Parts for your 2022 Honda Civic-Knock sensor

2022 Honda Civic knock sensor — what it does and how to look after it

Yes, the 2022 Honda Civic uses a knock sensor. Honda’s Service Information (SIS) for the 11th‑gen Civic (FE/FL), the Honda Electronic Parts Catalogue, and third‑party technical databases such as ALLDATA and Autodata all list and illustrate a block‑mounted piezoelectric knock sensor on both the 2.0‑litre naturally aspirated and 1.5‑litre turbo engines. The factory documentation also details diagnostic trouble codes (e.g., P0325, P0327, P0328) and a specific tightening torque, confirming the sensor’s role in engine management.

On the 2022 Civic, the knock sensor listens for high‑frequency vibration that indicates detonation (pinging). It sends that signal to the engine control unit, which then trims ignition timing (and boost on the 1.5T) to keep the burn stable. That protects the engine from damage, helps it run smoothly on varying fuel qualities, and keeps performance and fuel economy consistent across Aussie and Kiwi driving conditions. Because it’s adaptive, it also allows the ECU to run closer to optimal timing when conditions are good, which is why a healthy knock sensor is central to both punch and efficiency.

It’s not a routine replacement item, but it does deserve a little attention during servicing. Techs typically give the area a quick look whenever the intake side is off: check the connector for corrosion, make sure the harness isn’t rubbing on the block, and confirm the sensor body is cleanly seated. If a check engine light pops up with P0325/27/28 or there’s pinging, flat acceleration, or rising fuel use, proper diagnosis comes first—rule out poor grounds, wiring faults, or old petrol before condemning the sensor.

If replacement is needed, stick with a quality OEM‑spec sensor. The mounting face on the block should be clean and dry—no sealant—and the sensor should be torqued precisely to the figure in Honda’s service info. Over‑ or under‑tightening can make it deaf or oversensitive. After refitting, clear any DTCs and perform the relevant idle/throttle learns so the ECU settles in. Under the bonnet, the sensor sits centrally on the block beneath the intake manifold (firewall side) on both engines, so access is usually from above with some intake plumbing and brackets moved, or from underneath on a hoist. Running the recommended fuel grade (91/95/98 RON as specified for the variant) also reduces unnecessary knock activity and keeps the ECU happy.

• Watch for: CEL with P0325/P0327/P0328, pinging under load, sluggish climb up hills, higher fuel use.
• Service tip: Inspect the plug and loom routing during major services, replace only if proven faulty.
• Fitting tip: Clean mating face, torque to spec, then complete ECU learn procedures.

Where is the knock sensor on a 2022 Honda Civic?

On both the 2.0‑litre and 1.5‑litre turbo engines it’s mounted to the engine block, roughly central, beneath the intake manifold on the firewall side. Access is usually from above with some intake bits moved, or from underneath on a hoist.

What are the symptoms of a bad knock sensor on a 2022 Civic?

Common signs include a check engine light with P0325, P0327 or P0328, flat or hesitant acceleration, worse fuel economy, and sometimes audible pinging under load. The ECU may pull timing to protect the engine, which feels like reduced performance.

Does the knock sensor need regular replacement?

No. There’s no scheduled interval. It’s replaced only if diagnosed faulty or physically damaged. During major services, a quick visual check of the connector and harness is worthwhile. When replacing, use an OEM‑quality sensor, torque it to spec, clear codes and perform idle/throttle learns.