Parts for your 2018 Honda Civic-Crank angle sensor

2018 Honda Civic crank-angle sensor (CKP): purpose, care, and replacement tips

Technical references confirm the 2018 Honda Civic is fitted with a crank-angle sensor, more commonly called the crankshaft position (CKP) sensor. Honda’s Service Information for the 10th‑gen Civic (Engine/PGM‑FI section covering CKP sensor testing and replacement), mainstream workshop manuals for 2016–2020 Civics, and Honda OBD‑II diagnostics (fault codes P0335–P0339) all document this sensor and its role. So it’s absolutely relevant to the 2018 Civic.

On this model, the CKP sensor tracks the crankshaft’s exact position and speed, feeding the ECU the timing data it needs for spark and fuel. Without it, the engine won’t start or will run poorly. It’s a solid‑state magnetic sensor reading a toothed wheel on the crank, that live “crank angle” signal lets the ECU time ignition, synchronise with the cam sensor, and protect the engine under all loads and revs.

It isn’t a scheduled replacement item, but it deserves a quick look during routine servicing. Being low on the engine, its connector and wiring can cop road grime and moisture. A quick visual check under the bonnet (and from underneath with the splash shield off) to make sure the harness isn’t chafed, oil‑soaked, or loose can save headaches later. If the engine light’s on with P0335–P0339, or there are no‑start issues, misfires, random stalling, or the tacho drops to zero while cranking, the CKP is high on the suspect list.

When replacement is needed, the job is straightforward for a competent DIYer with axle stands and a scan tool, but many owners will prefer a trusted workshop. Typical steps include:

• Disconnect the battery and remove the lower splash shield for access.
• Unplug the CKP connector, remove the retaining bolt, and withdraw the sensor carefully.
• Lightly oil a new O‑ring, install the new sensor square to its bore, and tighten the bolt to spec (refer to Honda service data).
• Reconnect, clear any stored codes, and perform idle/CKP relearn if required by the ECU.

Handy tips: avoid striking the sensor tip, keep the mating face clean, and route the loom exactly as per factory to prevent rub‑through. Use quality parts—cheap sensors can cause intermittent faults that are a pain to diagnose. With sensible checks every 10,000–15,000 km services and prompt attention to warning lights, the 2018 Civic’s CKP will usually go the distance.

Popular questions about 2018 Honda Civic crank-angle sensors

Where is the crank-angle (CKP) sensor on a 2018 Civic?
On most 2018 Civic engines it’s mounted low on the engine block near the crankshaft. Access is usually from underneath after removing the lower splash shield. Exact position varies a little between the 2.0L and 1.5L turbo, but it’s always reading a reluctor on the crank.

What are common signs the CKP sensor is failing?
No‑start or hard starting, intermittent stalling, rough idle, sudden loss of power, the tacho dropping to zero while cranking, and the check‑engine light with codes like P0335–P0339 are the usual tells. Wiring damage or oil intrusion at the connector can mimic a failed sensor.

Does the CKP sensor need regular servicing?
There’s no scheduled replacement, but it’s smart to inspect the connector and loom during routine services. Keep it clean and dry, fix any oil leaks that might wick into the plug, and replace the O‑ring if the sensor is removed. Replace the sensor only if it’s faulty or contaminated.