC ) > Verification Tests > Powertrain Verification Test.
May 23, 2019 at 1:10 AM
Still does not tell me were it is located.
May 23, 2019 at 4:58 AM
The rear ABS sensors send a signal to the PCM for vehicle speed.
It is not the sensor as indicated in the code description and possibilities. If it was a sensor, you would have an ABS light with a fault stored.
Both rear sensors send the signal.
Roy
It is not the sensor as indicated in the code description and possibilities. If it was a sensor, you would have an ABS light with a fault stored.
Both rear sensors send the signal.
Roy
Images (Click to enlarge)
May 23, 2019 at 5:11 AM
That looks like a wheel sensor.
May 23, 2019 at 9:20 AM
That's correct. The ABS sensors send a signal to the PCM and it is translated to vehicle speed by the rotation of the rear wheels.
That's why I said I doubt it is a sensor at all.
Roy
That's why I said I doubt it is a sensor at all.
Roy
May 23, 2019 at 9:24 AM
That is what it came up as left wheel sensor now.
May 23, 2019 at 10:14 AM
What came up.
Roy
Roy
May 23, 2019 at 10:52 AM
Left wheel ABS an speed all of wheel sensor came up. I reset them and all went of except left it came on instantly so i took that out. An get one tomorrow it probably did not help that both CV joints need to be replaced. i have um right in the box my mechanic hurt his back two weeks ago an he could not do them. I would do them but i don't have a press an the left one is going to have to be pressed out.
May 23, 2019 at 11:33 AM
Okay, when you get that replaced and install the new sensor, you should have this resolved.
Roy
Roy
May 23, 2019 at 9:59 PM
🔧 Tools & Auto Repair Parts
Find automotive tools, diagnostic equipment, and replacement
parts for your next repair.
Shop on Amazon →
Paid affiliate link. As an Amazon Associate, we earn from qualifying purchases.