Operation CHARM: Car repair manuals for everyone.
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)

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Knock Sensor: Locations




Powertrain Component Views

Front of Engine Components (LZ4)




1 - Mass Air Flow (MAF)/Intake Air Temperature (IAT) Sensor
2 - Evaporative Emission (EVAP) Canister Purge Solenoid Valve
3 - Throttle Body
4 - Fuse Block - Underhood
5 - Engine Control Module (ECM)
6 - Transmission Control Module (TCM)
7 - X100
8 - Heated Oxygen Sensor (HO2S) - Bank 2 Sensor 1
9 - Starter Motor
10 - Engine Oil Pressure (EOP) Sensor
11 - Heated Oxygen Sensor (HO2S) - Bank 2 Sensor 2
12 - Knock Sensor (KS) 2

Lower Left Front of Engine Components (LZ4)




1 - Engine Oil Pressure (EOP) Sensor
2 - Starter Motor
3 - Starter Solenoid
4 - Knock Sensor (KS) 2

Rear of Engine Components (LZ4)




1 - Manifold Absolute Pressure (MAP) Sensor
2 - Ignition Control Module (ICM)
3 - Heated Oxygen Sensor (HO2S) - Bank 1 Sensor 1
4 - Knock Sensor (KS)1
5 - Engine Coolant Temperature (ECT) Sensor
6 - Crankshaft Position (CKP) Sensor
7 - Vehicle Speed Sensor (VSS) (MN5/M15)
8 - Engine Oil Level Sensor
9 - Heated Oxygen Sensor (HO2S) - Bank 1 Sensor 2
10 - Park / Neutral Position (PNP) Switch (MN5)