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P2031 fault code: what it means

P2031: Exhaust gas temperature sensor 2 circuit fault. Affects DPF regeneration control.

Engine and gearbox (powertrain) · Minor

Usual causes, most likely first

  1. failed exhaust temp sensor
  2. heat-damaged wiring
  3. corroded plug

P2031 by make

Ford

Exhaust gas temperature sensor 2 circuit fault. Affects DPF regeneration control.

Usual causes: failed exhaust temp sensor; heat-damaged wiring; corroded plug

GWM

GWM diesel ute: exhaust temp sensor 2 circuit.

Usual causes: sensor; heat-damaged wiring

Holden

Exhaust gas temperature sensor 2 circuit.

Usual causes: failed sensor; heat-damaged wiring

LDV

LDV diesel: exhaust temp sensor 2 circuit.

Usual causes: sensor; heat-damaged wiring

Mercedes-Benz

Exhaust gas temperature sensor (bank 1 sensor 2) circuit fault.

Usual causes: failed exhaust temp sensor; wiring fault

Not sure what P2031 means on your car? Ask Credov.

Before you clear it

Write the code down or photograph the scanner first. A code that comes straight back after clearing points to a fault that is still there. A car whose codes were cleared just before you arrived may be hiding one: the scanner's readiness monitors show "not ready" for a while after codes are cleared.

Researched by Credov from manufacturer and workshop sources. A fault code points to where a fault may be; a workshop confirms it with a diagnosis. Browse all fault codes.