P2002 DPF efficiency below threshold bank 1

Caused by short distance driving

P2003 DPF efficiency below threshold

An air leak will result in sensor readings fluctuations that will trigger the codes.
Fuel with high percentage sulphur will contribute to these fault codes.

P0470 Exhaust pressure sensor malfunction

Blockage in pipe from sensor to the exhaust

P242f (if left untreated)

Faulty exhaust pressure sensor

P2031 exhaust gas temperature sensor circuit

Loose or corroded connectors or terminals
Broken wires
Faulty sensor

P2032 exhaust gas temperature sensor low

Loose or corroded connectors or terminals
Broken wires
Faulty sensor

P2033 exhaust gas temperature sensor high

Loose or corroded connectors or terminals
Broken wires
Faulty sensor

P242f DPF restriction (ash accumulation)

Excessive ash accumulation in DPF
Defective DPF pressure sensor
Clogged DPF pressure sensor pipes/hoses
Open or shorted circuit/s in the DPF sensor circuit
Inefficient DPF regeneration
Overuse of engine or fuel system additives
The active DPF regeneration system inoperative

P244a DPF differential pressure too low

Insufficient/incorrect diesel exhaust fluid
Open or shorted circuit – DPF pressure sensor
Defective pcm programming
Defective DPF sensor
Faulty DPF

P244b DPF differential pressure too high

Insufficient/incorrect diesel exhaust fluid
Open or shorted circuit – DPF pressure sensor
Defective pcm programming
Defective DPF sensor
Faulty DPF