Parts for your 2001 Nissan Navara-Oxygen sensor

2001 Nissan Navara oxygen sensor: what’s fitted and what to service

Technical references including the Nissan D22 Factory Service Manual (2000–2004), EF&,EC sections for KA24DE and VG33E petrol engines, list Heated Oxygen Sensors (front and rear) as part of the emission control system. The companion Diesel Engine manuals for TD27, QD32 and ZD30DDT show no lambda (oxygen) sensor in their engine control diagrams. This aligns with Autodata listings and NGK/NTK and Bosch catalogues: petrol D22 Navaras use oxygen sensors, 2001 diesel D22 Navaras do not.

For diesel owners: the 2001 Navara diesels run lean-burn without a three-way catalytic converter or DPF, so an oxygen sensor isn’t used for closed-loop fuelling. The ECU bases fuelling primarily on MAF/MAP, boost, intake temperature and engine speed. That’s why you won’t find an O2 sensor on TD27, QD32 or ZD30DDT Navaras of this era.

For petrol owners (KA24DE 2.4 or VG33E 3.3), the oxygen sensor is a key bit of gear for smooth running and good fuel economy. The upstream sensor sits in the exhaust manifold and constantly samples the oxygen content so the ECU can trim fuelling on the fly. A downstream sensor, fitted after the catalytic converter, keeps an eye on converter efficiency. Together they help the Navara start clean when cold, cruise efficiently, and keep emissions in check.

When they get tired, you’ll often cop worse fuel economy, a lazier throttle, a rough idle, or the check engine light. Common codes include P0130–P0141 (Bank 1, Sensor 1/2 circuit or heater issues) and, on V6 models, P0150–P0161 for Bank 2. Don’t ignore exhaust leaks either — a leak before the sensor can trick it into reading lean.

Service-wise, oxygen sensors aren’t really a “clean and keep” item. In Aussie and Kiwi conditions, many techs recommend replacing original sensors around 160,000 km or earlier if symptoms or codes appear. Go for quality OE-spec units (NGK/NTK, Denso, Bosch) and match the connector — universal splice-ins are a hassle on utes that work for a living. Use a proper O2 sensor socket, soak the threads with penetrant on a cold exhaust, and refit with a small dab of nickel anti-seize on the new sensor’s threads (avoid the tip). Typical tightening is in the 30–40 N·m range, but check the Nissan manual for your exact engine.

After replacement, clear codes and do a decent drive cycle so the ECU relearns trims. If the light returns, chase upstream causes like vacuum leaks or a dirty MAF before blaming the new sensor.

• Symptoms to watch: poor economy, sulphury exhaust smell, rough idle, failed WOF/rego emissions test, and O2-related fault codes.
• Good practice: check wiring and connectors, ensure there are no exhaust leaks, and keep the air filter and MAF clean.

FAQs

How many oxygen sensors does a 2001 Navara have?
KA24DE petrol models typically run one upstream and one downstream sensor. VG33E V6 models may have a sensor per bank upstream and may also have downstream monitoring depending on market spec. Best bet is to check the build plate and the exhaust layout under the ute or refer to the D22 service manual for your exact variant.

What are common oxygen sensor fault codes on a 2001 Navara petrol?
You’ll usually see P0130–P0135 and P0140–P0141 for Bank 1 (upstream/downstream circuit or heater). On V6 models, Bank 2 equivalents are P0150–P0155 and P0160–P0161. If these pop up, verify there are no exhaust leaks, check the sensor connector and heater circuit, and confirm the MAF is clean before replacing parts.

Do 2001 diesel Navaras have an oxygen sensor?
No. TD27, QD32 and ZD30DDT diesels of this year don’t use an O2 sensor. Their fuelling strategy is based on airflow, boost and timing sensors, not closed-loop lambda control. If a scan tool mentions an O2 sensor on a diesel, double-check the engine selection or look for issues with other exhaust sensors (such as EGT) or wiring.