P2162 Fault Code

Vehicle Speed Sensor A/B Correlation

• What does that mean?
• Symptoms
• Causes
• Solutions

The P2162 fault code indicates a correlation issue between the vehicle speed sensor A and sensor B. These sensors are critical in providing data to the vehicle's engine control unit for optimal performance. When there is a discrepancy in the readings from these two sensors, it can lead to various operational issues.

What are the symptoms of the P2162 code?

Common symptoms associated with a P2162 fault code include:

• Erratic or unstable speedometer readings.
• Poor engine performance or hesitations during acceleration.
• Traction control or anti-lock brake system activation issues.
• Check engine light illumination on the dashboard.

What causes the P2162 code?

The primary causes of a P2162 code include:

• Faulty vehicle speed sensors (either A or B).
• Wiring issues such as shorts, breaks, or corrosion in the sensor harness.
• Poor connections at the sensor terminals or the ECU.
• Malfunctions in the engine control module itself.
• Problems with the wheel speed sensors that can affect speed readings.

How to fix P2162?

To resolve a P2162 code, consider the following steps:

• Inspect the vehicle speed sensors for any signs of damage or wear. Replace faulty sensors as necessary.
• Check the wiring and connectors for any signs of damage or corrosion and repair or replace them.
• Use a diagnostic scanner to clear the error codes and monitor the vehicle speed data to ensure both sensors are functioning correctly.
• If the issue persists after addressing the sensors and wiring, deeper diagnostics may be required to check the engine control module.