Delete EGR (Exhaust Gas Reheat/Recirculate) Valve function electronically by simply adding another resistor to the factory resistor - The Temperature Sensor on Air Flow Sensor is just a Resistor being cooled by the air flow. This simple process of cutting one wire & adding an extra Resistor tells the ECU that the EGR is functioning normally, cancelling Check Engine warning light.

Japanese car makes were facing their own Dieselgate scandal in March 2016, when the Japanese Govt tested their Diesel models & found they emitted many times higher than their claimed pollution levels. Toyota blamed the cold weather caused the vehicle emission controls (EGR) to switch off as quoted: Toyota “will continue to make improvements to reduce NOx emissions during on-road vehicle operation,” a company spokesman told the Wall Street Journal, with Nissan and Mitsubishi giving similar answers. It is believed cold weather may have affected the tests, with engines potentially switching off exhaust recirculation systems (EGR) as a protection measure. Diesel sales make up just 4% of the Japanese market.

This process of fitting an additional Resistor to the Temperature Sensor on the Air filter box (AAT) only switches off the EGR warning light & does not interfere with other engine functions. The engine mixtures are calculated by another Air Temperature Sensor (IAT) located near the Inlet Manifold. This Manifold Temperature Sensor reads the actual Air Temperature after it has been compressed by Turbo & Cooled by Intercooler.

Just let us know which vehicle you have then we can supply you the correct value Resistor & instructions on how to fit it for:

Audi 2.0L CRD (Please Supply Photo of Sensor)

BMW 6cyl 5 wire sensors

Citroen 4cyl hdi (4 & 6 wire sensors)

Citroen V6 hdi (2 Resistors are required to order)

Ford Focus, Kuga & Mondeo 2.0-2.2L

Ford Ranger 2.5-3.0L

Ford Ranger 2.2-3.2L (Up to 2017 models)

Ford Territory 2.7L

Ford Transit 2.0-2.4L

Holden Rodeo CRD/Colorado 3.0L

Holden Colorado 2.8L

Isuzu Dmax Mux 3.0L

Jaguar 4cyl & V6

Jeep 2.8L

Landrover Defender 2.2-2.4L

Landrover/Range Rover 2.7L

Landrover/Range Rover 3.0L V6 & 3.6L V8 (2 Resistors are required to order)

LDV 2.8L

Mazda 2.0-2.2L

Mazda BT50 2.5-3.0L

Mazda BT50 2.2-3.2L

Mitsubishi ASX & Outlander 2.0-2.4L

Mitsubishi Challenger & Triton 2.4L

Mitsubishi Challenger, Pajero & Triton 2.5-3.2L CRD

Nissan Pathfinder & Navara 2.3L

Nissan Pathfinder & Navara 2.5L CRD (Excl D22)

Nissan Pathfinder & Navara 3.0L 550 V6

Nissan Patrol 3.0L CRD

Peugeot 4cyl hdi (4 & 6 wire sensors)

Peugeot V6 hdi (2 Resistors are required to order)

TATA 2.2L

Toyota Hiace, Hilux & Prado 2.5-3.0L D4D

Toyota 4.5L V8 D4D

Volvo 5 wire Sensors

VW 1.9-2.0L (Please Supply Photo of Sensor)

Most EGR Blanking plates are being fitted in wrong position, they should be fitted at exhaust manifold, but this is hard to do & the overheated bolts are likely to break. Then the Blanking plate causes Check Engine fault light, so they drill a hole in Blanking Plate - But this then is not really a Blanking Plate any more - It Has A Hole In It! When hole carbons up with soot - Check Engine Light is On again. Blanking Plate needs to be removed & cleaned - over & over again!

No Blanking Plate Required & no EGR Fault Light with Resistor fitted.

With the Resistor fitted the EGR function is still part of the vehicles Systems Check. This also happens if you do an ECU reprogram to delete EGR (at a cost of up to $1200) – the vehicle still carries out a Systems Check, which makes sure the components work. Vehicles also do System Checks of Airbags & Anti-lock braking systems etc... it does not mean the vehicle has to activate the systems, just check they are not faulty.

The Resistor approach sounds complicated & overall it has taken years of development & testing to get to this point of just using a single resistor. We previously made full Emulators which were much more complicated & would not be possible to self-install.

If the vehicle still shows EGR fault light after installing Resistor then the EGR is more likely stuck open & will need to be checked/cleaned. This can be checked using a Scan Tool. Any 3.0L 4stroke engine, regardless of make, will try to draw in 1.5L of air for every revolution. At idle speed this will be shown on scan tool at around 19grams/per/second (a 2.0L engine will be around 12gr/sec). When EGR is open this figure will be halved, but only for a few seconds at a time. If your vehicle is always half its expected flow on scan tool then your EGR valve is stuck open & will need repair. If it is just the Vacuum Solenoid which is stuck then it can be just a simple matter of blocking the vacuum hose. If the EGR Valve is stuck open it can be cleaned. Once this is done the Resistor will take care of the rest.

Vehicles with twin MAF (Air Flow) Sensors also need to fit 2 Resistors.

Process can be reversed at any time by simply removing the resistor & re-soldering the 2 wires.