Parts for your 2009 Honda Stream-Crank angle sensor

2009 Honda Stream crank-angle-sensor: what it does and how to look after it

Based on Honda technical literature, the 2009 Honda Stream (RN6–RN9, R18A 1.8L and R20A 2.0L) is fitted with a crank-angle-sensor, more commonly called the Crankshaft Position (CKP) sensor. This is documented in the Honda Stream RN6–RN9 Workshop Manual under the PGM‑FI system section for the CKP sensor, and supported by the Honda Electronic Parts Catalogue listings for the 2009 Stream showing a “Sensor Assy., Crank” (typical part numbers include 37500‑RNA‑305 and 37500‑R40‑A01, engine-dependent). The same CKP architecture is also covered in Honda service manuals for the R18A/R20A engines used across Civic and CR‑V models of the era.

On the 2009 Honda Stream, the crank-angle-sensor keeps the engine management on point. It reads a toothed wheel on the crankshaft and feeds precise rotation and position data to the ECU. That data lets the car fire the injectors and spark bang-on time, manage idle smoothly, and protect the engine under load. If it goes out of whack, expect hard starts, random stalling, sluggish performance, or the MIL popping up with codes like P0335–P0339.

There’s no set replacement interval for the CKP, it’s a “inspect if symptomatic” item. During regular servicing, it’s smart to:

• Scan for fault codes and check live data for clean RPM signals.
• Inspect the sensor connector and loom near the front of the engine for oil ingress, heat damage, or rubbed-through wiring.
• Check for metal debris build-up on the sensor tip if applicable, and ensure the crank pulley/reluctor area is clean.

Replacement is straightforward for a trained tech: disconnect the battery, remove any splash guards or belts as required for access, unplug the connector, remove the retaining bolt, and swap the unit with a quality OEM-spec sensor. Always seat the new sensor fully and route the harness away from moving bits. Final torque should follow the Honda Stream service manual spec for the specific engine. After replacement, clear codes, confirm immediate start-up, and verify stable RPM and timing with a scan tool.

To stretch the sensor’s life in local Aussie and Kiwi conditions, keep up with oil changes (less vapour and grime around the front cover), fix any coolant or oil weeps near the sensor quickly, and avoid soaking the area with aggressive degreasers. When the timing chain, crank seal, or front-end accessories are being serviced, that’s the perfect time to give the CKP wiring and connector a careful once-over.

Popular questions about 2009 Honda Stream crank-angle-sensor

Where is the crank-angle-sensor on a 2009 Stream?

On R18A and R20A engines, the sensor is mounted low at the front of the engine near the crank pulley/oil pump area. Access is typically from underneath with the splash shield off. Exact position and removal steps are outlined in the Honda Stream RN6–RN9 Workshop Manual.

What are the warning signs the sensor is failing?

Common tells include long crank/no start, engine cutting out when warm, rough idle, erratic tacho behaviour, and a check engine light with codes like P0335. If the wiring has heat damage or the connector’s oily or green with corrosion, the signal can drop out and mimic a bad sensor.

Can it be cleaned or should it just be replaced?

If the tip has light debris and the sensor tests fine electrically, a clean and secure refit can sort minor issues. But if resistance or signal testing is out of spec, or there’s internal failure, replacement with an OEM-quality unit is the go. Always confirm with a scan tool after the job.