What Does P2472 Mean?
The exhaust gas temperature sensor 4 signal on bank 1 is erratic or intermittent, with readings fluctuating outside normal parameters. This indicates an unstable connection, intermittent short/open, or a sensor that is beginning to fail.
Common Causes
35%
Intermittent connection at sensor connector due to vibration or corrosion
30%
Failing EGT sensor 4 with intermittent internal faults
20%
Damaged wiring harness with intermittent short or open from heat/abrasion
10%
Loose or corroded ground connection creating intermittent signal loss
5%
PCM connector terminal corrosion causing intermittent signal quality issues
Diagnostic Steps
1
Step 1: Wiggle test sensor connector and wiring harness while monitoring live data for signal dropout
2
Step 2: Inspect connector terminals for corrosion, looseness, or signs of overheating
3
Step 3: Check wiring harness routing for contact with hot exhaust components or sharp edges
4
Step 4: Monitor EGT sensor 4 signal with scan tool during drive cycle to capture intermittent fault
5
Step 5: If connector and wiring are secure, replace EGT sensor 4 as internal intermittent failures are common
Estimated Repair Cost
$150 - $500
Parts + labor, varies by vehicle and location
The exhaust gas temperature sensor 4 signal on bank 1 is erratic or intermittent, with readings fluctuating outside normal parameters. This indicates an unstable connection, intermittent short/open, or a sensor that is beginning to fail.
The most common cause of P2472 (Exhaust Gas Temperature Sensor Circuit Intermittent/Erratic Bank 1 Sensor 4) is: Intermittent connection at sensor connector due to vibration or corrosion
Typical repair costs for P2472 range from $150 to $500, depending on the vehicle, location, and whether you do it yourself or go to a shop.
Safe to drive but intermittent sensor operation may cause unexpected regeneration cycles. Continued operation may result in DPF damage or drivability issues if regeneration fails.
Start by connecting an OBD2 scanner to read the code and any freeze frame data. Then follow the diagnostic steps specific to P2472 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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