OBD Guide
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P1937

Vehicle Speed Signal

P1937 is an OBD-II diagnostic trouble code meaning: Vehicle Speed Signal. Common causes: speed sensor malfunction, open or short circuit in the circuit. Estimated repair cost: $17–56.

Severity
⚠️ Medium
Can you drive?
Limited driving only, diagnose soon
Approx. repair cost
$17–56 (est.)

Symptoms

  • Incorrect speedometer readings
  • Disabling cruise control
  • Gear shifting problems
  • Check Engine light comes on

Causes

  • Speed sensor malfunction
  • Open or short circuit in the circuit
  • Wiring Harness Problems
  • Control module malfunction
  • Contact corrosion

How to Fix

  1. Check speed sensor
  2. Check the integrity of the circuit and wiring harness
  3. Clear contacts
  4. Check control module
  5. Replace sensor if necessary

Related codes

P0500P0501P0502

FAQ

What does the P1937 code mean?

P1937 is an OBD-II diagnostic trouble code that indicates: Vehicle Speed Signal

What causes a P1937 error code?

The most common causes of P1937 include: Speed sensor malfunction; Open or short circuit in the circuit; Wiring Harness Problems; Control module malfunction.

How do I fix a P1937 diagnostic trouble code?

To fix P1937: Check speed sensor. Check the integrity of the circuit and wiring harness. Clear contacts. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with P1937?

Limited driving only, diagnose soon

How much does it cost to fix P1937?

The estimated repair cost for P1937 is $17–56. Actual cost depends on your vehicle, location, and labor rates.

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See also: Russian version · NationStat