What Does P2486 Mean?
The PCM detected an abnormally low voltage signal from the exhaust gas temperature sensor at Bank 2, Sensor 5. The sensor voltage is below the expected operating range, indicating a short to ground or sensor internal fault.
Common Causes
35%
Wiring harness short to ground
30%
Failed EGT sensor with internal short
15%
Corroded connector causing voltage drop
12%
Moisture or water intrusion in sensor or connector
8%
PCM internal circuit failure
Diagnostic Steps
1
Step 1: Inspect wiring harness for chafing, rubbing against exhaust components, or damage causing short to ground
2
Step 2: Disconnect EGT sensor and measure voltage at PCM connector (should read reference voltage, typically 5V)
3
Step 3: Measure sensor resistance and compare to specifications; check for internal short to ground
4
Step 4: Perform insulation resistance test on wiring harness using megohmmeter if available
5
Step 5: Monitor live data with sensor connected and wiggle harness to identify intermittent shorts
Estimated Repair Cost
$150 - $700
Parts + labor, varies by vehicle and location
The PCM detected an abnormally low voltage signal from the exhaust gas temperature sensor at Bank 2, Sensor 5. The sensor voltage is below the expected operating range, indicating a short to ground or sensor internal fault.
The most common cause of P2486 (Exhaust Gas Temperature Sensor Circuit Low Bank 2 Sensor 5) is: Wiring harness short to ground
Typical repair costs for P2486 range from $150 to $700, depending on the vehicle, location, and whether you do it yourself or go to a shop.
Safe to drive short term but may cause improper DPF regeneration on diesel engines. Extended driving may result in catalytic converter or DPF damage from uncontrolled temperatures.
Start by connecting an OBD2 scanner to read the code and any freeze frame data. Then follow the diagnostic steps specific to P2486 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.
