Exhaust Gas Temperature Sensor Circuit Range/Performance Bank 2 Sensor 5
The P2488 code indicates that the Engine Control Module (ECM) has detected a malfunction in the exhaust gas temperature (EGT) sensor circuit for Bank 2, Sensor 5. This sensor is typically located downstream in the exhaust system, often after the diesel particulate filter (DPF) or selective catalytic reduction (SCR) system. The ECM monitors the sensor's voltage and compares it to expected values; if the signal is out of range or the response time is too slow, this code sets. Common causes include a faulty EGT sensor, wiring issues, exhaust leaks, or a malfunctioning ECM.
01. Most Common Causes
- Faulty exhaust gas temperature sensor
- Damaged or corroded wiring/connectors
- Exhaust system leaks near the sensor
- Malfunctioning ECM
02. Symptoms You Will Notice
- Check Engine Light illuminated
- Reduced fuel efficiency
- Possible regeneration issues in diesel vehicles
- Decreased engine performance
03. Step-by-Step Diagnosis
Step 1: Scan for additional codes and freeze frame data.
Step 2: Visually inspect the EGT sensor and wiring for damage or corrosion.
Step 3: Test sensor resistance and voltage with a multimeter and compare to specs.
Step 4: Check for exhaust leaks near the sensor location.
Step 5: If all else fails, replace the sensor and clear codes.
04. Commonly Affected Makes
05. Frequently Asked Questions
Is it safe to drive with this code?▼
It is generally not recommended to drive long distances with this code, as it can lead to reduced fuel economy, potential damage to the DPF or SCR system, and increased emissions. Short trips may be okay, but have it diagnosed promptly.
How much does it cost to fix?▼
The cost to replace an EGT sensor typically ranges from $50 to $150 for the part, plus labor if done by a shop. DIY replacement can save on labor costs.