What Does P246A Mean?
The exhaust gas temperature sensor 3 on bank 2 is providing erratic or intermittent readings that don't follow expected patterns. This indicates an unreliable signal affecting DPF regeneration and emissions monitoring.
Common Causes
40%
Intermittent wiring connection or damaged harness
25%
Corroded or loose connector terminals at sensor
20%
Failing EGT sensor with internal degradation
10%
Water intrusion or contamination in connector
5%
Poor ground connection in EGT circuit
Diagnostic Steps
1
Step 1: Inspect connector and terminals for corrosion, looseness, or water intrusion; clean and apply dielectric grease if needed
2
Step 2: Perform wiggle test on wiring harness while monitoring live EGT sensor data to identify intermittent connections
3
Step 3: Check for voltage drops across connector pins under load conditions
4
Step 4: Monitor EGT sensor signal during temperature changes (cold start through warm-up) for irregular patterns
5
Step 5: Replace sensor if wiring and connections test normal but intermittent signal persists
Estimated Repair Cost
$175 - $500
Parts + labor, varies by vehicle and location
The exhaust gas temperature sensor 3 on bank 2 is providing erratic or intermittent readings that don't follow expected patterns. This indicates an unreliable signal affecting DPF regeneration and emissions monitoring.
The most common cause of P246A (Exhaust Gas Temperature Sensor Circuit Intermittent/Erratic Bank 2 Sensor 3) is: Intermittent wiring connection or damaged harness
Typical repair costs for P246A range from $175 to $500, depending on the vehicle, location, and whether you do it yourself or go to a shop.
Vehicle is generally safe to drive but may experience reduced performance or failed DPF regeneration. Prolonged operation may cause DPF clogging.
Start by connecting an OBD2 scanner to read the code and any freeze frame data. Then follow the diagnostic steps specific to P246A to identify the root cause.
OBDHut Mobile App
Scan codes directly from your car with the OBDHut app.
Coming Soon
Quick Info
Category
Powertrain
System
Emissions Control System
Difficulty
Type
Generic (SAE)
Recommended Tools
OBD2 Scanner
A quality scan tool helps you read codes, view live data, and clear faults.
