P2161

Vehicle Speed Sensor B Circuit Intermittent/Erratic/High

Severity

⚠️ Medium

Can you drive?

Limited driving only, diagnose soon

Approx. repair cost

$17–56 (est.)

Symptoms

Unstable speedometer readings
Disabling cruise control
Incorrect gear shifting
Check engine light comes on
Errors in ABS or ESP operation

Causes

Damage to the sensor wiring harness
Oxidation or corrosion of contacts
Speed sensor B fault
Circuit Grounding Problems
Mechanical damage to the sensor gear

How to Fix

Check the integrity of the sensor wiring harness
Clean and check connector contacts
Check sensor resistance and voltage
Replace speed sensor B if necessary
Check the condition of the sensor gear

Related codes

P0500 P0501 P0502