P1160 2018 GMC Sierra Code - O2 Reference Voltage Circuit High Voltage (NOx Sensor 1)
Quick Answer
The P1160 diagnostic trouble code (DTC) for a 2018 GMC Sierra indicates an issue with the O2 reference voltage circuit having a high voltage reading, specifically related to the NOx Sensor 1. Common causes include Faulty NOx sensor, Wiring issues such as shorts or open circuits, Corrosion or damage to sensor connectors. 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
- P1160 2018 GMC Sierra indicates O2 Reference Voltage Circuit High Voltage (NOx Sensor 1).
- Common causes
- Common causes include Faulty NOx sensor, Wiring issues such as shorts or open circuits, Corrosion or damage to sensor connectors.
- 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 P1160 2018 GMC Sierra Description
The P1160 diagnostic trouble code (DTC) for a 2018 GMC Sierra indicates an issue with the O2 reference voltage circuit having a high voltage reading, specifically related to the NOx Sensor 1. The NOx sensor is responsible for monitoring the levels of nitrogen oxide in the exhaust gases and providing feedback to the engine control module (ECM) to adjust fuel delivery and emission levels. When the O2 reference voltage circuit shows high voltage, it means that the sensor is detecting a higher than normal oxygen concentration in the exhaust gases, which can lead to incorrect fuel mixture adjustments and potentially higher emissions.
Common Causes of P1160 2018 GMC Sierra
- Faulty NOx sensor
- Wiring issues such as shorts or open circuits
- Corrosion or damage to sensor connectors
- ECM malfunction
- Exhaust leaks near the sensor
Symptoms of P1160 2018 GMC Sierra
- Decreased fuel efficiency
- Engine misfires or hesitation
- Illumination of the check engine light
- Increased emissions
- Reduced engine power
How to Fix P1160 2018 GMC Sierra
- Begin by conducting a thorough inspection of the NOx sensor and its wiring for any visible damage or corrosion.
- Test the sensor using a multimeter to check for proper voltage output and resistance.
- If the sensor is faulty, replace it with a new OEM sensor and ensure proper installation.
- Check and repair any damaged wiring or connectors in the O2 reference voltage circuit.
- Clear the DTC using a diagnostic scanner and perform a test drive to verify that the issue has been resolved.
Cost to Fix P1160 2018 GMC Sierra
The cost of repairing a P1160 code on a 2018 GMC Sierra can vary depending on the specific cause of the issue. In general, the cost of a new NOx sensor can range from $150 to $300, while labor costs for diagnosis and repair can range from $100 to $300. Overall, the total repair cost for this issue may range from $250 to $600. It's important to note that labor rates at auto repair shops can vary, so it's advisable to check with local shops for more accurate pricing.
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Frequently Asked Questions about P1160 2018 GMC Sierra Code
1. What does the OBDII code P1160 mean on a 2018 GMC Sierra?
P1160 indicates an issue with the O2 Reference Voltage Circuit High Voltage related to NOx Sensor 1, which monitors nitrogen oxide levels in the exhaust.
2. What are the common symptoms of code P1160 on a 2018 GMC Sierra?
Symptoms may include the check engine light turning on, reduced fuel efficiency, poor engine performance, or the vehicle entering limp mode.
3. What causes the P1160 code to appear in a 2018 GMC Sierra?
Common causes include a malfunctioning NOx sensor, damaged wiring or connectors in the O2 reference voltage circuit, or a failed engine control module (ECM).
4. Can I drive my 2018 GMC Sierra with the P1160 code?
While the vehicle may still be drivable, ignoring the issue can lead to decreased performance, increased emissions, and potential damage to the catalytic converter.
5. How can I diagnose the P1160 code on my 2018 GMC Sierra?
Start by inspecting the wiring and connectors for damage or corrosion, then test the NOx sensor and its reference voltage circuit with a multimeter.
6. How do I fix the P1160 code on a 2018 GMC Sierra?
Repairs may involve replacing the faulty NOx sensor, repairing damaged wiring or connectors, or, in rare cases, reprogramming or replacing the ECM.
7. How much does it cost to repair a P1160 code on a 2018 GMC Sierra?
The cost varies depending on the exact issue but typically ranges from $200 to $600, with NOx sensor replacement being the most common expense.
8. Is the P1160 code related to emissions on a 2018 GMC Sierra?
Yes, the P1160 code involves the NOx sensor, essential for monitoring and controlling emissions, which can impact your vehicle's compliance with emission standards.
9. Can a dirty air filter cause the P1160 code on a 2018 GMC Sierra?
No, a dirty air filter is unlikely to cause this specific code, as it primarily relates to the O2 reference voltage circuit and NOx sensor.
10. Does clearing the P1160 code solve the problem on a 2018 GMC Sierra?
Clearing the code may temporarily remove the warning, but the underlying issue must be diagnosed and fixed to prevent the code from returning.
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