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Parts for your 2002 Nissan Bluebird-Throttle position sensors
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2002 Nissan Bluebird throttle position sensor (TPS): purpose, servicing and replacement
Based on technical documentation, the 2002 Nissan Bluebird is fitted with a throttle position sensor. The Nissan Factory Service Manual (Bluebird/Bluebird Sylphy G10, EC section, MY2000–2005), the Nissan FAST parts catalogue, and Hitachi/NTK component listings all show a TPS on QG-series engines (QG15DE, QG18DE). The FSM’s OBD-II diagnostics include TPS-related DTCs P0120–P0123, confirming the sensor’s presence. On cable-throttle variants it’s a bolt-on potentiometer with an idle switch, on drive-by-wire variants it’s integrated within the electronic throttle body. So, throttle-position-sensors are relevant on the 2002 Nissan Bluebird.
On this model, the TPS tells the engine control unit exactly how far the throttle plate is open. That info is used to fine-tune fuelling, spark timing and, on autos, shift behaviour. It also helps with cold starts, idle stability, decel fuel cut and quick throttle response. When the TPS goes out of whack, symptoms can include a hunting idle, flat spots on take-off, hesitant kickdown, higher fuel use, and a check engine light.
Servicing the throttle-position-sensor on a 2002 Bluebird is straightforward if it’s the cable type and a bit more involved if it’s the electronic-throttle type:
- Inspection: under the bonnet, check the TPS connector for corrosion or broken locking tabs, and the harness for chafing. Don’t drown the sensor in cleaner.
- Cleaning: clean the throttle bore and plate with throttle-body-safe cleaner. Avoid spraying directly into the TPS.
- Testing: with a multimeter, look for a smooth voltage sweep from roughly 0.4–0.7 V (closed) to about 4.0–4.5 V (wide open). Refer to the FSM specs for the exact engine code.
- Adjustment (cable-throttle): the TPS usually mounts on slotted holes. Rotate slightly to achieve the closed-throttle voltage/idle switch spec, then tighten the screws evenly.
- Replacement: use quality OE-style parts (e.g., Hitachi). For electronic-throttle versions, the TPS is integral to the throttle body, so the whole unit is replaced.
- Relearn: after replacement or cleaning, perform Throttle Valve Closed Position Learn and Idle Air Volume Learn with a scan tool or the pedal procedure, then clear codes and road test.
A well-set TPS keeps the Bluebird smooth, frugal and easy to live with over the kilometres. If in doubt, a quick scan for TPS codes and a voltage sweep test will usually tell the story.
Popular question: What are the common signs of a failing TPS on a 2002 Bluebird?
Drivers often notice a surging or unstable idle, flat acceleration, delayed or harsh shifts on auto models, increased fuel consumption, or the check engine light. Fault codes like P0120–P0123 are dead giveaways. If the throttle feels “dead” or jumpy, the TPS or its wiring is worth a look.
Popular question: Can the TPS be adjusted, or does it need replacing?
On cable-throttle QG engines, the TPS can typically be adjusted because it mounts on slotted holes. Set the closed-throttle voltage or idle-switch continuity per the FSM. If the sweep is noisy or has dead spots, replacement is the fix. On drive-by-wire versions, there’s no adjustment—the TPS is part of the throttle body.
Popular question: Do I need to perform a relearn after TPS or throttle work?
Yes. Perform Throttle Valve Closed Position Learn and Idle Air Volume Learn with a suitable scan tool or the specified pedal sequence. Do it with the engine at operating temperature and electrical loads off. Skipping this step can leave the idle high, low, or unstable.
