OBD Guide
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C1391

Abnormal Leak Of Accumulator Pressure

C1391 is an OBD-II diagnostic trouble code meaning: Abnormal Leak Of Accumulator Pressure. Common causes: pressure accumulator depressurization, squib malfunction. Estimated repair cost: $56–167.

Severity
🔴 High
Can you drive?
Yes, but get it checked soon
Approx. repair cost
$56–167 (est.)

Symptoms

  • Airbag light is on
  • Belt pretensioners do not work

Causes

  • Pressure accumulator depressurization
  • Squib malfunction
  • Wiring harness damage

How to Fix

  1. Checking the tightness of the accumulation system
  2. Diagnostics of squibs
  3. Checking the wiring harness

Related codes

B0001B0002

FAQ

What does the C1391 code mean?

C1391 is an OBD-II diagnostic trouble code that indicates: Abnormal Leak Of Accumulator Pressure

What causes a C1391 error code?

The most common causes of C1391 include: Pressure accumulator depressurization; Squib malfunction; Wiring harness damage.

How do I fix a C1391 diagnostic trouble code?

To fix C1391: Checking the tightness of the accumulation system. Diagnostics of squibs. Checking the wiring harness. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with C1391?

Yes, but get it checked soon

How much does it cost to fix C1391?

The estimated repair cost for C1391 is $56–167. Actual cost depends on your vehicle, location, and labor rates.

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See also: Russian version · NationStat