Exhaust Gas Temperature Sensor Circuit Range/Performance Bank 2 Sensor 5
The P2488 code indicates that the Engine Control Module (ECM) has detected a performance or range issue with the exhaust gas temperature (EGT) sensor located in Bank 2, Sensor 5. This sensor monitors exhaust temperature to protect components like the diesel particulate filter (DPF) or catalytic converter. The ECM compares the sensor's readings to expected values; if the signal is out of range or responds too slowly, the code sets. Common causes include a faulty sensor, wiring issues, or exhaust leaks.
1. Most Common Causes
- Faulty exhaust gas temperature sensor
- Damaged or corroded wiring/connector
- Exhaust system leaks near the sensor
- ECM software issues
2. Symptoms You Will Notice
- Check Engine Light illuminated
- Reduced engine performance or limp mode
- Increased exhaust emissions
- Possible regeneration issues in diesel engines
3. Step-by-Step Diagnosis
Step 1: Scan for codes and record freeze frame data.
Step 2: Visually inspect the EGT sensor and wiring for damage or corrosion.
Step 3: Compare sensor readings with a scan tool to expected values at idle and under load.
Step 4: Test sensor resistance and voltage per manufacturer specifications.
Step 5: Check for exhaust leaks near the sensor location.
4. Frequently Asked Questions
Is it safe to drive with this code?▼
It is not recommended to drive long distances as it can lead to reduced performance, increased emissions, and potential damage to exhaust components like the DPF or catalytic converter.
How much does it cost to fix?▼
The cost typically ranges from $50 to $150 for a DIY sensor replacement, or $200 to $400 if professionally diagnosed and repaired, including parts and labor.
5. Commonly Affected Makes
This is a generic OBD2 code, potentially applicable to any manufacturer using this diagnostic standard.