Operation CHARM: Car repair manuals for everyone.
Home >> Volvo >> 2003 >> V40 L4-1.9L Turbo VIN 27 B4204T4 >> Repair and Diagnosis >> Powertrain Management >> Computers and Control Systems >> Knock Sensor >> Service and Repair >> Removal and Replacement
Manuals through 2025 now available!

Our trusted friends have launched a new website named LEMON, which has newer manuals. It also contains all the CHARM manuals.

LEMON is the spiritual successor to CHARM, I recommend you try it!

Link: lemon-manuals.la or lemon-manuals.org.ua

(Some people have issue connecting. LEMON is investigating. For now, use Firefox or change your DNS server)

Or, hide this message: temporarily or permanently

Removal and Replacement






Replacing the knock sensor (KS)

Preparations





Remove
- The relay cover.
- The trim cover.
- The connector from the bracket. Open the two clamps. Pull out the cable from the protective tube.
- The battery negative lead.
- The front engine cover.
- The starter motor, see Engine replacement, transferring components Engine Replacement, Transferring Components.

Replacing the knock sensor (KS)





Remove
- The screw.
- The knock sensor (KS) from underneath. Remove the assembly with its wiring.

Install:
- The knock sensor (KS) from underneath. Tighten the nut to 20 Nm.

Note! Install the knock sensor (KS) as illustrated.

Installing components





Install:
- The starter motor, see Engine replacement, transferring components Engine Replacement, Transferring Components.
- Route the cable via the protective tube. Install the clamps.
- The connector on the bracket.
- The cover over the connector.
- The engine cover.
- The front engine cover.
- The battery negative lead.
Start the engine. Read off any diagnostic trouble codes (DTCs).

pro multis · About Operation CHARM