Diagnostic Trouble Codes (DTCs) –
Boost Trail

1127

10

P101F

Boost air pressure sensor abnormal rate of change 

Difference between previous and current boost pressure data is greater than maximum expected value for certain number of detections

Voltage updates at normal rate after power cycle

4

Boost air pressure sensor voltage too low

Boost air pressure sensor voltage drops below lower limit

Voltage returns to normal range

0

Boost air pressure sensor over pressure - most severed

Filtered boost pressure exceeds upper limit for specified duration of time

ECU reset or power cycle

3

Boost air pressure sensor voltage too high

Boost air pressure sensor voltage exceeds upper limit

Voltage returns to normal range

16

Boost air pressure sensor over pressure - moderately severe

Filtered boost pressure exceeds upper limit for specified duration of time

Return to normal range

17

Boost air pressure sensor under pressure - least severe

Boost air pressure sensor voltage falls below lower limit for specified duration of time

Voltage returns to normal range

1188

4

P1020

Wastegate actuator position sensor voltage too low

Wastegate actuator position sensor voltage falls below lower limit for specified duration of time

Voltage returns to normal range

10

Wastegate actuator position sensor abnormal rate of change

Difference between previous and current wastegate actuator position sensor voltage exceeds maximum detected value for specified number of detections 

Voltage updates at normal rate after power cycle

3

Wastegate actuator position sensor voltage too high

Wastegate actuator position sensor voltage exceeds limit for specified duration of time

Voltage returns to normal range

523949

31

P1021

Boost actuator learn failure

ECU issues error information if the learn procedure fails

Contact your Dealer

7

Boost actuator learn check failure

After specified duration of time after moving to open or closed, ECU detects wastegate position voltage and a fault is issued if the open or closed position is too far out of range

Contact your Dealer

523952

10

P1022

Boost air temperature sensor abnormal rate of change

Difference between previous and current boost air temp data is greater than upper limit for specified number of detections

Normal voltage rate of change after power cycle

4

Boost air temperature sensor voltage too low

 Boost air temperature sensor voltage  is below lower limit for specified duration of time

Voltage returns to normal or power cycle

16

Boost air temperature over temperature - moderately severe

Boost air temperature is above limit for specified duration of time

Return to normal temperature range

3

Boost air temperature sensor voltage too high

Boost air temperature sensor voltage is greater than upper limit for specified duration of time

Voltage returns to normal or power cycle

0

Boost air temperature over temperature - most severe

Over temperature - moderately severe condition is detected more than maximum amount of detections

ECU reset or power cycle

523953

3

P1023

Wastegate Actuator H Bridge (+/-) short to battery

If injector voltage and engine DC voltage exceed respective limits, ECU communicates with internal driver IC and issues error

Conditions to issue error no longer met

4

Wastegate Actuator H Bridge (+/-) short to ground

If injector voltage and engine DC voltage exceed respective limits, ECU communicates with internal driver IC and issues error

Conditions to issue error no longer met

523954

19

P1024

Wastegate Actuator H Bridge Internal IC no communication

 If injector voltage and engine DC voltage exceed respective limits, ECU communicates with internal driver IC and issues error

Conditions to issue error no longer met

523948

9

P1025

Boost actuator position not achieved

Boost actuator target position is not within expected range after specified duration of time

Target position is achieved

521373

3

P1386

Auxiliary injector MAG driver circuit shorted to B+

Smart IC driver detects short to B+

 ECU detects normal status of injector for specified amount of time

4

P1387

AUX Mag Injector Voltage Low

AUX injector voltage below lower limit

Voltage within normal range after power cycle

5

P1388

Auxiliary injector MAG driver circuit open/grounded

Smart IC driver sends open/ground error

ECU detects normal status of injector for specified amount of time

521374

3

P1389

 Auxiliary injector PTO driver circuit shorted to B+

Smart IC driver detects short to B+

ECU detects normal status of injector for specified amount of time

4

P1390

AUX PTO Injector Voltage Low

AUX injector voltage below lower limit

Voltage within normal range after power cycle

5

P1391

Auxiliary injector PTO driver circuit open/grounded

Smart IC driver sends open/ground error

 ECU detects normal status of injector for specified amount of time