Exhaust Gas Temperature Sensor Circuit High Bank 2 Sensor 2
Diagnostic trouble code P2036 indicates that the powertrain control module (PCM) has detected an abnormally high voltage signal from the exhaust gas temperature (EGT) sensor located at Bank 2, Sensor 2. This high circuit voltage typically points to an open circuit, a disconnected sensor, or a short to power within the sensor's wiring harness.
While the vehicle will usually remain drivable, this code can prevent proper exhaust aftertreatment operation, such as DPF regeneration in diesel engines. It should be diagnosed soon to prevent potential clogging or damage to emissions components.
Common symptoms
- Illuminated Check Engine Light
- Decreased fuel efficiency
- Incomplete or disabled diesel particulate filter (DPF) regeneration
- Reduced engine power or limp mode (vehicle dependent)
- Failure to pass an emissions inspection
Likely causes
- Faulty exhaust gas temperature (EGT) sensor (Bank 2, Sensor 2)
- Open circuit or broken wiring in the EGT sensor harness
- Loose, damaged, or corroded electrical connector
- Short to voltage in the EGT sensor signal wire
- Aftermarket exhaust modifications causing sensor damage
- Faulty Powertrain Control Module (PCM) (rare)
What to check before replacing parts
Visually inspect the EGT sensor, wiring, and connector for Bank 2 Sensor 2.
Look for: Look for melted wires, broken connections, severe corrosion, or physical damage from road debris and exhaust heat.
Monitor the EGT sensor data using a diagnostic scan tool.
Look for: Check if the temperature reading is stuck at an impossibly low or high value (often defaulting to a maximum extreme) that does not change as the exhaust heats up.
Disconnect the EGT sensor and measure the reference voltage at the harness connector.
Look for: With the key on, engine off, you should typically see a 5-volt reference signal. If voltage is missing or matches battery voltage, there is a wiring issue back to the PCM.
Measure the internal resistance of the EGT sensor using a multimeter.
Look for: Compare the resistance reading (in ohms) to the manufacturer's specifications for the current ambient temperature. An infinite resistance reading (OL) confirms the sensor has an internal open circuit and must be replaced.
Perform a continuity and short-to-voltage test on the signal wire between the sensor connector and the PCM.
Look for: Look for infinite resistance (open circuit) or continuity to power. If the wire is broken or shorted to another power source, the harness will need repair.
This page explains the generic P2036 definition and is general reference information, not a diagnosis for your specific vehicle. Actual causes, severity, and repairs vary by make, model, engine, and mileage — always confirm with a scan tool and a qualified technician before replacing parts.
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