- Safety first (read and follow)
- Wear safety glasses and nitrile or mechanic’s gloves.
- Work on a cool engine and in a well-ventilated area (throttle-body cleaner fumes).
- Disconnect the negative battery terminal before unplugging sensors or removing the throttle body to avoid shorting and accidental cranking.
- Keep rags and a small container for screws/bolts; avoid leaving tools in the engine bay.

- What “throttle body” work covers (quick)
- Clean: remove carbon build-up on the throttle plate and bore so idle and throttle response improve.
- Inspect: confirm sensors, connectors and vacuum hoses are good.
- Replace: needed when the throttle body electronics/BISS sensor or the throttle valve is faulty, or when severe corrosion/mechanical damage exists.

- Common causes needing replacement
- Persistent rough idle, throttle hesitation, CEL (check engine light) codes for throttle position or motor, or mechanical binding.
- Electrical faults (motor or TPS) usually require replacing the whole throttle body assembly on modern Toyota Hilux models.

- Tools you likely already have (basic tools) — with how to use each
- Socket set (metric, 8–14 mm most common)
- Use with a ratchet to remove bolts holding the air intake hose and throttle body. Fit correct-size socket squarely on the bolt and pull the ratchet handle smoothly to avoid rounding bolts.
- Ratchet and extensions
- Extension helps reach recessed bolts; operate by steady force, not sudden jerks.
- Combination screwdrivers (flat and Phillips)
- Use to loosen hose clamps, electrical connector tabs, and small screws. Match the screwdriver tip size to the screw to avoid stripping.
- Pliers (slip-joint or needle-nose)
- Use to remove spring clamps or pull vacuum hoses gently; protect rubber hoses with a rag when pulling to avoid tearing.
- Torque wrench (recommended)
- Ensures throttle-body bolts are tightened to correct spec—prevents warping or stripping. Set to manufacturer spec when re-installing bolts.
- Shop rags or lint-free towels
- For wiping carbon and catching cleaner runoff.
- Throttle-body cleaner (aerosol formulated for throttle bodies/intake)
- Spray onto carbon deposits; designed to evaporate without harming sensors. Do not use harsh carburetor cleaners not rated for electronics.
- Soft-bristle brush or toothbrush
- Use to gently scrub carbon off the throttle plate and bore; do not gouge soft aluminum surfaces.
- Safety gloves and glasses
- Protect skin/eyes from chemical exposure and debris.
- Small container or magnetic tray
- Keep bolts and clamps organized.
- New throttle-body gasket (if you remove the throttle body)
- Replace the gasket whenever the throttle body is removed to ensure a good air seal.
- OBD-II scanner (optional but highly recommended)
- Read/clear codes; perform electronic throttle relearn when required. Use to verify no faults remain.
- Multimeter (optional)
- Test electrical continuity and sensor voltages if diagnosing throttle position sensor or motor problems.
- Penetrating oil (optional)
- For stuck bolts—apply and wait before attempting removal.
- Small vacuum pump (optional)
- Useful to test vacuum hoses and PCV lines for leaks.

- Extra/pro tool reasons (why you may need them)
- Torque wrench: prevents over-torquing aluminum throttle-body bolts which can crack.
- OBD-II scanner: forces throttle relearn, reads codes so you know if cleaning fixed the issue or if replacement is needed.
- Multimeter: confirms whether the TPS or motor is getting power/ground—helps decide replacement vs. cleaning.
- Penetrating oil: prevents rounded/stuck bolts and reduces risk of breaking bolts in the intake.

- Parts you may need (with short reasons)
- Throttle-body gasket — always replace when removing throttle body to prevent intake leaks.
- Replacement throttle body assembly — if throttle motor, internal electronics or TPS fail or if bore/shaft is damaged.
- Idle Air Control (IAC) valve — older Hilux engines may have a separate IAC; if faulty, replace it.
- Vacuum hoses / intake boots — brittle or cracked hoses cause leaks and should be replaced.
- Air filter — replace if dirty; cleaner air reduces throttle-body contamination.
- O-rings / clamps — if damaged while removing.

- Step-by-step procedure (cleaning and basic replacement) — follow in order
- Prepare
- Park on level ground, engage parking brake, remove key.
- Let engine cool, then disconnect negative battery terminal.
- Gather tools, cleaner, new gasket, rags and container for fasteners.
- Access throttle body
- Remove air intake hose and airbox cover using screwdriver or socket as needed.
- Label or note vacuum hoses and electrical connector positions; gently unplug electrical connectors by depressing tabs—do not yank wires.
- Remove any vacuum lines/clips attached to the throttle body (use pliers/twist gently).
- Remove throttle body (only if you must remove it)
- Unbolt throttle-body mounting bolts with the socket and ratchet; use an extension if needed.
- Support the throttle body as you remove the last bolt; lift it away and place on a clean towel.
- Remove old gasket and clean mating surfaces on manifold with a rag—no aggressive scraping.
- Clean throttle body (if re-using)
- Spray throttle-body cleaner onto throttle plate and bore.
- Hold throttle plate open manually (gently, do not force linkage) to reach both sides.
- Use a soft brush to remove carbon; wipe with clean rags until shiny and opening moves freely.
- For electronic throttle bodies: avoid soaking the throttle position sensor connector or wiring—spray sparingly and wipe.
- Allow cleaner to evaporate/dry for a few minutes.
- Inspect and test
- Check wiring connectors for corrosion; check vacuum hoses for cracks by visual inspection and by squeezing.
- If you have a multimeter, verify TPS wiring voltages against factory spec (if available) or look up typical behavior: wafer-like voltage change with throttle rotation. If uncertain, plan for replacement.
- Reinstall
- Fit a new gasket on the throttle body flange.
- Re-seat throttle body, hand-start bolts, then tighten in a cross pattern to even pressure. Use a torque wrench to manufacturer spec if available; if not, snug evenly—do not over-tighten.
- Reattach vacuum lines, electrical connectors, and air intake hose/clamps.
- Reconnect battery and relearn
- Reconnect the negative battery terminal.
- If you have an OBD-II scanner, clear any existing throttle codes and perform the throttle relearn as per scanner prompts or Toyota procedure.
- General relearn (if no scanner): turn ignition ON (engine off) and leave for about 10–20 seconds, then start engine. Allow the engine to idle without accessories for 3–5 minutes until idle stabilizes. Drive gently for a few kilometers to let ECU adapt.
- Final checks
- Inspect for air leaks, listen for unusual idle, and re-scan for codes.
- If rough idle or CEL returns, note codes and consider replacement throttle body or further electrical diagnosis.

- How to know when replacement is required (diagnosis hints)
- Check engine light with codes P0120–P0124, P0220–P0222, P2100–P2106, P2135 often point to TPS/throttle motor issues.
- If cleaning does not restore smooth idle or throttle response, or if the throttle plate does not move smoothly by hand, replace.
- If multimeter or scanner shows no response from throttle motor or inconsistent TPS voltage, replacement is needed.
- Physical damage, seized plate, heavy corrosion, or internal electrical faults = replace.

- What replacement looks like and cost notes
- Replacement is typically the complete throttle-body assembly on modern Hilux models (electronic unit). It includes sensors and motor. Gasket included or sold separately.
- Costs vary by year and supplier; used units cheaper but risk internal faults—OEM recommended for reliability.

- Practical beginner tips (short)
- Work slowly, keep parts organized, and don’t force connectors or bolts.
- Use the correct socket size; rounded bolts need more work to extract.
- If you’re unsure about electrical diagnosis or the CEL persists after cleaning, use a local parts store’s OBD reader or a mechanic—replacing an expensive throttle body without confirming the fault can be wasteful.

- Summary (one-line)
- Clean the throttle body first (safe, low-cost), replace the throttle-body assembly and gasket if cleaning and diagnostics show electrical or mechanical faults, and use a torque wrench and OBD-II scanner for best results.


rteeqp73

TOYOTA HILUX 2KD ENGINE LOW POWER /PROBLEM SOLVED itsaboutcarproblem #enginelowpower#themechanictvchannel.

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