This procedure covers removal and replacement of the boost pressure sensor on the 1.5L turbocharged engine, which monitors intake manifold pressure for engine management.

Warnings

Tools required

Parts

• Boost pressure sensor × 1 — 37830-5AA-A01 or equivalent
• O-ring seal (if not included with sensor) × 1 — Use OEM specification

Preparation

1. Ensure engine is completely cool to the touch
2. Open hood and secure in open position
3. Locate the boost pressure sensor on the intake manifold near the throttle body
4. If desired, disconnect negative battery terminal to prevent codes (wait 3 minutes before proceeding)

Procedure

1. 1

   Access the boost pressure sensor
   The boost pressure sensor is located on the intake manifold between the turbocharger and throttle body. Remove any engine cover if equipped by pulling upward on the cover to release the grommets. Set cover aside.
2. 2

   Disconnect electrical connector
   Locate the electrical connector on the boost pressure sensor. Press the locking tab and pull the connector straight off the sensor. Inspect the connector terminals for corrosion or damage.
3. 3

   Remove the boost pressure sensor
   Using a 10mm socket, carefully loosen and remove the boost sensor mounting bolt. Gently twist and pull the sensor straight out from the intake manifold. Avoid tilting or levering against the manifold.
4. 4

   Inspect mounting location
   Examine the sensor port on the intake manifold for any debris, oil residue, or damage. Clean the mounting surface with a clean shop towel. Check that the O-ring groove is free of old seal material.
5. 5

   Prepare new sensor
   Remove the new boost pressure sensor from packaging. Verify the new O-ring is properly seated in the sensor groove. If installing a separate O-ring, lightly lubricate it with clean engine oil before installation.
6. 6

   Install new boost pressure sensor
   Carefully insert the new sensor straight into the intake manifold port, ensuring the O-ring does not roll or pinch. Align the mounting hole and thread the mounting bolt by hand first to ensure proper threading.
   Torque spec

   Boost Sensor15 Nm (11 lb-ft)
7. 7

   Torque sensor mounting bolt
   Using a torque wrench, tighten the boost sensor mounting bolt to 15.0 Nm (11.0 lb-ft). Do not exceed this specification as overtightening can crack the plastic sensor body or manifold boss.
   Torque spec

   Boost Sensor15 Nm (11 lb-ft)
8. 8

   Reconnect electrical connector
   Push the electrical connector firmly onto the sensor until you hear and feel a positive click. Gently tug on the connector to verify it is fully locked. Ensure the connector seal is properly seated.
9. 9

   Reinstall engine cover
   If an engine cover was removed, align the cover grommets with the mounting posts and press down firmly until all grommets are fully seated.

Reassembly

1. Reconnect negative battery terminal if disconnected, and tighten securely
2. Ensure all tools and materials are removed from engine bay
3. Close hood after final inspection

Verification

• Start the engine and allow it to idle for 30 seconds, listening for any unusual hissing or vacuum leaks around the sensor
• Check that the check engine light does not illuminate or flashes
• If a scan tool is available, verify the boost pressure sensor is reading approximately atmospheric pressure at idle (14.7 psi or 101 kPa)
• Perform a brief test drive and monitor for proper engine performance with no hesitation or boost-related codes
• Re-scan for diagnostic trouble codes after test drive to confirm repair success

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