P116D 2018 GMC Sierra Code - O2 Pump Current Control Circuit (NOx Sensor 1)
Quick Answer
The P116D diagnostic trouble code (DTC) on a 2018 GMC Sierra relates to the O2 pump current control circuit, specifically for NOx Sensor 1. Common causes include Faulty O2 Pump: A malfunctioning O2 pump can cause issues with the current control circuit, triggering this code, Wiring Issues: Damaged or corroded wiring in the O2 pump current control circuit can disrupt the sensor's operation, Sensor Failure: A failing NOx sensor can also lead to the P116D code being triggered. 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
- P116D 2018 GMC Sierra indicates O2 Pump Current Control Circuit (NOx Sensor 1).
- Common causes
- Common causes include Faulty O2 Pump: A malfunctioning O2 pump can cause issues with the current control circuit, triggering this code, Wiring Issues: Damaged or corroded wiring in the O2 pump current control circuit can disrupt the sensor's operation, Sensor Failure: A failing NOx sensor can also lead to the P116D code being triggered.
- 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 P116D 2018 GMC Sierra Description
The P116D diagnostic trouble code (DTC) on a 2018 GMC Sierra relates to the O2 pump current control circuit, specifically for NOx Sensor 1. This code indicates a problem with the operation of the O2 pump that controls the current in the NOx sensor circuit. The NOx sensor is responsible for monitoring the levels of nitrogen oxide in the exhaust gases to ensure compliance with emissions regulations.
Common Causes of P116D 2018 GMC Sierra
- Faulty O2 Pump: A malfunctioning O2 pump can cause issues with the current control circuit, triggering this code.
- Wiring Issues: Damaged or corroded wiring in the O2 pump current control circuit can disrupt the sensor's operation.
- Sensor Failure: A failing NOx sensor can also lead to the P116D code being triggered.
- ECM Malfunction: A problem with the engine control module (ECM) can prevent proper communication with the O2 pump current control circuit.
Symptoms of P116D 2018 GMC Sierra
- Check Engine Light: The most common symptom associated with this code is the illumination of the check engine light on the dashboard.
- Reduced Fuel Efficiency: A malfunctioning O2 pump current control circuit can lead to decreased fuel efficiency as the engine may not be operating at optimal levels.
- Rough Idle: The engine may experience rough idling or hesitation when the O2 pump current control circuit is not functioning correctly.
- Failed Emissions Test: If the NOx sensor is not operating properly due to this code, the vehicle may fail emissions tests due to higher than allowed nitrogen oxide levels.
How to Fix P116D 2018 GMC Sierra
- Diagnose the Issue: Use a diagnostic scanner to retrieve the DTC and pinpoint the exact cause of the problem.
- Inspect O2 Pump and Wiring: Check the O2 pump and wiring for any signs of damage or corrosion that may be affecting the current control circuit.
- Test NOx Sensor: Verify the functionality of the NOx sensor to determine if it needs to be replaced.
- Replace Faulty Components: Replace any faulty O2 pump, wiring, or NOx sensor to resolve the issue.
- Clear DTC: After completing the repair, clear the DTC and test drive the vehicle to ensure the problem has been resolved.
Cost to Fix P116D 2018 GMC Sierra
The typical repair costs for addressing the P116D code on a 2018 GMC Sierra can vary depending on the specific cause of the issue. In general, replacing a faulty O2 pump, wiring, or NOx sensor can range from $200 to $500, including parts and labor. However, it's important to note that diagnosis time and labor rates at auto repair shops can vary based on factors such as location, vehicle make and model, and engine type. Most auto repair shops charge between $80 and $150 per hour for labor, but rates may be higher in metropolitan areas or at dealerships, while independent shops may offer lower rates. It's recommended to check with local shops for a more accurate estimate based on the specific circumstances.
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Frequently Asked Questions about P116D 2018 GMC Sierra Code
1. What does OBDII code P116D mean on a 2018 GMC Sierra?
P116D refers to an issue with the O2 Pump Current Control Circuit for NOx Sensor 1, indicating a malfunction in the sensor's ability to control oxygen pump current.
2. What are the common symptoms of code P116D?
Symptoms include a check engine light, reduced fuel efficiency, poor engine performance, and possible emission test failures.
3. What causes the P116D code to appear?
Common causes include a faulty NOx sensor, wiring or connector issues in the O2 pump circuit, or a malfunctioning engine control module (ECM).
4. Can I drive my 2018 GMC Sierra with the P116D code?
While the vehicle may still be drivable, ignoring the code could lead to reduced performance and potential damage to the emissions system over time.
5. How do I diagnose the P116D code?
Diagnosis involves scanning for codes, inspecting the NOx sensor and its wiring for damage, testing the O2 pump circuit, and checking the ECM for proper function.
6. How much does it cost to repair the P116D code?
Repair costs can vary but may range from $200 to $800 or more, depending on whether the NOx sensor, wiring, or ECM needs replacement.
7. Can a dirty NOx sensor cause the P116D code?
Yes, a contaminated NOx sensor can cause improper readings, leading to the P116D code.
8. Does the P116D code require NOx sensor replacement?
Not always. The issue could be due to wiring or connector faults, so proper diagnosis is important before replacing the sensor.
9. How do I reset the P116D code after repairs?
You can reset the code using an OBDII scanner, but ensure the issue is fully resolved to prevent the code from returning.
10. Can a faulty ECM cause the P116D code?
Yes, a malfunctioning ECM that fails to properly control the O2 pump circuit can trigger the P116D code, though this is less common.
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