Parts for your 2007 Honda Odyssey-Oxygen sensor

2007 Honda Odyssey Oxygen Sensor — Purpose, Service and Tips

Based on technical references including Honda’s 2007 Odyssey Factory Service Manual, the Honda electronic parts catalogue, and OBD‑II/ADR emissions requirements (SAE J1979 and ADR 79-series), the 2007 Honda Odyssey is fitted with oxygen/air–fuel sensors. Both the V6 J35 petrol models (common in North America) and the 2.4‑litre K24 petrol models (common in Australia and New Zealand) use upstream air–fuel ratio (wideband) sensors for fuel control and downstream oxygen sensors for catalyst monitoring.

The oxygen sensor’s job is to help the engine computer keep the air–fuel mixture right on the money. Upstream “A/F” sensors read the exhaust before the catalytic converter, allowing tight closed‑loop control for smooth running, better economy, and lower emissions. Downstream sensors sit after the cat to check the converter’s efficiency and keep an eye on catalyst health. On the 3.5L V6 there are typically four sensors (two upstream, two downstream across the two banks). On the 2.4L four‑cylinder there are generally two (one upstream, one downstream).

When these sensors age or get contaminated, the Odyssey can chew more fuel, feel a bit lazy, or throw a check‑engine light. Common clues include rough idle, blackened tailpipe, a whiff of sulphur, and fault codes like P013x/P015x (sensor circuits), P0171/P0174 (system too lean), or even a P0420 (catalyst efficiency) that may be sensor‑related.

They’re not a routine “replace every service” item, but they do wear. Many owners find upstream sensors start to drift around the 160,000–200,000 km mark, especially with lots of short trips. As part of a scheduled service, it’s smart to inspect wiring and connectors, check for exhaust leaks, and review live data (fuel trims and sensor response) with a scan tool. If replacement’s due, use OEM‑quality parts (Denso or NGK/NTK are common OE suppliers), avoid generic splice‑ins, and follow the manufacturer’s torque spec. Most new sensors arrive pre‑coated, don’t add extra anti‑seize unless the maker specifies it.

After fitting, clear codes and perform an ECU relearn or drive cycle. Watch short‑ and long‑term fuel trims settle, confirm the upstream sensor responds quickly to throttle blips, and ensure the downstream sensor shows stable post‑cat readings. Done right, the Odyssey will run cleaner, pull better, and sip less fuel.

• Tip: Fix any vacuum or exhaust leaks first—new sensors can’t compensate for false air.
• Tip: Route the harness away from hot manifolds and moving parts under the bonnet.

Popular questions about 2007 Honda Odyssey oxygen sensors

How many oxygen sensors does a 2007 Honda Odyssey have?

The 3.5L V6 typically has four sensors—two upstream A/F sensors (one per bank) and two downstream O2 sensors. The 2.4L four‑cylinder usually has two—one upstream A/F sensor and one downstream O2 sensor. Always confirm by VIN or checking the Honda parts catalogue.

What are common signs or fault codes of a failing sensor?

Expect increased fuel use, hesitations, or a check‑engine light. Typical codes include P0131–P0135/P0151–P0155 (sensor circuits or heater faults), P0171/P0174 (lean), and sometimes P0420 for catalyst efficiency. A scan tool showing slow sensor response or abnormal fuel trims seals the diagnosis.

Should both sensors be replaced at the same time?

Not always. Replace the failed unit first, confirm trims and response are healthy, and check for leaks. That said, if the vehicle has high kilometres and the paired sensor is original, many techs proactively replace the mate on the same bank/age to avoid a second visit.