Exhaust Gas Temperature Sensor Circuit Low Bank 2 Sensor 5
The P2486 code indicates that the exhaust gas temperature (EGT) sensor circuit for Bank 2, Sensor 5 is reporting a voltage lower than the expected range. This sensor monitors exhaust temperature to protect the diesel particulate filter (DPF) and other emissions components. A low circuit condition can be caused by a faulty sensor, wiring issues, or a short to ground. This may lead to incorrect temperature readings, potentially affecting DPF regeneration and emissions control.
01. Most Common Causes
- Faulty exhaust gas temperature sensor
- Short to ground in sensor wiring or connector
- Corroded or damaged sensor connector
- Open circuit in sensor signal wire
- Engine control module (ECM) issue (rare)
02. Symptoms You Will Notice
- Check Engine Light illuminated
- Reduced fuel economy
- Possible DPF regeneration issues
- Decreased engine performance
03. Step-by-Step Diagnosis
Step 1: Use an OBD2 scanner to confirm the code and check for related codes.
Step 2: Visually inspect the EGT sensor and wiring for damage, corrosion, or loose connections.
Step 3: Measure sensor resistance and compare to manufacturer specifications (typically 100-200k ohms at room temperature).
Step 4: Check for short to ground by disconnecting sensor and measuring voltage at the harness connector (should be ~5V reference).
Step 5: If sensor and wiring are okay, test the ECM output or replace the sensor.
04. Commonly Affected Makes
05. Frequently Asked Questions
Is it safe to drive with this code?▼
It is not recommended to drive long distances with this code, as it can lead to DPF clogging and reduced engine performance. Short trips may be okay, but prompt diagnosis is advised.
How much does it cost to fix?▼
The cost typically ranges from $50 to $150 for parts and labor, depending on the vehicle and shop rates. The sensor itself is often $30-$80.