What Does P2085 Mean?
The Bank 1 Sensor 2 exhaust gas temperature sensor circuit is experiencing intermittent signal issues, causing sporadic readings or dropouts. This suggests a connection problem or failing sensor rather than consistent out-of-range readings.
Common Causes
40%
Intermittent wiring connection or damaged wire insulation
35%
Corroded or loose connector terminals
20%
Failing EGT sensor with internal intermittent fault
5%
ECM connection or ground circuit issue
Diagnostic Steps
1
Step 1: Wiggle test the sensor connector and wiring while monitoring live data for signal dropouts
2
Step 2: Inspect connector terminals for corrosion, bent pins, or moisture intrusion
3
Step 3: Check wiring harness routing for contact with hot exhaust components or sharp edges
4
Step 4: Verify ground circuit continuity and resistance (should be less than 1 ohm)
5
Step 5: If intermittent fault cannot be isolated, replace sensor and repair any damaged wiring
Estimated Repair Cost
$120 - $500
Parts + labor, varies by vehicle and location
The Bank 1 Sensor 2 exhaust gas temperature sensor circuit is experiencing intermittent signal issues, causing sporadic readings or dropouts. This suggests a connection problem or failing sensor rather than consistent out-of-range readings.
The most common cause of P2085 (Exhaust Gas Temperature Sensor Circuit Intermittent Bank 1 Sensor 2) is: Intermittent wiring connection or damaged wire insulation
Typical repair costs for P2085 range from $120 to $500, depending on the vehicle, location, and whether you do it yourself or go to a shop.
Safe to drive but intermittent sensor failures may cause poor engine performance or limp mode activation. Address promptly to avoid emissions system damage.
Start by connecting an OBD2 scanner to read the code and any freeze frame data. Then follow the diagnostic steps specific to P2085 to identify the root cause.
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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.
