-20- DTC P Code _ DST-1 display Code explanation Reference 91 P2002 DPF system malfunction The DPF system is abnormal. There could be welding damage or clogging. Perform a DPF system check. 98 P2032 Exhaust temperature sensor 2 malfunction (LO) Cannot detect the temperature normally. There could be a sensor malfunction or a har- ness ground short. 98 P2033 Exhaust temperature sensor 2 malfunction (HI) Cannot detect the temperature normally. There could be a sensor malfunction, harness open circuit or +B short. 22 P2120 Malfunction of both accelerator sensors Both accelerator sensor systems are malfunc- tioning. There could be a sensor abnormality or harness abnormality.
22 P2121 Accelerator sensor 1 malfunction Cannot detect accelerator sensor 1 normally. Check the sensor voltage. 22 P2122 Accelerator sensor 1 malfunction (LO) Cannot detect accelerator sensor 1 normally. Check the sensor voltage. There could be an open circuit or ground short. 22 P2123 Accelerator sensor 1 malfunction (HI) Cannot detect accelerator sensor 1 normally. Check the sensor voltage. There could be a +B short. 22 P2126 Accelerator sensor 2 malfunction Cannot detect accelerator sensor 2 normally. Check the sensor voltage. 22 P2127 Accelerator sensor 2 malfunction (LO) Cannot detect accelerator sensor 2 normally. Check the sensor voltage.
There could be an open circuit or ground short. 22 P2128 Accelerator sensor 2 malfunction (HI) Cannot detect accelerator sensor 2 normally. Check the sensor voltage. There could be a +B short. 15 P2228 Atmospheric pressure sensor malfunction (LO) The atmospheric pressure sensor (inside the ECU) is abnormal. If it occurs frequently, the ECU must be repaired or replaced. 15 P2229 Atmospheric pressure sensor malfunction (HI) The atmospheric pressure sensor (inside the ECU) is abnormal. If it occurs frequently, the ECU must be repaired or replaced. 72 P2633 Supply pump solenoid valve 2 malfunction Supply pump solenoid valve 2 has abnormal voltage. There could be an open circuit or ground short.
PCV2 for large vehi- cles 72 P2634 Supply pump solenoid valve 2 malfunction Supply pump solenoid valve 2 has abnormal voltage. There could be a +B short. PCV2 for large vehi- cles 9 U0101 Communication obstruction (transmission) Communication with the transmission ECU is obstructed. Abnormal communi- cation with AT-ECU