P2471 GMC Code - Exhaust Gas Temperature Sensor 4 Circuit High Voltage
Quick Answer
The P2471 GMC code indicates a problem with Exhaust Gas Temperature Sensor 4 Circuit High Voltage. Common causes include Faulty exhaust gas temperature sensor, Wiring issues or shorts in the sensor circuit, Engine control module malfunction. 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
- P2471 GMC indicates Exhaust Gas Temperature Sensor 4 Circuit High Voltage.
- Common causes
- Common causes include Faulty exhaust gas temperature sensor, Wiring issues or shorts in the sensor circuit, Engine control module malfunction.
- 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.
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Code P2471 GMC Description
The P2471 GMC code indicates a problem with Exhaust Gas Temperature Sensor 4 Circuit High Voltage. This sensor is responsible for monitoring the temperature of the exhaust gases, providing crucial data to the engine control module for optimal performance and emissions control. When the voltage measured by the sensor is too high, it can lead to various issues in the vehicle's systems.
Common Causes of P2471 GMC
- Faulty exhaust gas temperature sensor
- Wiring issues or shorts in the sensor circuit
- Engine control module malfunction
- Exhaust system leaks or damage
- Improper sensor installation or connection
Symptoms of P2471 GMC
- Check engine light illuminated on the dashboard
- Decreased fuel economy
- Engine running rough or misfiring
- Reduced power or acceleration
- Increased emissions
How to Fix P2471 GMC
- Begin by diagnosing the root cause of the high voltage issue using a diagnostic scanner to read the fault codes and sensor data.
- Inspect the exhaust gas temperature sensor and its wiring for any visible damage or corrosion. Replace the sensor if necessary.
- Check the sensor circuit for any shorts or open circuits, repairing or replacing any damaged wiring as needed.
- Clear the fault codes from the engine control module and perform a test drive to ensure the issue has been resolved.
- If the problem persists, further diagnostics may be required to pinpoint the exact cause, such as testing the engine control module or exhaust system components.
Cost to Fix P2471 GMC
The typical repair costs for addressing the P2471 GMC code can vary depending on the specific cause of the issue. In general, replacing the exhaust gas temperature sensor can cost between $100 and $200, including parts and labor. Additional costs may be incurred if wiring repairs or engine control module diagnostics are necessary. It is important to keep in mind that labor rates at auto repair shops can vary, so it is advisable to check local rates for a more accurate estimate.
Tech Notes for P2471 GMC
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Information for Specific GMC Models
- P2471 2014 GMC Sierra — Exhaust Gas Temperature Sensor 4 Circuit High Voltage
- P2471 2015 GMC Sierra — Exhaust Gas Temperature Sensor 4 Circuit High Voltage
- P2471 2016 GMC Sierra — Exhaust Gas Temperature Sensor 4 Circuit High Voltage
- P2471 2017 GMC Sierra — Exhaust Gas Temperature Sensor 4 Circuit High Voltage
- P2471 2018 GMC Sierra — Exhaust Gas Temperature Sensor 4 Circuit High Voltage
Frequently Asked Questions about P2471 GMC Code
What does the OBDII code P2471 mean for a GMC vehicle?
P2471 indicates a high voltage issue in Exhaust Gas Temperature Sensor 4, which monitors exhaust temperatures to protect components like the catalytic converter or diesel particulate filter.
What are the common symptoms of code P2471 on a GMC?
Symptoms may include an illuminated check engine light, poor fuel efficiency, reduced engine performance, or the vehicle entering limp mode.
What causes the P2471 code to appear on a GMC?
Common causes include a faulty exhaust gas temperature sensor, damaged sensor wiring, corrosion in the electrical connectors, or an issue with the engine control module (ECM).
How can I diagnose code P2471 on my GMC?
Start by using a scan tool to confirm the code, then inspect the Exhaust Gas Temperature Sensor 4, its wiring, and connectors for damage or corrosion. Perform voltage and resistance tests on the sensor.
Can I drive my GMC with a P2471 code?
Driving with this code is not recommended as it could lead to damage to the catalytic converter or diesel particulate filter due to inaccurate exhaust temperature readings.
How do I fix the P2471 code on a GMC?
Repairs may include replacing the faulty exhaust gas temperature sensor, repairing damaged wiring or connectors, or reprogramming the ECM if necessary.
Is the P2471 code specific to diesel GMC vehicles?
While more common in diesel vehicles due to their use of multiple exhaust gas temperature sensors, this code can also occur in gasoline engines with similar sensor setups.
How much does it cost to repair code P2471 on a GMC?
The cost can range from $150 to $350, depending on whether the sensor needs replacement or if additional wiring repairs are required.
Can a P2471 code cause long-term damage to my GMC?
Yes, if left unaddressed, it can result in damage to expensive components like the catalytic converter or diesel particulate filter due to incorrect temperature monitoring.
What tools are needed to troubleshoot the P2471 code on a GMC?
You’ll need an OBDII scan tool, a multimeter for testing voltage and resistance, and possibly a wiring diagram for your vehicle’s exhaust system.
Discuss the causes and fixes for P2471 GMC OBDII Code
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