What Does P2466 Mean?
The ECM has detected an electrical circuit fault with the exhaust gas temperature sensor 3 on Bank 2. This sensor is typically located after the DPF and monitors temperatures for regeneration control and system protection.
Common Causes
35%
Damaged or broken wiring to EGT sensor 3
30%
Faulty exhaust gas temperature sensor 3
20%
Corroded or loose sensor connector
10%
Short to ground or power in sensor circuit
5%
ECM internal fault
Diagnostic Steps
1
Step 1: Visually inspect EGT sensor 3 wiring and connector on Bank 2 for damage, heat damage, or corrosion
2
Step 2: Measure resistance of EGT sensor 3 at various temperatures and compare to specifications
3
Step 3: Check for voltage supply and ground at sensor connector with key on
4
Step 4: Test circuit continuity and resistance between sensor connector and ECM pins
5
Step 5: If circuits test good, replace EGT sensor 3; if circuits are faulty, repair wiring or connectors
Estimated Repair Cost
$200 - $600
Parts + labor, varies by vehicle and location
The ECM has detected an electrical circuit fault with the exhaust gas temperature sensor 3 on Bank 2. This sensor is typically located after the DPF and monitors temperatures for regeneration control and system protection.
The most common cause of P2466 (Exhaust Gas Temperature Sensor Circuit Bank 2 Sensor 3) is: Damaged or broken wiring to EGT sensor 3
Typical repair costs for P2466 range from $200 to $600, depending on the vehicle, location, and whether you do it yourself or go to a shop.
Vehicle is safe to drive but DPF regeneration may not function properly, potentially leading to filter damage. Engine may enter reduced power mode to protect exhaust components.
Start by connecting an OBD2 scanner to read the code and any freeze frame data. Then follow the diagnostic steps specific to P2466 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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