OBD Guide
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B181E

Hood Ajar Input Circuit Open

B181E is an OBD-II diagnostic trouble code meaning: Hood Ajar Input Circuit Open. Common causes: broken wires in the sensor circuit, malfunction of the hood opening sensor. Estimated repair cost: $11–56.

Severity
⚠️ Medium
Can you drive?
Do not drive — repair immediately
Approx. repair cost
$11–56 (est.)

Symptoms

  • Fault indicator is on
  • Alarms may go off for no reason
  • Problems with arming the car

Causes

  • Broken wires in the sensor circuit
  • Malfunction of the hood opening sensor
  • Poor contact in connectors
  • Short circuit in the circuit

How to Fix

  1. Check the integrity of the wires in the sensor circuit
  2. Inspect the sensor connectors for oxidation or damage.
  3. Check the functionality of the hood opening sensor
  4. If necessary, replace the sensor or repair the wiring

Related codes

B181FB1820

FAQ

What does the B181E code mean?

B181E is an OBD-II diagnostic trouble code that indicates: Hood Ajar Input Circuit Open

What causes a B181E error code?

The most common causes of B181E include: Broken wires in the sensor circuit; Malfunction of the hood opening sensor; Poor contact in connectors; Short circuit in the circuit.

How do I fix a B181E diagnostic trouble code?

To fix B181E: Check the integrity of the wires in the sensor circuit. Inspect the sensor connectors for oxidation or damage.. Check the functionality of the hood opening sensor. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with B181E?

Do not drive — repair immediately

How much does it cost to fix B181E?

The estimated repair cost for B181E is $11–56. Actual cost depends on your vehicle, location, and labor rates.

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See also: Russian version · NationStat