Failed exhaust gas temperature sensor that internally shorts its signal wire to ground; Chafed, pinched, or melted sensor wiring harness near the exhaust or turbocharger; Corroded or loose connector pins at the sensor or at the engine computer; Signal wire shorted to chassis ground along its routing; Water intrusion into the sensor connector causing a low-resistance path; Engine computer internal fault pulling the sensor signal low, though this is rare

DTC codes / P20xx · Fuel and air metering and auxiliary emission controls / P2035

P2035Exhaust Gas Temperature Sensor Circuit Low (Bank 2 Sensor 2)

P2035 means the engine computer has detected an abnormally low voltage signal on the exhaust gas temperature (EGT) sensor circuit for bank 2 sensor 2, which is the sensor positioned after the catalytic converter on the bank of cylinders that does not contain cylinder number one. The computer expects the sensor's signal voltage to fall within a specific range once the exhaust has warmed, and a sustained low reading tells it the circuit is grounded, the sensor has failed, or the wiring is damaged.

SystemPowertrain

Code typeGeneric (all makes)

SeverityMedium

Fix difficultyIntermediate

AreaFuel and air metering and auxiliary emission controls

Symptoms you may notice

Illumination of the check engine light, often with no other symptoms besides the warning light
Reduced engine power or limp mode if the computer substitutes a default exhaust temperature value
Poor fuel economy or altered regeneration behavior on diesel vehicles that rely on this sensor
Intermittent warning light that appears after the engine bay gets hot or wet
A stored freeze-frame showing the low voltage occurred during normal operating temperature

Common causes, most likely first

Failed exhaust gas temperature sensor that internally shorts its signal wire to ground
Chafed, pinched, or melted sensor wiring harness near the exhaust or turbocharger
Corroded or loose connector pins at the sensor or at the engine computer
Signal wire shorted to chassis ground along its routing
Water intrusion into the sensor connector causing a low-resistance path
Engine computer internal fault pulling the sensor signal low, though this is rare

How to diagnose and fix it

Read stored and pending codes with a scan tool and record the freeze-frame data for P2035
Inspect the bank 2 sensor 2 connector and wiring for corrosion, chafing, or heat damage
Measure sensor resistance and compare it to the manufacturer's specification for the current temperature
Back-probe the signal wire at the computer and check for a short to ground with the sensor disconnected
Repair or replace damaged wiring and connectors, then clear the code and verify the voltage returns to normal
Replace the exhaust gas temperature sensor if the circuit tests good but the signal remains low
Road-test the vehicle through a complete warm-up cycle to confirm the code does not return

What a low EGT signal really tells you

A low signal voltage does not automatically condemn the sensor, because a shorted harness or a corroded connector will produce the exact same reading on the scan tool.
Bank 2 sensor 2 is often the post-catalyst sensor on V6 and V8 engines, so technicians who assume it is a pre-turbo sensor waste time looking in the wrong place.
On diesel engines this sensor feeds the regeneration strategy, and a false low reading can trigger excessive regeneration attempts that dilute the engine oil.
A sensor that tests correctly when cold can still fail when hot, so resistance checks should be repeated after the exhaust reaches operating temperature.
Replacing the sensor without checking the connector for water intrusion commonly leads to the same code returning within a few hundred miles.

Can I keep driving with P2035?

The vehicle usually remains drivable with P2035, but prolonged driving with a faulty exhaust temperature signal can cause poor regeneration behavior on diesel engines and increased emissions. Avoid heavy towing or sustained high-load driving until the circuit is diagnosed and repaired.

Tools that help

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Guidance is general and written for all OBD-II vehicles. Exact tests and values vary by model, so confirm the fault before replacing parts.