P040C 2016 Chevrolet Silverado Code - Exhaust Gas Recirculation Temperature Sensor 2 Circuit Low Voltage
Quick Answer
The Exhaust Gas Recirculation (EGR) temperature sensors are variable resistors that measure the temperature of the exhaust gas at the inlet and outlet of the EGR cooler. Common causes include Faulty Exhaust Gas Recirculation (EGR) Temperature Sensor 2, Exhaust Gas Recirculation Temperature Sensor 2 harness is open or shorted, Exhaust Gas Recirculation Temperature Sensor 2 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
- P040C 2016 Chevrolet Silverado indicates Exhaust Gas Recirculation Temperature Sensor 2 Circuit Low Voltage.
- Common causes
- Common causes include Faulty Exhaust Gas Recirculation (EGR) Temperature Sensor 2, Exhaust Gas Recirculation Temperature Sensor 2 harness is open or shorted, Exhaust Gas Recirculation Temperature Sensor 2 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 P040C 2016 Chevrolet Silverado Description
What are the Possible Causes of the DTC P040C 2016 Chevrolet Silverado?
- Faulty Exhaust Gas Recirculation (EGR) Temperature Sensor 2
- Exhaust Gas Recirculation Temperature Sensor 2 harness is open or shorted
- Exhaust Gas Recirculation Temperature Sensor 2 circuit poor electrical connection
- Faulty Engine Control Module (ECM)
How to Fix the DTC P040C 2016 Chevrolet Silverado?
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 P040C 2016 Chevrolet Silverado 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.
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Frequently Asked Questions about P040C 2016 Chevrolet Silverado Code
1. What does the OBDII code P040C mean on a 2016 Chevrolet Silverado?
P040C indicates a problem with the Exhaust Gas Recirculation (EGR) Temperature Sensor 2 circuit, specifically a low voltage signal detected by the powertrain control module (PCM).
2. What are the symptoms of code P040C in a 2016 Chevrolet Silverado?
Common symptoms include an illuminated check engine light, reduced engine performance, poor fuel economy, rough idling, and possible overheating of the EGR system.
3. What causes the P040C code on a 2016 Chevrolet Silverado?
Possible causes include a faulty EGR temperature sensor, damaged wiring or connectors in the EGR sensor circuit, or a malfunctioning PCM.
4. Can I drive my 2016 Chevrolet Silverado with the P040C code?
While the vehicle may still run, driving with this code can lead to reduced performance and potential damage to the EGR system and engine components over time.
5. How do I fix code P040C on a 2016 Chevrolet Silverado?
Repairs might involve replacing the EGR temperature sensor, repairing or replacing damaged wiring or connectors, or reprogramming/updating the PCM if necessary.
6. How is the P040C code diagnosed on a 2016 Chevrolet Silverado?
A mechanic will use a scan tool to confirm the code, inspect the EGR temperature sensor and its circuit for damage, and perform voltage and continuity tests.
7. How much does it cost to fix the P040C code on a 2016 Chevrolet Silverado?
Repair costs can vary but typically range from $100 to $300, depending on whether the EGR temperature sensor or wiring needs replacement.
8. Can a dirty EGR valve cause the P040C code?
While a dirty EGR valve is not a direct cause of this code, it can contribute to EGR system issues that may affect the EGR temperature sensor's performance.
9. Where is the EGR temperature sensor located on a 2016 Chevrolet Silverado?
The EGR temperature sensor is typically mounted on or near the EGR valve or in the EGR cooler, depending on the engine configuration.
10. Will clearing the P040C code fix the issue?
Clearing the code might turn off the check engine light temporarily, but the underlying issue must be repaired to prevent the code from returning.
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