What Does P2084 Mean?
The exhaust gas temperature (EGT) sensor downstream of the catalytic converter on Bank 1 is reading values outside the expected range or not responding correctly to temperature changes. This indicates the sensor is providing implausible data compared to engine operating conditions.
Common Causes
45%
Faulty exhaust gas temperature sensor
30%
Corroded or damaged wiring and connectors in EGT sensor circuit
15%
Exhaust leaks near sensor affecting readings
10%
ECM/PCM internal fault
Diagnostic Steps
1
Step 1: Inspect EGT sensor wiring and connector for corrosion, damage, or loose connections
2
Step 2: Measure sensor resistance and compare to manufacturer specifications (typically 200-400 ohms at room temperature)
3
Step 3: Monitor live sensor data with engine at operating temperature and compare to expected values (typically 300-900°F)
4
Step 4: Check for exhaust leaks near the sensor location
5
Step 5: If all checks pass, replace EGT sensor and retest
Estimated Repair Cost
$150 - $450
Parts + labor, varies by vehicle and location
The exhaust gas temperature (EGT) sensor downstream of the catalytic converter on Bank 1 is reading values outside the expected range or not responding correctly to temperature changes. This indicates the sensor is providing implausible data compared to engine operating conditions.
The most common cause of P2084 (Exhaust Gas Temperature Sensor Circuit Range/Performance Bank 1 Sensor 2) is: Faulty exhaust gas temperature sensor
Typical repair costs for P2084 range from $150 to $450, depending on the vehicle, location, and whether you do it yourself or go to a shop.
Vehicle is safe to drive but may experience reduced fuel economy and increased emissions. Long-term operation may damage catalytic converter.
Start by connecting an OBD2 scanner to read the code and any freeze frame data. Then follow the diagnostic steps specific to P2084 to identify the root cause.
OBDHut Mobile App
Scan codes directly from your car with the OBDHut app.
Coming Soon
Quick Info
Category
Powertrain
System
Emissions Control System
Difficulty
Type
Generic (SAE)
Recommended Tools
OBD2 Scanner
A quality scan tool helps you read codes, view live data, and clear faults.
