Parts for your 2008 Honda Stream-Camshaft sensor

2008 Honda Stream Camshaft Sensor — What It Does and When to Replace It

Based on Honda’s technical literature for the second‑generation Stream (RN6–RN9, 2007–2011) and the Honda Electronic Parts Catalogue, the 2008 Honda Stream’s R‑series petrol engines (R18A 1.8 and R20A 2.0) are fitted with a camshaft position sensor (CMP). The Service Manual’s PGM‑FI diagnostics also reference CMP‑related DTCs (such as P0340/P0341), confirming the sensor’s role in engine control.

The camshaft sensor tells the Engine Control Module exactly where the intake camshaft is in its rotation. That timing info lets the ECU run true sequential fuel injection, sync ignition on each cylinder, control the Variable Valve Timing and Lift (i‑VTEC/VTC) system, and speed up starts. If the CMP signal drops out, the Stream may crank longer, run in a reduced‑performance mode, stumble at idle, or log a fault light.

There’s no scheduled service interval for the CMP on a 2008 Honda Stream — it’s a solid‑state part designed to last the life of the vehicle. Still, a few practical habits help:

• Keep an eye out for oil seepage at the rocker cover, oil contamination at the CMP connector can skew the signal.
• If the MIL shows and codes like P0340/P0341 appear, check the wiring and connector condition before assuming the sensor is toast.
• Use quality replacement parts that meet OEM specs, cheap sensors can cause intermittent sync issues that are hard to chase.

When replacement is needed, access is at the cylinder head near the cam gear. Disconnect the battery, unplug the connector, remove the retaining bolt, and gently twist the sensor free so the O‑ring isn’t nicked. Lightly oil the new O‑ring, seat the sensor squarely, and tighten the bolt to factory spec. After replacement, clear codes and perform an idle learn so the ECU settles into stable fuelling and timing. A quick visual of the cam trigger wheel and a wiring continuity check is smart if issues persist, because cam/crank correlation is a team effort on these R‑series engines.

Common warning signs owners report include hard starting when hot, a brief surge or stumble, poorer fuel economy, and an engine light. Left unfixed, the ECU may protect the engine by dialling back performance, which isn’t ideal for daily commuting across Aussie or Kiwi kilometres.

Where is the camshaft sensor on a 2008 Honda Stream?

On R18A and R20A engines it sits on the cylinder head near the timing cover, reading a target on the cam. It’s accessible under the bonnet without removing the engine. Expect a single retaining bolt and a sealed plug‑in connector.

Can the Stream be driven with a faulty camshaft sensor?

It may still run, but starting can be slower and power reduced as the ECU falls back to less precise fuelling and ignition strategies. It’s best to address it promptly to avoid poor drivability and extra fuel use.

What fault codes point to a camshaft sensor issue?

Typical codes include P0340 (Camshaft Position Circuit) and P0341 (Camshaft Position Range/Performance). Always verify wiring, connector condition, and cam/crank correlation before replacing the sensor.