Parts for your 2012 Honda Stream-Camshaft sensor

2012 Honda Stream camshaft sensor — what it does and when to replace it

Relevant and fitted: Technical sources confirm the 2012 Honda Stream uses a camshaft sensor (CMP). The Honda Stream RN6–RN9 service manual (PGM-FI/engine controls section) lists a CMP sensor feeding the PCM/ECU for sequential injection and VTC/VTEC phasing. The Honda Electronic Parts Catalogue for RN6–RN9 (R18A 1.8L and R20A 2.0L engines) also shows a camshaft sensor mounted to the cylinder head. Honda literature for the related R18A/R20A engines used in Civic and CR‑V models mirrors this configuration.

On this model, the camshaft sensor reads the exact position of the camshaft so the ECU can sync fuel injection and ignition, manage i‑VTEC/VTC cam timing, improve cold starts, and monitor for misfire. If it goes out of whack, the Stream may be hard to start, feel gutless, or throw a check engine light.

Typical symptoms owners notice include:

• Hard starting, uneven idle, or a stall at take‑off
• Lazy throttle response and poor fuel economy
• Check engine light with codes such as P0340/P0341 (and occasionally related VTC timing codes)

There’s no routine “service” for the camshaft-sensor itself, as it’s a sealed solid‑state unit. As part of regular servicing, a tech will usually check the connector and loom for oil ingress, brittle insulation, or a loose retaining bolt. Keeping up with oil changes is smart here — dirty oil can upset VTC operation and trigger sensor‑related timing faults.

Replacement is straightforward for most workshops and competent DIYers. The sensor sits on the cylinder head near the timing chain end — on the R18A it’s at the front upper area, on the R20A it’s near the intake cam. Usual steps: disconnect the battery, unplug the connector, remove the retaining bolt, swap the sensor (lightly oil the new O‑ring), refit, and torque to factory spec. Clear codes and road‑test while watching live data to ensure cam/crank sync looks sweet. Allow around 15–30 minutes once access is gained.

Tips to extend sensor and wiring life:

• Fix any rocker cover leaks that wick oil into the connector
• Avoid blasting connectors with a pressure washer, use contact cleaner instead
• Use quality parts — genuine or OE‑equivalent sensors tend to give the most reliable signal

If the Stream is showing the above symptoms, a quick scan and basic checks under the bonnet usually pinpoint whether the camshaft sensor or its wiring is to blame.

Popular questions about 2012 Honda Stream camshaft-sensor

Where is the camshaft sensor on a 2012 Honda Stream?
It’s bolted to the cylinder head at the timing chain end. On the R18A 1.8L it’s up front on the head, on the R20A 2.0L it’s near the intake camshaft area. Look for a small two‑wire/three‑wire plug leading to a compact sensor with a single retaining bolt.

Can a 2012 Stream run with a bad camshaft sensor?
Sometimes it will crank longer, run roughly, or drop into a limp mode using the crank sensor as a fallback. Expect poor performance, higher fuel use, and a check engine light. In some cases it may not start at all. Best to diagnose and replace the faulty sensor or repair the wiring promptly.

What fault codes point to a camshaft sensor issue?
Common Honda codes are P0340 (camshaft position circuit) and P0341 (camshaft position range/performance). You might also see related VTC or cam timing correlation codes if the issue affects phasing. Always check live data and wiring before condemning the sensor.