Exhaust Gas Temperature Sensor Circuit Intermittent/Erratic Bank 1 Sensor 5
The P2484 code indicates an intermittent or erratic signal from the exhaust gas temperature (EGT) sensor located in Bank 1, Sensor 5 (typically downstream of the diesel particulate filter or selective catalytic reduction system). This sensor monitors exhaust temperature for emissions control and regeneration events. An intermittent signal can cause improper regeneration, reduced fuel economy, and potential damage to exhaust components. Common causes include a faulty sensor, damaged wiring, poor electrical connections, or exhaust leaks near the sensor.
01. Most Common Causes
- Faulty exhaust gas temperature sensor
- Damaged or corroded wiring/connector
- Exhaust leak near sensor
- Intermittent short or open circuit
02. Symptoms You Will Notice
- Check Engine Light illuminated
- Reduced fuel economy
- Poor engine performance
- Failed emissions test
- DPF regeneration issues
03. Step-by-Step Diagnosis
Step 1: Scan for codes and record freeze frame data.
Step 2: Visually inspect EGT sensor wiring and connector for damage, corrosion, or loose connections.
Step 3: Use a multimeter to check sensor resistance and compare to manufacturer specifications.
Step 4: Monitor sensor voltage with a scan tool while wiggling the harness to reproduce the intermittent fault.
Step 5: Check for exhaust leaks near the sensor that could cause erratic readings.
04. Commonly Affected Makes
05. Frequently Asked Questions
Is it safe to drive with this code?▼
It is not recommended to drive long distances as it can lead to improper DPF regeneration, reduced fuel economy, and potential damage to exhaust components. Short trips to a repair shop are acceptable.
How much does it cost to fix?▼
The cost typically ranges from $150 to $400, including parts and labor. The sensor itself costs $50-$150, and labor is about $100-$250 depending on accessibility.