OBD Guide
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B1492

Ignition Cylinder Sensor Open Circuit

B1492 is an OBD-II diagnostic trouble code meaning: Ignition Cylinder Sensor Open Circuit. Common causes: broken wires in the harness, oxidation of sensor contacts. Estimated repair cost: $33–111.

Severity
⚠️ Medium
Can you drive?
Limited driving only, diagnose soon
Approx. repair cost
$33–111 (est.)

Symptoms

  • Problems starting the engine
  • The 'Check Engine' light is on
  • Engine stalls after starting
  • Immobilizer activation
  • It is impossible to turn off the ignition

Causes

  • Broken wires in the harness
  • Oxidation of sensor contacts
  • Malfunction of the ignition cylinder sensor itself
  • Short circuit in the circuit
  • Problems with the sensor connector

How to Fix

  1. Check the wiring harness for breaks or damage
  2. Inspect the sensor contacts and connector for corrosion
  3. Check the sensor resistance with a multimeter
  4. Replace the sensor if it is faulty
  5. Clear contacts and reconnect

Related codes

B1491P0510U0151

FAQ

What does the B1492 code mean?

B1492 is an OBD-II diagnostic trouble code that indicates: Ignition Cylinder Sensor Open Circuit

What causes a B1492 error code?

The most common causes of B1492 include: Broken wires in the harness; Oxidation of sensor contacts; Malfunction of the ignition cylinder sensor itself; Short circuit in the circuit.

How do I fix a B1492 diagnostic trouble code?

To fix B1492: Check the wiring harness for breaks or damage. Inspect the sensor contacts and connector for corrosion. Check the sensor resistance with a multimeter. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with B1492?

Limited driving only, diagnose soon

How much does it cost to fix B1492?

The estimated repair cost for B1492 is $33–111. Actual cost depends on your vehicle, location, and labor rates.

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See also: Russian version · NationStat