P2036 — Exhaust gas temperature sensor, bank 2 sensor 2 — electrical input high

P2036 means high electrical input on the exhaust-gas-temperature (EGT) sensor circuit for bank 2, sensor 2. A high input does not prove overheated exhaust; on some thermistor circuits an open connection may appear as an implausibly cold calculated temperature. Confirm sensor technology and mounting location using vehicle-specific documentation.

Affected system: Exhaust gas temperature sensing

Symptoms

• Engine/emissions/DPF warning according to vehicle strategy; the engine may otherwise run normally.
• Missing, fixed or implausible live EGT value for bank 2, sensor 2, where the scan tool exposes it.
• On applications using this channel for regeneration or thermal protection, power reduction, altered fuel use or inhibited regeneration is possible.

Possible causes

• Open/high-resistance connection at EGT bank 2, sensor 2, on circuit designs where it drives the monitored voltage high.
• Short to supply/reference or return-circuit fault, depending on the ECU wiring topology.
• Damaged EGT thermistor or incompatible resistance-versus-temperature characteristic.
• Heat-damaged loom insulation, terminal corrosion or faulty exhaust-work wiring repair.

What to check

• 1. Save related DTCs, freeze-frame and conditions when the fault set. Compare the electrical signal with the calculated temperature if both are available.
• 2. Identify bank 2, sensor 2 from the VIN-specific wiring/exhaust layout. Confirm a physical bank 2 exists; on a single-bank engine verify code translation with the OEM diagnostic tool.
• 3. With engine stopped and exhaust fully cold, inspect routing, connectors and supports for overheating, corrosion, melted insulation or exhaust contact.
• 4. From a cold start, observe live EGT bank 2, sensor 2 alongside other available channels. A fixed, missing or impossible value points to a signal/interpretation problem, not proven exhaust temperature; compare channels only under relevant comparable conditions.
• 5. Identify NTC, PTC or other sensor technology from service data. With the sensor disconnected, and only where approved, compare resistance at measured temperature with the OEM curve; no universal ohm figure applies.
• 6. Follow OEM signal, return and reference tests for an open or short-to-supply condition. An apparently very cold PID can accompany high circuit voltage on some NTC arrangements.
• 7. Repair only the demonstrated defect (connector/harness or VIN-correct sensor). Verify normal temperature progression as the exhaust warms and that the DTC monitor no longer fails.
• 8. Do not initiate a forced DPF regeneration merely to test the sensor. If overheating warnings, smoke, a strong burning smell or major power loss occur, stop safely and seek professional diagnosis; exhaust components remain burn hazards.

Also written as: P2036-00, P203600 (some scan tools add the fault-type byte, e.g. -00).