Exhaust Gas Temperature Sensor Circuit Range/Performance Bank 1 Sensor 2
The P2084 code indicates that the Engine Control Module (ECM) has detected a performance or range issue with the exhaust gas temperature (EGT) sensor located after the diesel particulate filter (DPF) on Bank 1, Sensor 2. This sensor monitors exhaust temperature to protect the DPF and catalytic converter from overheating during regeneration. The ECM compares the sensor's signal to expected values; if the signal is out of range or changes too slowly, it sets this code. Common causes include a faulty sensor, wiring issues, exhaust leaks, or a restricted DPF causing abnormal temperatures.
01. Most Common Causes
- Faulty exhaust gas temperature sensor
- Damaged or corroded wiring/connector
- Exhaust leak near the sensor
- Restricted or clogged diesel particulate filter (DPF)
- ECM software issues
02. Symptoms You Will Notice
- Check Engine Light illuminated
- Reduced engine performance or limp mode
- Increased exhaust smoke
- Poor fuel economy
- DPF regeneration issues
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: Compare sensor resistance and voltage readings to manufacturer specifications.
Step 4: Check for exhaust leaks and DPF restriction using a scan tool or pressure gauge.
Step 5: If all else is fine, replace the EGT sensor and clear codes.
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 DPF damage or reduced performance. Short trips to a repair shop are okay.
How much does it cost to fix?▼
Typically $50-$150 for the sensor plus labor, totaling $150-$300 depending on vehicle and shop rates.