DTC Troubleshooting: P0237
DTC P0237: Turbocharger Boost Sensor Circuit Low Voltage
NOTE: Before you troubleshoot, review the general troubleshooting information.

DTC Description
Confirmed DTC
Pending DTC
P0237 Turbocharger Boost Sensor Circuit Low Voltage
    

1.
Problem verification:

Problem verification
?1.
Turn the vehicle to the ON mode.

?2.
Check the parameter(s) below with the HDS.
Signal
Threshold
Current conditions
Values
Unit
Values
Unit
TC BOOST PRESSURE SENSOR
Less than 0.23
V
    

Do the current condition(s) match the threshold?

     
YES
     
     
     
The failure is duplicated. Go to step 2.
     
NO
     
     
     
Intermittent failure, the system is OK at this time. Check for poor connections or loose terminals at the turbocharger boost sensor and the PCM. If the on-board snapshot of this DTC is recorded, try to reproduce the failure under the same conditions with the on-board snapshot.?
2.
Determine possible failure area (P3 line, others):

Determine possible failure area (P3 line, others)
?1.
Turn the vehicle to the OFF (LOCK) mode.

?2.
Disconnect the following connector.
Turbocharger boost sensor 3P connector

?3.
Turn the vehicle to the ON mode.

?4.
Check the parameter(s) below with the HDS.
Signal
Threshold
Current conditions
Values
Unit
Values
Unit
TC BOOST PRESSURE SENSOR
Less than 0.23
V
    

Do the current condition(s) match the threshold?

     
YES
     
     
     
Go to step 5.
     
NO
     
     
     
Go to step 3.
3.
Determine possible failure area (turbocharger boost sensor, others):

Determine possible failure area (turbocharger boost sensor, others)
?1.
Measure the voltage between test points 1 and 2.
Test condition
Vehicle ON mode
 
Turbocharger boost sensor 3P connector: disconnected
Test point 1
Turbocharger boost sensor 3P connector No. 1
Test point 2
Turbocharger boost sensor 3P connector No. 3


Is there about 5.0 V?

     
YES
     
     
     
     
NO
     
     
     
Go to step 4.
4.
Open wire check (VCC2 line):

Open wire check (VCC2 line)
?1.
Turn the vehicle to the OFF (LOCK) mode.

?2.
Jump the SCS line with the HDS, and wait more than 1 minute.


?3.
Disconnect the following connector.
PCM connector E (80P)

?4.
Check for continuity between test points 1 and 2.
Test condition
Vehicle OFF (LOCK) mode
 
Turbocharger boost sensor 3P connector: disconnected
 
PCM connector E (80P): disconnected
Test point 1
Turbocharger boost sensor 3P connector No. 3
Test point 2
PCM connector E (80P) No. 77


Is there continuity?

     
YES
     
     
     
The VCC2 wire is OK. Check for any authorized service information related to the DTCs or symptoms you are troubleshooting, or substitute a known-good PCM, then recheck. If DTC P0237 goes away and the PCM was substituted, replace the original PCM.?
     
NO
     
     
     
Repair an open in the VCC2 wire between the PCM (E77) and the turbocharger boost sensor.?
5.
Shorted wire check (P3 line):

Shorted wire check (P3 line)
?1.
Turn the vehicle to the OFF (LOCK) mode.

?2.
Jump the SCS line with the HDS, and wait more than 1 minute.


?3.
Disconnect the following connector.
PCM connector E (80P)

?4.
Check for continuity between test points 1 and 2.
Test condition
Vehicle OFF (LOCK) mode
 
Turbocharger boost sensor 3P connector: disconnected
 
PCM connector E (80P): disconnected
Test point 1
Turbocharger boost sensor 3P connector No. 2
Test point 2
Body ground


Is there continuity?

     
YES
     
     
     
Repair a short in the P3 wire between the PCM (E57) and the turbocharger boost sensor.?
     
NO
     
     
     
The P3 wire is OK. Check for any authorized service information related to the DTCs or symptoms you are troubleshooting, or substitute a known-good PCM, then recheck. If DTC P0237 goes away and the PCM was substituted, replace the original PCM.?