AutoCodes – Generic – P16AB

P16AB Code - Intake Air Heater Temperature Sensor Circuit High Voltage

Quick Answer

The intake air heater has the ability to perform internal diagnostics for the temperature sensor circuit. Common causes include Faulty Intake Air Heater Temperature Sensor, Intake Air Heater Temperature Sensor harness is open or shorted, Intake Air Heater Temperature Sensor circuit poor electrical connection. Severity is High - diagnose this code as soon as possible. Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.

What it means: P16AB indicates Intake Air Heater Temperature Sensor Circuit High Voltage.
Common causes: Common causes include Faulty Intake Air Heater Temperature Sensor, Intake Air Heater Temperature Sensor harness is open or shorted, Intake Air Heater Temperature Sensor circuit poor electrical connection.
Severity: High - diagnose this code as soon as possible.
Can I drive?: Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.

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Code Popularity 21,090

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

What is this?

Table of contents Created and updated by William Orellana on Jun 14, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P16AB Description

The intake air heater has the ability to perform internal diagnostics for the temperature sensor circuit. The intake air heater monitors the internal temperature sensor voltage and if the voltage falls outside the calibrated threshold, the intake air heater sends a message to the Glow Plug Control Module (GPCM) and then the GPCM sends a message to the Engine Control Module (ECM) to set the appropriate Diagnostic Trouble Code (DTC).

OBDII Code P16AB - Intake Air Heater Temperature Sensor Circuit High Voltage - AutoCodes.com — P16AB Code - Intake Air Heater Temperature Sensor Circuit High Voltage

What does this mean?

What are the Possible Causes of the DTC P16AB?

Faulty Intake Air Heater Temperature Sensor
Intake Air Heater Temperature Sensor harness is open or shorted
Intake Air Heater Temperature Sensor circuit poor electrical connection

How to Fix the DTC P16AB?

Review the 'Possible Causes' above and visually examine the corresponding wiring harness and connectors. Check for damaged components and inspect connector pins for signs of being broken, bent, pushed out, or corroded.

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P16AB code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.

Need more information about the P16AB code?

Need more information on how to fix the P16AB code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P16AB code diagnosed by a professional: Find a repair shop in your area

Information for Specific Makes

P16AB Chevrolet — Intake Air Heater Temperature Sensor Circuit High Voltage
P16AB GMC — Intake Air Heater Temperature Sensor Circuit High Voltage

About the author: William Orellana is a Master Mechanic and Mechanical Engineer with over 30 years of experience diagnosing and repairing vehicles. Learn more about his background.

Frequently Asked Questions about P16AB Code

1. What are the common symptoms of OBDII code P16AB (Intake Air Heater Temperature Sensor Circuit High Voltage)?

The common symptoms include poor engine performance, reduced fuel efficiency, and potential stalling or rough idling.

2. What are the possible causes of OBDII code P16AB?

The code P16AB can be caused by a faulty intake air heater temperature sensor, damaged wiring or connectors, a malfunctioning PCM, or a short circuit in the sensor circuit.

3. How can I diagnose the cause of OBDII code P16AB?

Diagnosing the code involves checking the intake air heater temperature sensor for proper operation, inspecting the wiring and connectors for damage, and using a diagnostic scan tool to read live data and monitor sensor values.

4. Can I drive my vehicle with OBDII code P16AB?

It is not recommended to drive your vehicle with code P16AB as it can lead to further damage and potential safety hazards. It's best to address the issue promptly.

5. How do I repair OBDII code P16AB?

Repairing code P16AB typically involves replacing the intake air heater temperature sensor if it's faulty, repairing any damaged wiring or connectors, and clearing the code with a diagnostic scan tool.

6. Will resetting the OBDII code P16AB make it go away permanently?

Simply resetting the code may clear it temporarily, but if the underlying issue is not addressed, the code is likely to return. Proper diagnosis and repair are necessary for a permanent solution.

7. Can a DIY enthusiast fix OBDII code P16AB at home?

Depending on your skill level and access to tools, DIY enthusiasts may be able to address code P16AB by replacing the sensor or repairing wiring. However, proper diagnosis is crucial to ensure the correct repair.

8. How much does it cost to repair OBDII code P16AB at a mechanic?

The cost of repairing code P16AB at a mechanic can vary based on the underlying issue, labor rates, and the cost of parts. It's advisable to get a few quotes from reputable mechanics in your area.

9. Is OBDII code P16AB a serious issue?

While code P16AB may not cause immediate breakdown or safety concerns, it can lead to poor engine performance and reduced efficiency. Ignoring the code for an extended period can potentially cause further damage.

10. Can extreme weather conditions affect OBDII code P16AB?

Extreme weather conditions, especially cold temperatures, can impact the intake air heater temperature sensor's performance and potentially trigger code P16AB. It's important to keep this in mind when diagnosing the issue.