What Does P247A Mean?
Exhaust gas temperature at Bank 1, Sensor 3 (typically mid-DPF or post-DPF inlet) is reading outside normal parameters. This sensor is critical for DPF regeneration monitoring and protection.
Common Causes
35%
Failed EGT sensor producing incorrect temperature signals
30%
DPF blockage or failure affecting exhaust flow and temperature
18%
Sensor contamination from soot, ash, or oil deposits
12%
Incomplete or failed DPF regeneration attempts
5%
Wiring harness damage from heat exposure
Diagnostic Steps
1
Step 1: Review DPF data including soot load, regeneration attempts, and temperature history
2
Step 2: Monitor all EGT sensors simultaneously during idle and load conditions
3
Step 3: Inspect sensor 3 for carbon buildup or physical damage
4
Step 4: Perform resistance and response testing on EGT sensor 3
5
Step 5: Evaluate DPF differential pressure and consider forced regeneration if blockage suspected
Estimated Repair Cost
$250 - $2,500
Parts + labor, varies by vehicle and location
Exhaust gas temperature at Bank 1, Sensor 3 (typically mid-DPF or post-DPF inlet) is reading outside normal parameters. This sensor is critical for DPF regeneration monitoring and protection.
The most common cause of P247A (Exhaust Gas Temperature Out of Range Bank 1 Sensor 3) is: Failed EGT sensor producing incorrect temperature signals
Typical repair costs for P247A range from $250 to $2,500, depending on the vehicle, location, and whether you do it yourself or go to a shop.
Safe to drive but may prevent DPF regeneration, leading to filter clogging and eventual engine derate. Address promptly to avoid costly DPF replacement.
Start by connecting an OBD2 scanner to read the code and any freeze frame data. Then follow the diagnostic steps specific to P247A 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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