OBD Guide
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P16AB

Intake Air Heater Temperature Sensor Circuit High Voltage

P16AB is an OBD-II diagnostic trouble code meaning: Intake Air Heater Temperature Sensor Circuit High Voltage. Common causes: air heater temperature sensor malfunction, open or short circuit in the sensor circuit. Estimated repair cost: $17–56.

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

Symptoms

  • Check Engine Light Is On
  • Difficulty starting the engine in cold weather
  • Unstable engine operation
  • Reduced engine power
  • Increased fuel consumption

Causes

  • Air heater temperature sensor malfunction
  • Open or short circuit in the sensor circuit
  • Connector problems or contact corrosion
  • Engine control unit malfunction
  • Wiring harness damage

How to Fix

  1. Check the integrity of the sensor circuit
  2. Check sensor connectors and contacts for corrosion
  3. Replace the air heater temperature sensor if necessary
  4. Check the engine control unit for errors
  5. Repair short circuit or open circuit

Related codes

P16A9P16AAP16AC

FAQ

What does the P16AB code mean?

P16AB is an OBD-II diagnostic trouble code that indicates: Intake Air Heater Temperature Sensor Circuit High Voltage

What causes a P16AB error code?

The most common causes of P16AB include: Air heater temperature sensor malfunction; Open or short circuit in the sensor circuit; Connector problems or contact corrosion; Engine control unit malfunction.

How do I fix a P16AB diagnostic trouble code?

To fix P16AB: Check the integrity of the sensor circuit. Check sensor connectors and contacts for corrosion. Replace the air heater temperature sensor if necessary. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with P16AB?

Yes, but get it checked soon

How much does it cost to fix P16AB?

The estimated repair cost for P16AB is $17–56. Actual cost depends on your vehicle, location, and labor rates.

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