OBD Guide
ENFRDEESPT

C1084

Vacuum Pressure Sensor Low

C1084 is an OBD-II diagnostic trouble code meaning: Vacuum Pressure Sensor Low. Common causes: vacuum pressure sensor malfunction, vacuum leak in the system. Estimated repair cost: $56–167.

Severity
⚠️ Medium
Can you drive?
Limited driving only, diagnose soon
Approx. repair cost
$56–167 (est.)

Symptoms

  • Hard braking
  • ABS/ESP indicator is on
  • Reduced brake efficiency

Causes

  • Vacuum pressure sensor malfunction
  • Vacuum leak in the system
  • Open or shorted wiring harness
  • Malfunction of the brake system control unit

How to Fix

  1. Check the integrity of the sensor wiring harness
  2. Check for vacuum leaks in the system
  3. Test vacuum pressure sensor
  4. If necessary, replace the sensor or repair the leak.

Related codes

C1085C1086

FAQ

What does the C1084 code mean?

C1084 is an OBD-II diagnostic trouble code that indicates: Vacuum Pressure Sensor Low

What causes a C1084 error code?

The most common causes of C1084 include: Vacuum pressure sensor malfunction; Vacuum leak in the system; Open or shorted wiring harness; Malfunction of the brake system control unit.

How do I fix a C1084 diagnostic trouble code?

To fix C1084: Check the integrity of the sensor wiring harness. Check for vacuum leaks in the system. Test vacuum pressure sensor. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with C1084?

Limited driving only, diagnose soon

How much does it cost to fix C1084?

The estimated repair cost for C1084 is $56–167. Actual cost depends on your vehicle, location, and labor rates.

FRDEESPT

See also: Russian version · NationStat