Parts for your 2008 Honda Civic-Crank angle sensor

2008 Honda Civic crank-angle sensor: fitted, vital and worth a look at service time

Based on Honda technical literature, the 2008 Honda Civic is fitted with a crank-angle sensor, commonly listed by Honda as the Crankshaft Position (CKP) sensor. It’s used across the 8th‑gen Civic range (1.8L R‑series, 2.0L K‑series Si/Type S and Hybrid) for engine timing and monitoring.

• Honda Civic 2006–2011 Service Manual (Engine Electrical, PGM‑FI System Description and CKP Sensor sections): CKP sensor supplies crank speed and position to the ECM for ignition and fuel timing.
• Honda OBD‑II DTC listings for 2006–2011 Civic: CKP‑related fault codes P0335–P0339 indicate crank sensor circuit/performance issues.
• Honda parts catalogues for 2006–2011 Civic: CKP sensor assemblies (e.g., 37500‑RNA‑A01 for R18 applications) confirm fitment.

For this model, the crank-angle sensor’s job is straightforward but crucial. It reads a toothed wheel on the crankshaft and tells the engine computer exactly where the crank is and how fast it’s spinning. The ECM then times spark and fuel injection, manages idle stability, and cross‑checks with the cam sensor for accurate valve timing. If the sensor signal goes wonky, the Civic can be hard to start, stumble, lose power, or even stall. The check engine light may pop on with CKP codes, and the tacho might drop out unexpectedly.

It’s not a routine replacement item, but it deserves attention during servicing. A quick visual under the bonnet for oil leaks around the timing cover and a check of the sensor connector and loom for chafe or corrosion goes a long way. On most 1.8L Civics, the CKP sits low at the front near the crank pulley, on the 2.0L K‑series it’s typically at the rear of the block by the bellhousing. Keeping the area clean and dry helps protect the sensor and its O‑ring.

When replacement is needed, go for a quality OEM‑equivalent sensor. Disconnect the battery, support the car safely, remove the splash shield for access, and swap the sensor, fitting a fresh O‑ring lightly lubricated with clean engine oil. Tighten the retaining bolt to the factory spec from the service manual, clip the harness back properly, clear any codes, and take a short drive so the ECM can settle its trims. No special calibration is usually required, but a scan tool check of live RPM and misfire counters is a smart final step. Done right, the Civic should return to smooth, drama‑free running for many more kilometres.

Where is the crank-angle sensor on a 2008 Honda Civic?

On most 1.8L R‑series models it’s mounted low at the front of the engine near the crank pulley behind the lower splash shield. On 2.0L K‑series (Si/Type S), it’s typically at the back of the engine block near the transmission bellhousing. Hybrids also use a CKP sensor, with access varying due to the hybrid drivetrain layout.

What are common symptoms or fault codes when it fails?

Hard starting, intermittent stalling, rough idle, poor fuel economy and a dead tacho are common signs. The check engine light may log CKP codes such as P0335–P0339. Because these symptoms can mimic other faults, a scan tool and a wiring inspection help confirm the cause.

Does the crank-angle sensor need regular replacement?

No. It’s a “replace on condition” part. During routine servicing, check for oil contamination, damaged wiring, and loose connectors. Replace the sensor if it’s faulty, contaminated or out of spec, and always fit a new O‑ring to keep leaks at bay.