What Does P2473 Mean?
The exhaust gas temperature sensor 4 circuit on bank 2 has a general circuit malfunction detected by the PCM. This is a comprehensive code indicating any circuit issue including opens, shorts, or signal problems on the bank 2 sensor 4.
Common Causes
35%
Failed or damaged EGT sensor 4 on bank 2
30%
Wiring harness damage, open circuit, or short circuit
20%
Corroded or damaged connector terminals at sensor
10%
Poor ground connection in sensor circuit
5%
PCM internal fault in bank 2 EGT sensor 4 circuit
Diagnostic Steps
1
Step 1: Visually inspect bank 2 EGT sensor 4 and connector for obvious damage, corrosion, or loose connections
2
Step 2: Disconnect sensor and measure resistance across sensor terminals; compare to manufacturer specifications
3
Step 3: Check continuity of all wires from sensor connector to PCM; verify ground circuit integrity
4
Step 4: With sensor disconnected, check for 5V reference voltage at sensor connector with key on
5
Step 5: Replace EGT sensor 4 if testing shows sensor fault; verify wiring repairs if circuit faults found
Estimated Repair Cost
$150 - $450
Parts + labor, varies by vehicle and location
The exhaust gas temperature sensor 4 circuit on bank 2 has a general circuit malfunction detected by the PCM. This is a comprehensive code indicating any circuit issue including opens, shorts, or signal problems on the bank 2 sensor 4.
The most common cause of P2473 (Exhaust Gas Temperature Sensor Circuit Bank 2 Sensor 4) is: Failed or damaged EGT sensor 4 on bank 2
Typical repair costs for P2473 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 but may have reduced performance or enter limp mode. DPF regeneration on bank 2 will be compromised, risking filter damage over time.
Start by connecting an OBD2 scanner to read the code and any freeze frame data. Then follow the diagnostic steps specific to P2473 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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