P2472: Exhaust Gas Temperature Sensor Circuit Intermittent/Erratic Bank 1 Sensor 4
The P2472 code indicates that the Engine Control Module (ECM) has detected an intermittent or erratic signal from the exhaust gas temperature (EGT) sensor located at Bank 1, Sensor 4. This sensor monitors exhaust temperature to protect the diesel particulate filter (DPF) and other aftertreatment components. An intermittent signal can be caused by wiring issues, connector corrosion, or a failing sensor. If left unchecked, it may lead to incorrect regeneration events, reduced fuel economy, or potential damage to the exhaust system.
01. Most Common Causes
- Faulty exhaust gas temperature sensor
- Damaged or corroded wiring/connectors
- Intermittent short or open in the sensor circuit
- ECM software issues or programming errors
02. Symptoms You Will Notice
- Check Engine Light illuminated
- Reduced engine performance or power
- Poor fuel economy
- DPF regeneration issues or frequent regeneration cycles
03. Step-by-Step Diagnosis
Step 1: Use an OBD2 scanner to confirm the code and check for related codes.
Step 2: Visually inspect the EGT sensor and its wiring for damage, corrosion, or loose connections.
Step 3: Test the sensor resistance and compare to manufacturer specifications.
Step 4: Check for intermittent issues by wiggling the wiring harness while monitoring the sensor signal with a scan tool.
Step 5: If necessary, replace the sensor and clear the code.
04. Commonly Affected Makes
05. Frequently Asked Questions
Is it safe to drive with this code?▼
It is generally not recommended to drive for extended periods with this code, as it can lead to improper DPF regeneration and potential exhaust system damage. However, short trips to a repair shop are usually acceptable.
How much does it cost to fix?▼
The cost typically ranges from $50 to $150 for a DIY replacement of the sensor, or $100 to $300 if professionally installed, including parts and labor.