FuelPartsDB · WORKSHOP TECHNICAL SERVICE

DOC REF: SOP-CR-INJ-01

WORKSHOP INSTALLATION JOB SHEET & SOP

DENSO 23209-21020DENSO 23209-21020 Multi-Hole Fuel Injector Toyota Prius Yaris Vios Corolla 1.5L 1NZ-FXE 1NZ-FE FJ430 · Euro 56

Technician / Installer:

Date / Odometer:

Vehicle Reg / VIN:

Quality Sign-off:

CRITICAL INSTALLATION SPECIFICATIONS & TORQUES

Torques (Hold-down):21 N·m

Torques (Tightening):21 N·m

Copper washer:Renew the sealing washer on every installation. 1.50 mm standard; step up to 1.70 mm after light seat reaming, 2.00 mm after heavy seat refinishing.

IMA / ECU coding:Not required for this assembly

MANDATORY INSTALLATION CHECKLIST

[ ]Bore cleaned to bare metal using nylon/brass reaming brush & vacuumed (zero debris / no steel wire)
[ ]New copper sealing washer fitted with correct thickness (do not reuse old washer)
[ ]High-temperature ceramic paste applied to injector body shaft (never coat the nozzle tip)
[ ]Hold-down clamp bolt tightened in stage torque/angle sequence as specified
[ ]Fuel rail high-pressure line union torqued without tension or cross-threading
[ ]IMA / QR calibration code entered into diagnostic tool (Lexia/KTS/VCDS) for cylinder balancing
[ ]Low-pressure air bleed performed, engine idling leak-off test verified leak-free

DENSO

23209-21020

View Specs

SolenoidDenso Multi-Point Port Fuel Injection (MPI, 3 bar)Euro 56

DENSO 23209-21020 Multi-Hole Fuel Injector Toyota Prius Yaris Vios Corolla 1.5L 1NZ-FXE 1NZ-FE FJ430

Reference data for Bosch 23209-21020 common rail injector · OEM 23250-21020, FJ430, 842-12260 · Application Toyota 1.5L 4-Cylinder DOHC 16V VVT-i Hybrid (1NZ-FXE / 1NZ-FE)

Engine Platform:Toyota 1.5L 4-Cylinder DOHC 16V VVT-i Hybrid (1NZ-FXE / 1NZ-FE) →

OE REFERENCE23250-21020, FJ430, 842-12260

CONTROL VALVE-

NOZZLE-

RAIL PRESSURE3 bar

EMISSIONEuro 5 / Euro 6

WARRANTY12 Months

Compatible Injectors

OEM Ref

Vehicle & Engine Fitment

Vehicle	Engine	Years
Toyota Prius Gen 2 & Prius C / Aqua (NHW20 / NHP10)	1.5L DOHC 16V VVT-i Atkinson Hybrid (1NZ-FXE)	2001-2019
Toyota Yaris / Echo / Vios / Corolla Axio (NCP10 / NCP90 / NCP150)	1.5L DOHC 16V VVT-i (1NZ-FE)	2000-2018

Technical Specifications

Specification	Value
sku	23209-21020
brand	DENSO
manufacturer_code	23209-21020
pressure_rating	3.0 bar (43.5 psi)
torque_flange	21 N-m (15 lb-ft)
torque_line	21 N-m (15 lb-ft)
engine_family	Toyota 1.5L 4-Cylinder DOHC 16V VVT-i Hybrid (1NZ-FXE / 1NZ-FE)
Operating PressureCore Spec

Diagnostic Trouble Codes & Fault Protocols

Common diagnostic trouble codes (DTCs) triggered when this common rail injector experiences wear, circuit faults, or calibration drift:

P0087Critical

Fuel Rail / System Pressure Too Low

Excessive internal backleak from worn control valve seats drops common rail pressure below target under engine load.

P0087 Guide →🧪 Backleak Calculator

P0201 - P0208High

Injector Circuit Malfunction / Open Circuit

Solenoid coil resistance drift (0.2-0.5 Ω) or piezo stack degradation triggers driver stage shutdown on affected cylinders.

P0201 Circuit Guide →

P0300 / P0301+High

Cylinder Misfire & Balancing Deviation

Carbon-clogged nozzle spray holes or missing IMA calibration causes uneven cylinder contribution. Recode ECM and verify washer seating.

P0300 Misfire Protocol →💻 IMA Coding Tool 📐 Washer Thickness

P0088High

Fuel Rail / System Pressure Too High

Spill line backpressure or stuck metering valve prevents rail depressurization, creating overpressure risks under load.

P0088 Guide →📊 Rail Pressure Converter

Browse all 61 Diesel Diagnostic Trouble Codes in our Workshop Hub ->

WORKSHOP PROTOCOLS

Technical Diagnostic & Service Protocols

Authoritative field procedures, diagnostic testing thresholds, and service SOPs for this assembly.

Workshop Diagnostic Protocol

Common Rail Injector Back-Leak Testing Guide

Common rail injector backleak test protocol. Graduated cylinder setup, warm idle & cranking limits in mL/min, control valve wear & P0087 diagnosis.

Read Technical Protocol

COMMON RAIL DIESEL WORKSHOP SOP

Stuck Injector Removal & Carbon Cleaning SOP | FuelPartsDB

Comprehensive workshop SOP for stuck diesel injector removal, pneumatic vibro-puller extraction, carbon solvent softening, and seat reaming without damage.

Read Technical Protocol

ASSEMBLY & INSTALLATION PROTOCOL

Diesel Injector Torque Specs & TTY Angles Guide

Common rail diesel injector hold-down bolt torque specs, TTY angles & pipe unions. Covers Bosch, Detroit DD13, Cummins & VAG 2.0 TDI workshop data in Nm.

Read Technical Protocol