P16AA Code - Intake Air Heater Temperature Sensor Circuit Low 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
- P16AA indicates Intake Air Heater Temperature Sensor Circuit Low 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.
Code P16AA Description
What are the Possible Causes of the DTC P16AA?
- 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 P16AA?
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 P16AA 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 P16AA code?
Need more information on how to fix the P16AA code? Get Access to Factory Service Manuals
Need Help with the Code?
Get the P16AA code diagnosed by a professional: Find a repair shop in your area
Information for Specific Makes
- P16AA Chevrolet — Intake Air Heater Temperature Sensor Circuit Low Voltage
- P16AA GMC — Intake Air Heater Temperature Sensor Circuit Low Voltage
Frequently Asked Questions about P16AA Code
1. What does the OBDII code P16AA mean?
The P16AA code indicates a low voltage issue in the intake air heater temperature sensor circuit, which monitors the temperature of the air entering the engine.
2. What are the common symptoms of the P16AA code?
Symptoms may include the check engine light turning on, reduced engine performance, difficulty starting in cold weather, or increased emissions.
3. What causes the P16AA code to appear?
Common causes include a faulty intake air heater temperature sensor, damaged wiring or connectors, a corroded sensor connection, or issues with the engine control module (ECM).
4. Can I drive with the P16AA code active?
Driving with this code is possible, but it may lead to poor engine performance and starting issues, especially in cold weather. Addressing the issue promptly is recommended.
5. How do I diagnose the P16AA code?
Start by inspecting the intake air heater temperature sensor, its wiring, and connectors for damage or corrosion. Use a multimeter to check the sensor’s voltage and compare it to manufacturer specifications.
6. How do I fix the P16AA code?
Repairs may include replacing the intake air heater temperature sensor, repairing damaged wiring or connectors, or reprogramming or replacing the ECM if necessary.
7. Can a dirty air filter cause the P16AA code?
A dirty air filter is not a direct cause of this code, but it can contribute to reduced engine performance. Ensure the air filter is clean as part of regular maintenance.
8. What tools are needed to troubleshoot the P16AA code?
You’ll need an OBDII scanner, a multimeter, and basic hand tools to inspect and test the sensor circuit.
9. How much does it cost to fix the P16AA code?
The cost varies depending on the issue. Replacing the intake air heater temperature sensor typically costs $50–$200 for parts and labor, while ECM repairs can be more expensive.
10. Can a faulty ECM cause the P16AA code?
Yes, a malfunctioning ECM may fail to properly interpret the sensor’s signals, causing this code to be triggered, though this is less common than sensor or wiring issues.
Discuss the causes and fixes for P16AA OBDII Code
Code P16AA comments
No comments found for this page.
Fix Your Car Smarter
Try the New AutoCodes App!
Get complete OBDII diagnostics, repair solutions, and cost estimates, plus AI chat support on demand.
