P1160 2015 Chevrolet Silverado Code - O2 Reference Voltage Circuit High Voltage (NOx Sensor 1)
Quick Answer
The P1160 code for a 2015 Chevrolet Silverado indicates an issue with the O2 reference voltage circuit being too high in voltage, specifically related to the NOx sensor 1. Common causes include Faulty NOx sensor, Damaged wiring or connectors in the O2 reference voltage circuit, ECM malfunction. 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 2015 Chevrolet Silverado indicates O2 Reference Voltage Circuit High Voltage (NOx Sensor 1).
- Common causes
- Common causes include Faulty NOx sensor, Damaged wiring or connectors in the O2 reference voltage circuit, ECM malfunction.
- 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 2015 Chevrolet Silverado Description
The P1160 code for a 2015 Chevrolet Silverado indicates an issue with the O2 reference voltage circuit being too high in voltage, specifically related to the NOx sensor 1. The NOx sensor is responsible for monitoring the levels of nitrogen oxide in the exhaust gases to ensure compliance with emissions standards. The O2 reference voltage circuit provides a stable voltage signal to the sensor for accurate readings.
Common Causes of P1160 2015 Chevrolet Silverado
- Faulty NOx sensor
- Damaged wiring or connectors in the O2 reference voltage circuit
- ECM malfunction
- Corrosion or contamination in the sensor connections
- Exhaust leaks affecting sensor readings
Symptoms of P1160 2015 Chevrolet Silverado
- Decreased fuel efficiency
- Rough idling or stalling
- Check engine light illuminated
- Failed emissions test
- Reduced engine performance
How to Fix P1160 2015 Chevrolet Silverado
- Use a diagnostic scanner to retrieve the trouble code and confirm the issue.
- Inspect the wiring and connectors in the O2 reference voltage circuit for damage or corrosion.
- Test the NOx sensor for proper function and replace if necessary.
- Clear the trouble code from the ECM and perform a test drive to ensure the issue is resolved.
- If the problem persists, further diagnosis may be needed to identify any underlying issues with the ECM or other components.
Cost to Fix P1160 2015 Chevrolet Silverado
The cost of repairing a P1160 code on a 2015 Chevrolet Silverado can vary depending on the specific cause of the issue. In general, replacing a faulty NOx sensor can cost between $200 and $400, while repairing damaged wiring or connectors may range from $100 to $300. Labor costs at auto repair shops typically range from $80 to $150 per hour, so the total repair bill could amount to several hundred dollars. It's recommended to consult with a professional mechanic for a more accurate estimate based on the specific circumstances of the vehicle.
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Frequently Asked Questions about P1160 2015 Chevrolet Silverado Code
1. What does the OBDII code P1160 mean on a 2015 Chevrolet Silverado?
P1160 indicates an "O2 Reference Voltage Circuit High Voltage" issue related to NOx Sensor 1, meaning the sensor is detecting a higher-than-expected reference voltage.
2. What are the common symptoms of code P1160 on a 2015 Chevrolet Silverado?
Symptoms may include an illuminated check engine light, reduced fuel efficiency, decreased engine performance, and, in some cases, emissions test failure.
3. What causes the P1160 code to appear on a 2015 Chevrolet Silverado?
The code can be triggered by a faulty NOx sensor, damaged wiring or connectors, a short or open circuit, or a malfunctioning engine control module (ECM).
4. How do I diagnose the P1160 code on my 2015 Chevrolet Silverado?
Start by checking the wiring and connectors for damage near NOx Sensor 1, then test the sensor for correct operation and inspect the reference voltage signal using a multimeter or scan tool.
5. Can I drive my 2015 Chevrolet Silverado with the P1160 code?
It’s not recommended to drive extensively with this code, as it may lead to poor engine performance, increased emissions, and potential damage to other components.
6. How do I fix the P1160 code on a 2015 Chevrolet Silverado?
Repairs may include replacing the faulty NOx sensor, repairing damaged wiring or connectors, or reprogramming or replacing the ECM if necessary.
7. Is the P1160 code related to the oxygen sensor on my 2015 Chevrolet Silverado?
No, the code refers to the NOx sensor, which monitors nitrogen oxide levels, not the oxygen sensor that monitors oxygen levels in the exhaust.
8. How much does it cost to repair the P1160 code on a 2015 Chevrolet Silverado?
Repair costs vary depending on the issue, but replacing a NOx sensor typically costs $200–$600, including parts and labor.
9. Can a dirty or clogged exhaust system cause the P1160 code?
While unlikely, a clogged exhaust system can indirectly affect NOx sensor readings, so it’s worth inspecting the exhaust system if other repairs don’t resolve the issue.
10. Does clearing the P1160 code with a scan tool fix the problem?
Clearing the code will turn off the check engine light temporarily, but if the underlying issue is not resolved, the code will return.
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