What Does P2471 Mean?
The exhaust gas temperature sensor 4 on bank 1 is reporting a voltage signal higher than the maximum threshold expected by the PCM. This typically indicates an open circuit in the sensor wiring, a failed sensor, or loss of ground connection.
Common Causes
40%
Open circuit in EGT sensor 4 or failed heating element
25%
Broken or disconnected wiring in sensor circuit
20%
Corroded connector causing high resistance or open circuit
10%
Poor ground connection at sensor or PCM
5%
PCM internal circuit failure on EGT input channel
Diagnostic Steps
1
Step 1: Inspect EGT sensor 4 connector for proper seating, bent pins, or corrosion
2
Step 2: Disconnect sensor and measure resistance across sensor terminals; should show proper resistance per specifications
3
Step 3: Check continuity of signal and ground wires from sensor connector to PCM; should show less than 1 ohm
4
Step 4: Verify 5V reference voltage at sensor connector with key on, engine off
5
Step 5: If wiring and voltage are correct, replace EGT sensor 4; if issue persists, diagnose PCM
Estimated Repair Cost
$150 - $450
Parts + labor, varies by vehicle and location
The exhaust gas temperature sensor 4 on bank 1 is reporting a voltage signal higher than the maximum threshold expected by the PCM. This typically indicates an open circuit in the sensor wiring, a failed sensor, or loss of ground connection.
The most common cause of P2471 (Exhaust Gas Temperature Sensor Circuit High Bank 1 Sensor 4) is: Open circuit in EGT sensor 4 or failed heating element
Typical repair costs for P2471 range from $150 to $450, depending on the vehicle, location, and whether you do it yourself or go to a shop.
Vehicle is safe to drive short-term but may experience reduced performance. DPF regeneration will be impaired, potentially causing filter clogging and expensive repairs if not addressed.
Start by connecting an OBD2 scanner to read the code and any freeze frame data. Then follow the diagnostic steps specific to P2471 to identify the root cause.
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Quick Info
Category
Powertrain
System
Emissions Control System
Difficulty
Type
Generic (SAE)
Recommended Tools
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