Parts for your 2008 Honda Stream-Maf sensor

2008 Honda Stream MAF sensor: what’s fitted and what’s not

For the 2008 Honda Stream (RN6–RN9), a mass air flow (MAF) sensor isn’t fitted from factory and isn’t relevant to normal servicing. Honda’s own technical documentation points to a speed‑density setup instead of a MAF‑based system. Refer to: Honda Stream RN6–RN9 Service Manual (Fuel & Emissions – PGM‑FI System Description), Honda Electronic Parts Catalogue for RN6/RN8 model codes, and Honda Technical Training on PGM‑FI Air/Fuel Control for R‑series engines. These sources show the Stream’s R18A (1.8L) and R20A (2.0L) engines use a manifold absolute pressure (MAP) sensor and intake air temperature (IAT) input to calculate airflow, not a MAF.

Why no MAF? Honda’s PGM‑FI on these R‑series engines calculates incoming air using manifold pressure, intake air temperature and engine speed. This speed‑density approach suits the Stream’s naturally aspirated intake design, keeps the plumbing simpler under the bonnet, reduces cost and packaging bulk, and avoids a delicate hot‑wire element in the intake where it can be fouled by dust or oil mist. The wiring diagrams and parts lists for RN6/RN8 show a MAP sensor on the intake manifold and an IAT sensor in the intake tract, but no mass airflow meter in the airbox or snorkel.

What owners should do instead of “MAF servicing” on a 2008 Stream: focus on the parts the ECU actually relies on. That means keeping the air filter fresh, the throttle body clean, and the PCV system breathing properly. Check the intake ducting for splits and clamps for leaks, and make sure the vacuum hoses to the manifold and purge system are tight. If drivability goes off (hunting idle, poor economy, a flat spot) and the MIL pops up with codes like P0107 or P0108, inspect the MAP sensor and its wiring. The MAP sensor can sometimes be gently cleaned with electronics‑safe cleaner, but if readings are out of spec per the service manual, replacement is the reliable fix. Because there’s no MAF on these models, generic advice or codes about “MAF circuit” won’t apply to a 2008 Stream.

• Engines: R18A (1.8L), R20A (2.0L)
• Air metering: MAP + IAT (no MAF)
• Key checks: air filter, intake leaks, throttle body cleanliness, MAP sensor health

Popular questions

Does the 2008 Honda Stream have a MAF sensor?
No. The 2008 Stream uses Honda’s PGM‑FI speed‑density strategy with a MAP sensor and intake air temperature input. There’s no MAF fitted from factory on RN6–RN9 models with R18A or R20A engines, as confirmed by Honda service manuals and the parts catalogue.

Where’s the MAP sensor on a 2008 Honda Stream?
It’s mounted on the intake manifold near the throttle body, with a small three‑pin connector and an O‑ring seal. If you’re tracing it, follow the wiring loom across the top of the manifold, the sensor sits where it can read manifold pressure directly.

What maintenance replaces “MAF cleaning” on a Stream?
Replace the air filter at sensible intervals (more often if driving dusty roads across Aus or NZ), check for intake and vacuum leaks, and clean the throttle body with suitable cleaner. If rough running or codes like P0107/P0108 appear, test the MAP sensor against the specifications in the service manual and replace if out of range.