P16AE 2018 GMC Sierra Code - Glow Plug Control Module Temperature Sensor Circuit High Voltage
Quick Answer
The diagnostic trouble code P16AE for a 2018 GMC Sierra indicates a problem with the Glow Plug Control Module Temperature Sensor Circuit High Voltage. Common causes include Faulty glow plug control module temperature sensor, Damaged wiring or connectors in the temperature sensor circuit, Corrosion or poor connections in the sensor circuit. 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
- P16AE 2018 GMC Sierra indicates Glow Plug Control Module Temperature Sensor Circuit High Voltage.
- Common causes
- Common causes include Faulty glow plug control module temperature sensor, Damaged wiring or connectors in the temperature sensor circuit, Corrosion or poor connections in the sensor circuit.
- 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 P16AE 2018 GMC Sierra Description
The diagnostic trouble code P16AE for a 2018 GMC Sierra indicates a problem with the Glow Plug Control Module Temperature Sensor Circuit High Voltage. The glow plug control module is responsible for monitoring and controlling the temperature of the glow plugs in a diesel engine. The temperature sensor circuit high voltage error suggests that the voltage in the circuit is above the normal operating range, indicating a potential issue with the temperature sensor or its wiring.
Common Causes of P16AE 2018 GMC Sierra
- Faulty glow plug control module temperature sensor
- Damaged wiring or connectors in the temperature sensor circuit
- Corrosion or poor connections in the sensor circuit
- Electrical issues such as a short circuit or high resistance in the circuit
- Software or programming issues with the control module
Symptoms of P16AE 2018 GMC Sierra
- Hard starting or extended cranking time
- Engine misfires or rough idling
- Decreased fuel efficiency
- Illumination of the check engine light
- Increased exhaust emissions
How to Fix P16AE 2018 GMC Sierra
- Begin by diagnosing the glow plug control module temperature sensor circuit using a diagnostic scanner to confirm the P16AE code.
- Inspect the wiring and connectors in the temperature sensor circuit for any damage, corrosion, or poor connections.
- Test the glow plug control module temperature sensor for proper functionality or replace it if necessary.
- Clear the trouble code from the vehicle's computer system and perform a test drive to ensure the issue has been resolved.
- If the problem persists, further diagnostics may be required to identify any underlying electrical issues or software programming errors.
Cost to Fix P16AE 2018 GMC Sierra
The typical repair costs for addressing the P16AE code on a 2018 GMC Sierra can vary depending on the specific cause of the issue. In general, replacing a faulty glow plug control module temperature sensor or repairing wiring/connectors can range from $150 to $300 for parts and labor. However, it's important to note that diagnostic time and labor rates at auto repair shops can vary, with hourly rates typically ranging from $80 to $150. It's advisable to consult with a qualified mechanic or dealership for a more accurate cost estimate based on your location and vehicle specifics.
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Frequently Asked Questions about P16AE 2018 GMC Sierra Code
1. What does the OBDII code P16AE mean on a 2018 GMC Sierra?
P16AE indicates a high voltage issue in the Glow Plug Control Module Temperature Sensor Circuit, which monitors and regulates the glow plug system for proper engine operation.
2. What are the symptoms of the P16AE code in a 2018 GMC Sierra?
Common symptoms include difficulty starting the engine, reduced engine performance, a check engine light, poor fuel efficiency, and potential pre-glow cycle errors in cold weather.
3. What causes the P16AE code to appear?
The code can be triggered by a faulty temperature sensor, damaged wiring or connectors, a malfunctioning glow plug control module, or an electrical short or open circuit.
4. How can I diagnose the P16AE code in my GMC Sierra?
Start by checking for visible damage or corrosion in the wiring and connectors, testing the glow plug control module temperature sensor for proper resistance, and scanning for related codes to pinpoint the issue.
5. Can I still drive with the P16AE code active?
While the vehicle may still run, it could experience poor cold starting and reduced performance. Prolonged driving with this code active can lead to further damage to the glow plug system or engine components.
6. How do I fix the P16AE code on a 2018 GMC Sierra?
Common fixes include repairing or replacing damaged wiring, cleaning or replacing faulty connectors, replacing the temperature sensor, or replacing the glow plug control module if necessary.
7. How much does it cost to repair the P16AE code?
Repair costs vary depending on the issue. Replacing a temperature sensor typically costs $50–$150, while replacing a glow plug control module may range from $300–$600, including labor.
8. Can a weak battery cause the P16AE code?
Yes, a weak or failing battery can cause voltage irregularities that might trigger the P16AE code. Ensure the battery is fully charged and in good condition before further diagnostics.
9. Will clearing the P16AE code fix the issue?
Clearing the code might temporarily remove the check engine light, but it won’t fix the underlying problem. Proper diagnosis and repair are needed to resolve the issue.
10. Is the P16AE code specific to diesel engines?
Yes, the P16AE code is specific to vehicles with diesel engines, as it relates to the glow plug system used to aid cold starts in diesel applications.
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