Emissions

P2035 — Exhaust Gas Temperature Sensor 2 Circuit High (Bank 1)

Severity: medium Drive with care, to a shop

What P2035 means

The engine control module detected a voltage that is too high in the circuit of exhaust gas temperature (EGT) sensor 2 on bank 1. This usually points to an open circuit or a failed sensor. The sensor sits in the exhaust, typically near the catalyst or diesel particulate filter, and the ECM uses it to monitor temperatures and manage DPF regeneration.

Symptoms

  • Check engine light on
  • Regeneration does not start or is interrupted
  • Related DPF or emissions codes
  • Possible reduced power mode
  • Higher fuel use from regeneration attempts
  • DPF warning lamp on the dash

Possible causes

  1. Open circuit in the EGT sensor wiring
  2. Failed EGT sensor 2
  3. Broken wire near the exhaust flex section
  4. Corroded or damaged connector terminals
  5. Damaged or melted harness insulation near the exhaust
  6. Rarely, a faulty ECM

How to diagnose

  1. Scan all codes and review freeze frame data, noting other EGT and DPF codes
  2. Inspect the sensor harness and connector for breaks, melting, corrosion or past repairs
  3. Check the wires near the exhaust flex section, where vibration often breaks them
  4. Compare EGT 2 live data with other temperature readings on a cold engine
  5. Unplug the connector and measure sensor resistance against the manufacturer spec
  6. Test the wiring to the ECM for continuity, reference voltage and ground
  7. Check the sensor response against spec as it heats up
  8. Clear the code after repair and confirm it does not return

Common fixes

  • Replace the exhaust gas temperature sensor
  • Repair or replace the damaged wiring
  • Clean or replace the connector and terminals
  • Perform a forced DPF regeneration after the repair if required
  • Replace the ECM only after everything else is ruled out

Questions and answers

What does P2035 mean?

The ECM sees a too-high signal in the exhaust gas temperature sensor 2 circuit on bank 1. It is most often caused by a broken wire or a failed sensor.

Can I drive with P2035?

For a short time, yes, but don't put it off. Without the sensor data, DPF regeneration may not run and the filter can slowly clog.

How do I fix P2035?

Start by inspecting the sensor wiring and connector, especially near the exhaust flex joint. If the wiring is intact, test and replace the sensor if needed.

This is general information about the code. The meaning can differ between makes and models: a scan tool and the repair manual for your car will show the exact cause.