OBD Guide
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B1651

Manual Cut-Off Switch Trouble

B1651 is an OBD-II diagnostic trouble code meaning: Manual Cut-Off Switch Trouble. Common causes: open or short circuit in the switch circuit, manual switch malfunction. Estimated repair cost: $22–89.

Severity
⚠️ Medium
Can you drive?
Limited driving only, diagnose soon
Approx. repair cost
$22–89 (est.)

Symptoms

  • Engine won't start
  • The car stalls while driving
  • Check Engine Light Is On

Causes

  • Open or short circuit in the switch circuit
  • Manual switch malfunction
  • Wiring Harness Problems
  • Contact corrosion

How to Fix

  1. Check the continuity of the switch circuit
  2. Inspect contacts for corrosion
  3. Replace manual switch if necessary
  4. Check wiring harness for damage

Related codes

B1650P0230P0627

FAQ

What does the B1651 code mean?

B1651 is an OBD-II diagnostic trouble code that indicates: Manual Cut-Off Switch Trouble

What causes a B1651 error code?

The most common causes of B1651 include: Open or short circuit in the switch circuit; Manual switch malfunction; Wiring Harness Problems; Contact corrosion.

How do I fix a B1651 diagnostic trouble code?

To fix B1651: Check the continuity of the switch circuit. Inspect contacts for corrosion. Replace manual switch if necessary. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with B1651?

Limited driving only, diagnose soon

How much does it cost to fix B1651?

The estimated repair cost for B1651 is $22–89. Actual cost depends on your vehicle, location, and labor rates.

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See also: Russian version · NationStat