P2470 2017 GMC Sierra Code - Exhaust Gas Temperature Sensor 4 Circuit Low Voltage
Quick Answer
The Exhaust Gas Temperature sensors (EGTS) are variable resistors that measure the temperature of the exhaust gas. Common causes include Faulty Exhaust Gas Temperature Sensor (EGTS) 4, Exhaust Gas Temperature Sensor 4 harness is open or shorted, Exhaust Gas Temperature Sensor 4 circuit poor electrical connection. Severity is Moderate - service should be scheduled soon. The vehicle may still be drivable for short trips if it runs normally, but avoid hard driving and repair it soon.
- What it means
- P2470 2017 GMC Sierra indicates Exhaust Gas Temperature Sensor 4 Circuit Low Voltage.
- Common causes
- Common causes include Faulty Exhaust Gas Temperature Sensor (EGTS) 4, Exhaust Gas Temperature Sensor 4 harness is open or shorted, Exhaust Gas Temperature Sensor 4 circuit poor electrical connection.
- Severity
- Moderate - service should be scheduled soon.
- Can I drive?
- The vehicle may still be drivable for short trips if it runs normally, but avoid hard driving and repair it soon.
Code P2470 2017 GMC Sierra Description
What are the Possible Causes of the DTC P2470 2017 GMC Sierra?
- Faulty Exhaust Gas Temperature Sensor (EGTS) 4
- Exhaust Gas Temperature Sensor 4 harness is open or shorted
- Exhaust Gas Temperature Sensor 4 circuit poor electrical connection
- Faulty Engine Control Module (ECM)
How to Fix the DTC P2470 2017 GMC Sierra?
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.
Code Tech Notes
What is the Cost to Diagnose the Code?
Labor: 1.0
To diagnose the P2470 2017 GMC Sierra 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 P2470 2017 GMC Sierra Code
1. What does the OBDII code P2470 mean on a 2017 GMC Sierra?
P2470 indicates a low voltage issue in the circuit of Exhaust Gas Temperature (EGT) Sensor 4, which monitors exhaust temperatures for emissions control.
2. What are the common symptoms of code P2470 in a 2017 GMC Sierra?
Symptoms may include a check engine light, reduced fuel efficiency, poor engine performance, and possible activation of limp mode.
3. What causes the P2470 code to appear on a GMC Sierra?
Common causes include a faulty EGT sensor, damaged wiring or connectors, corrosion in the sensor circuit, or an issue with the engine control module (ECM).
4. Can I drive my 2017 GMC Sierra with code P2470?
While it may be possible to drive with this code, it is not recommended as it can lead to increased emissions, reduced performance, or damage to the exhaust system.
5. How do I diagnose the P2470 code on my GMC Sierra?
Start by inspecting the EGT Sensor 4 wiring and connectors for damage or corrosion. Use a multimeter to test the sensor’s voltage and resistance. If necessary, scan the ECM for additional codes.
6. How can I fix the P2470 code on a 2017 GMC Sierra?
Repairs may include replacing the faulty EGT sensor, repairing or replacing damaged wiring, cleaning corroded connectors, or, in rare cases, reprogramming or replacing the ECM.
7. Where is Exhaust Gas Temperature Sensor 4 located on a GMC Sierra?
Sensor 4 is typically located downstream on the exhaust system, near the Diesel Particulate Filter (DPF) or catalytic converter.
8. How much does it cost to repair the P2470 code on a GMC Sierra?
Repair costs can vary but generally range from $150 to $300, depending on whether the EGT sensor or wiring needs replacement.
9. Can a dirty Diesel Particulate Filter cause the P2470 code?
While a clogged DPF itself doesn’t directly cause P2470, it can lead to higher exhaust temperatures that may damage the EGT sensor or its circuit.
10. How can I prevent the P2470 code in the future?
Regularly inspect and maintain the exhaust system, ensure the DPF is clean, and address wiring or sensor issues promptly to avoid circuit damage.
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