AutoCodes – GMC – P16AB GMC

P16AB GMC 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 GMC 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 2,552

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

What does this mean?

What are the Possible Causes of the DTC P16AB GMC?

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 GMC?

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 GMC 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 GMC code?

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

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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 GMC Code

1. What are the common symptoms of OBDII code P16AB GMC?

- Common symptoms include the Check Engine Light turning on, rough idling, decreased fuel efficiency, and potential engine stalling.

2. What causes the Intake Air Heater Temperature Sensor Circuit High Voltage error code P16AB in a GMC vehicle?

- The P16AB code is often triggered by a faulty intake air heater temperature sensor, damaged wiring or connectors, or issues with the intake air heater system.

3. How can I diagnose the Intake Air Heater Temperature Sensor Circuit High Voltage error code P16AB?

- Diagnosing P16AB involves using an OBDII scanner to retrieve the code, inspecting the intake air heater system components, testing the sensor for proper voltage, and checking the wiring for any damage.

4. Is it safe to continue driving with the OBDII code P16AB GMC triggered?

- It is not recommended to drive with the P16AB code active, as it can lead to poor engine performance and potential damage if left unresolved.

5. What are some DIY repair tips for fixing the Intake Air Heater Temperature Sensor Circuit High Voltage error code P16AB?

- DIY repair tips include checking and cleaning the sensor connections, inspecting the wiring harness for any signs of wear or corrosion, and replacing the intake air heater temperature sensor if necessary.

6. Can a mechanic easily fix the P16AB code in a GMC vehicle?

- A qualified mechanic can diagnose and repair the P16AB code efficiently by using specialized tools and expertise to identify the exact cause and perform the necessary repairs.

7. How much does it typically cost to repair the Intake Air Heater Temperature Sensor Circuit High Voltage error code P16AB?

- The cost of repairing the P16AB code can vary depending on the extent of the issue, but it may involve replacing the intake air heater temperature sensor, which can range from $100 to $300 including labor.

8. Are there any preventative maintenance steps to avoid the OBDII code P16AB in the future?

- Regularly inspecting and maintaining the intake air heater system, checking the sensor connections, and addressing any issues promptly can help prevent the recurrence of the P16AB error code.

9. Can other vehicle systems be affected by the presence of the P16AB code in a GMC vehicle?

- Yes, the P16AB code can impact the overall engine performance and emissions control system, potentially leading to further complications if not addressed in a timely manner.