DTC P0452 EVAP System (CPC) Pressure Sensor/Switch Circuit Low Design Changes to Fuel Tank Assembly & Vent Tubes – 2019-2021 Subaru Crosstrek PHEV

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NHTSA ID Number: 10249599

Manufacturer Communication Number: 09-82-23

Summary

This bulletin announces design changes made to the fuel tank and vent tubes.

 


NUMBER: 09-82-23
DATE:
10/02/23
REVISED: 01/08/24

APPLICABILITY: 2019-21MY Crosstrek PHEV
SUBJECT: DTC P0452 EVAP System (CPC) Pressure Sensor/Switch Circuit Low Design Changes to Fuel Tank Assembly & Vent Tubes

 

INTRODUCTION:

This bulletin announces design changes made to the fuel tank and vent tubes. An enhanced material has been incorporated into the production of these components. If DTC P0452 is stored in the engine control module (ECM), the information in this bulletin MUST be used to ensure an accurate diagnosis. Fuel types with high alcohol (ethanol) content may react with the fuel tank resin and cause clogging within the fuel tank components. The new fuel tank and vent tubes use a material with increased resistance to alcohol.

 

PRODUCTION CHANGE INFORMATION:

The production change information for Crosstrek PHEV is TBD.

 

PART INFORMATION:

IMPORTANT NOTE: No design changes were made to the Circulate Tube or the Electronic Vent Solenoid.

Part Description Part Number
TANK COMPLETE-FUEL 42012FL061
TUBE-AIR VENT 42074FL791
TUBE-AIR VENT 42074FL801
TUBE ASSEMBLY 42074FL730
VALVE-VENT 42084FL380eBay

REMINDER: Always order the most up-to-date replacement parts based on the specific VIN being repaired.

 

SERVICE PROCEDURE / INFORMATION:

REMINDER:  Customer satisfaction and retention starts with performing quality repairs.

NOTE: Refer to the applicable Service Manual and review: General Description > Repair Contents > Action required before & after Battery Disconnect. Additionally, record any stored seat position(s) before proceeding. Relearn any seat position memory after work is complete. If the power rear gate (PRG) height has been customized, that position must also be noted and relearned.

 

STEP 1) Perform a fault scan and confirm DTC P0452 is stored in the ECM.

 

STEP 2) Check the data monitor. Is the value of the Fuel Tank Pressure Sensor -2.65kPa (-19.88 mmHg, -0.78inHg) or less?

No

With DTC P0452 detected, the circuit has returned to a normal condition at  this time. Reproduce the fault and repeat diagnosis.

Yes

Check the Tank Pressure Sensor power supply for short to ground (see wiring diagram provided below).

Connector & Terminal (AD93) No. 3 (+) – Chassis Ground (-):

Is the voltage 4.5 Volts or more?

No

Repair the harness and/or the connector.

Yes

Proceed to the next Step.

 

STEP 3) Check the harness between the ECM and the Fuel Tank Pressure Sensor for short to              ground.

Connector & Terminal (B134) No. 59 (+) – Chassis Ground (-):

Is the resistance 1 MΩ or more?

No

Repair the short to ground within the harness between the ECM and the Fuel Tank Pressure Sensor.

Yes

Proceed to the next Step.

 

STEP 4) Check for poor contacts. Is there a poor contact found within the Fuel Tank Pressure Sensor Connector?

No

Replace the Circulate Tube Assembly. Refer to the applicable Service Manual: ENGINE > FUEL INECTION (FUEL SYSTEMS)(H4DO)(HEV)) > Circulate Tube Assembly.

Yes

Proceed to the next Step.

 

STEP 5) Check the Fuel Tank Pressure Sensor Signal.

Connector & Terminal (AD94) No. 2 (+) – Chassis Ground (-):

Is the voltage 2.2V or more?

No

Replace the Circulate Tube Assembly.

Yes

Proceed to the next Step.

 

STEP 6) Perform Electronic Vent Solenoid inspection.

Refer to the applicable Service Manual: Engine > EMISSION CONTROL (AUX. EMISSION CONTROL DEVICES)(H4DO(HEV)) > Electric Vent Solenoid Valve Assembly > Inspection.

Is the resistance between terminal 1 & 2 approximately 34Ω and all the connections secure?

No

Replace the Electronic Vent Solenoid:

Refer to the applicable Service Manual: Engine > EMISSION CONTROL (AUX. EMISSION CONTROL DEVICES)(H4DO(HEV)) > Electric Vent Solenoid Valve Assembly.

Visually inspect the internal condition of the Evaporative Line connections to the Electronic Vent Solenoid:

  1. Resin Tube on the Fuel Tank Assembly (attached directly to the Vent Solenoid)
  2. Vent Tube #1
  3. Vent Tube #2

If any deposits/build-up is found inside the tube(s), replace all the Vent Tubes and Fuel Tank Assembly.

Yes

Proceed to the next Step.

 

STEP 7) Inspect the evaporative system lines, hoses, and tubes for any deformation, cracks, or any     other physical damage. Replace any affected items as necessary.

IMPORTANT NOTE: Whenever reconnecting the ground cable terminal to the battery sensor, torque to 7.5Nm (5.5ft.-lbs. or 66inch-lbs.) while supporting the sensor with the other hand as outlined in the applicable Service Manual under: STARTING/CHARGING SYSTSEMS > Battery Sensor.

 

Wiring Diagram:

Refer to the Information In PDF below…

 


3 Affected Products

Vehicle

MAKE MODEL YEAR
SUBARU CROSSTREK 2019-2021

 


1 Associated Document

Manufacturer Communications

NUMBER: 09-82-23
DATE: 10/02/23
REVISED: 01/08/24

https://www.nhtsa.gov/recalls?nhtsaId=10249599

MC-10249599-0001.pdf 641.487KB

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