P2160 Fault Code

Vehicle Speed Sensor B Circuit Low

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

The P2160 fault code indicates an issue with the Vehicle Speed Sensor B Circuit being too low. This code is generated when the Engine Control Module (ECM) detects a voltage that is less than the expected range coming from the Vehicle Speed Sensor (VSS) B. The VSS is responsible for providing vehicle speed information to the ECM, which is crucial for various vehicle functions, including transmission shifting and engine performance.

What are the symptoms of the P2160 code?

Drivers may experience various symptoms when this fault code is present, which can include:

• Erratic or unstable speedometer readings
• Transmission shifting issues, such as harsh or delayed shifts
• Activation of the check engine light
• Decreased fuel efficiency due to improper engine management
• Potential for the vehicle to go into 'limp mode' to protect against further damage.

What causes the P2160 code?

Several factors can lead to this fault code, including:

• A faulty Vehicle Speed Sensor B
• Damaged or corroded wiring or connectors within the VSS circuit
• A malfunctioning ECM that fails to process the signal correctly
• Issues with the vehicle's electrical system, such as low battery voltage
• Poor connections at the sensor or within the harness.

How to fix P2160?

To resolve the P2160 code, the following steps can be taken:

• Begin by visually inspecting the Vehicle Speed Sensor B, wiring, and connectors for any signs of damage or corrosion.
• Test the Vehicle Speed Sensor B using a multimeter to ensure it is functioning within normal specifications.
• Repair or replace any damaged wiring or connectors that are found in the circuit.
• If the sensor is faulty, replacing it will often resolve the issue.
• Clear the fault codes and perform a test drive to ensure the issue is resolved.
• If the problem persists, further diagnostics may be needed, including checking the ECM for faults.