P0500
ModerateP0500 — Vehicle Speed Sensor Malfunction
Description
What the code means
P0500 sets when the DME doesn't receive a valid signal from the vehicle speed sensor. On N55 engines, the cause can be a failed sensor itself or a wiring problem. The sensor is usually mounted on the transmission.
Without a reliable speed signal, the control module loses the data it needs for several functions: the speedometer, cruise control, and the shift logic of the automatic transmission.
Symptoms
Symptoms
- Check Engine light is on.
- The speedometer may not work.
- Cruise control is disabled.
- Transmission shifting may be erratic.
Causes and fixes
Diagnosis and repair
Step 1. Check the wiring and connector
Inspect the speed sensor wiring and connector for damage, corrosion, or a poor contact. A broken circuit is a common cause of a missing signal on the N55.
Step 2. Replace the sensor
If the sensor has failed, replace it. The OEM part number is 62148383644.
Step 3. Check for related codes
Read the transmission fault memory: related drivetrain codes help separate a failed sensor from a problem in the automatic transmission circuit.
Possible secondary damage
Secondary problems
- An incorrect speed signal can cause improper transmission shifts, which accelerates wear on its components. Don't put off the repair.