Parts for your 2001 Daihatsu Yrv-Oxygen sensor

2001 Daihatsu YRV oxygen sensor (lambda sensor)

On the 2001 Daihatsu YRV (M200/M201 series) with the K3-VE 1.3 and K3-VET 1.3 turbo engines, an oxygen sensor is definitely fitted. Daihatsu service literature and dealer parts catalogues for these engines list a heated oxygen sensor (often called a lambda or A/F sensor) ahead of the catalytic converter, and many trims also have a second sensor after the cat for monitoring. That lines up with EOBD/OBD-II and Euro 3 era requirements around 2000–2001 that mandate closed‑loop fuel control and catalyst monitoring using oxygen sensors.

For this YRV, the oxygen sensor’s job is to keep the air–fuel mix spot on. It constantly reads the oxygen content in the exhaust and feeds that to the ECU, which then trims fuel delivery to maintain efficient, low‑emissions combustion. The upstream sensor is the workhorse for mixture control, if there’s a downstream sensor, it mainly checks the catalytic converter is doing its thing.

When an oxygen sensor gets tired, the YRV can use more petrol, feel a bit flat, or flash the check‑engine light. Common giveaways include rough idle, hesitation, blacker tailpipe soot, and fault codes like P0130–P0161. Because these sensors are wear items that live in heat, they can grow lazy over time even before they fail outright.

As part of routine servicing, it’s smart to inspect the sensor wiring and connector, check for exhaust leaks near the manifold and flex, and scan for fuel‑trim and O2 sensor codes. There’s no strict change interval, but many owners consider replacement somewhere around 150,000–200,000 kilometres, or earlier if fuel economy drops or codes return. On YRV variants with two sensors, replace the faulty one identified by diagnostics (Bank 1 Sensor 1 is the upstream, Bank 1 Sensor 2 is post‑cat).

When fitting a new sensor, go for a quality, direct‑fit unit with the correct connector to suit the YRV’s loom. Avoid silicone sealants that can contaminate the sensor, fix any vacuum or exhaust leaks first, and clear codes so the ECU can relearn trims. A light dab of the sensor maker’s specified anti‑seize (if not pre‑coated) and careful routing of the lead away from the exhaust will help the replacement last. Treat the oxygen sensor well and the little Daihatsu rewards with crisper throttle response, lower emissions, and fewer trips to the bowser.

• Symptoms to watch: rising fuel use, check‑engine light, rough idle, sulphury exhaust smell, failed emissions test.
• Good practice: scan live data, fix intake/exhaust leaks, use the correct sensor type (A/F vs conventional O2) for the specific YRV engine.

Popular questions about the 2001 Daihatsu YRV oxygen sensor

How many oxygen sensors does a 2001 Daihatsu YRV have?
Most YRV models have one upstream sensor before the catalytic converter. Many markets and the turbo K3‑VET variants also add a second, downstream sensor after the cat to monitor catalyst efficiency. A quick look underneath for a second bung behind the cat or a scan tool reading for Bank 1 Sensor 2 will confirm what’s fitted.

What are common fault codes for a YRV oxygen sensor?
Typical codes include P0130–P0135 (upstream circuit/heater), P0136–P0141 (downstream circuit/heater), and P0171/P0172 for lean/rich conditions influenced by a lazy sensor or intake/exhaust leaks. Always check wiring, grounds, and leaks before condemning the sensor.

When should the oxygen sensor be replaced?
There’s no fixed schedule, but many owners see best results replacing around 150,000–200,000 km, or sooner if there’s a check‑engine light, poor fuel economy, or failed emissions. If live data shows a slow, flat, or stuck sensor response, it’s time.