OBD Guide
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P1492

Battery Temperature Sensor Voltage Too high

P1492 is an OBD-II diagnostic trouble code meaning: Battery Temperature Sensor Voltage Too high. Common causes: battery temperature sensor malfunction, open or short circuit in wiring. Estimated repair cost: $17–56.

Severity
⚠️ Medium
Can you drive?
Yes, but get it checked soon
Approx. repair cost
$17–56 (est.)

Symptoms

  • Incorrect battery temperature readings
  • Battery charging problems
  • Reduced hybrid system efficiency
  • Check Engine Light Illuminates
  • Unstable electrical system operation

Causes

  • Battery temperature sensor malfunction
  • Open or short circuit in wiring
  • Poor contact in connectors
  • Problems with the ECU
  • Corroded contacts or damaged wiring

How to Fix

  1. Check the resistance of the battery temperature sensor
  2. Inspect wiring and connectors for damage
  3. Check the voltage at the sensor contacts
  4. Replacing the battery temperature sensor if necessary
  5. Check and, if necessary, update the ECU firmware

Related codes

P1491P1493P1494

Error P1492 by Vehicle Brand

DodgeJeepMitsubishiNissanPlymouthPontiac

FAQ

What does the P1492 code mean?

P1492 is an OBD-II diagnostic trouble code that indicates: Battery Temperature Sensor Voltage Too high

What causes a P1492 error code?

The most common causes of P1492 include: Battery temperature sensor malfunction; Open or short circuit in wiring; Poor contact in connectors; Problems with the ECU.

How do I fix a P1492 diagnostic trouble code?

To fix P1492: Check the resistance of the battery temperature sensor. Inspect wiring and connectors for damage. Check the voltage at the sensor contacts. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with P1492?

Yes, but get it checked soon

How much does it cost to fix P1492?

The estimated repair cost for P1492 is $17–56. Actual cost depends on your vehicle, location, and labor rates.

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