Fit a cat, fit a sensor

NTK Lambda sensor from NGK

Published:  21 October, 2013

When you replace a catalytic convertor you should always fit a new NTK Lambda sensor too, says NGK Spark Plugs. The reason being, a worn or failed sensor will reduce control of the fuelling system and lead to increased fuel consumption, uneven running and poor performance. Spokesman Tim Howes says: "The impending Euro 6 emission limits are particularly tough for diesel engines and considerable R&D is going on to develop cost effective ways of meeting the targets." Howes continues: "Even now complex exhaust gas after treatment requiring strict and accurate monitoring is the norm. This usually necessitates multiple temperature, pressure and gas constituent sensor deployment. There has been a considerable increase in the use of NTK wide band oxygen sensors on later diesel passenger cars."

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  • High tech sensors 

    NTK sensors are used in many new models as they come off the factory production line, including the Volkswagen Golf VII. The 1.2 TSI model uses a binary Lambda sensor of the OZAS-S type which regulates the mixture, the 1.4 TSI uses a linear ZFAS-U type as a regulating sensor and the OZAS-S type acts as a diagnostic sensor. NTK temperature sensors in diesel engines work with close coupled exhaust systems, a CTAS-T sensor controls the exhaust temperature upstream of the turbo charger. NGK is also the sole supplier of NTK Lambda sensors for Fiat's TwinAir engine with Fiat, capable of detecting the air-fuel ratio over a broad range of operating points. The company advises garages to fit a new NTK Lambda sensor whenever the cat is replaced - a worn or failed sensor can result in increased fuel consumption, uneven running and poor performance.

  • Need a lift? 

    The Technique T1001 is a 3.5 tonne capacity lift built by Rotary Lift for its UK distributor Trade Garage Equipment and is available to Aftermarket readers over the next few weeks at a special rate, with a free set of height adaptors and a three-year warranty on parts and labour thrown in. The T1001 hydraulic, two-post lift has three stage front and rear supporting arms which automatically lock into position during lifting. The lifting columns are powered by high pressure hydraulic cylinders and a safety latch is integrated into both.

  • Probes, plates and beams 

    A range of MOT tools, ancillary items and spares for MOT lifts and emission gas analysers are available from Prosol. A range of turning plates includes the roller bearing type and stainless steel for most vehicle lifts. British made jacking beams are available with varying lifting capabilities and low profile options. The firm also provides gas analyser filters, oxygen and O2 sensors and probes for most manufacturers.

  • Brakes and batteries 

    Two bits of news from Euro Car Parts this month - firstly, Ferodo brake pads have joined its inventory, the preferred choice by Fiat, Ford, Renault and Volkswagen. Also, in its capacity of sole UK distributor of Lion Batteries, it has announced two further additions to its AGM range, which now includes five references for numerous vehicles. One covers the Toyota Prius and Lexus CT200H, the second fits many applications for Ford, Vauxhall, VW and some Japanese models.

  • Prevent blockages 

    A fuel additive has been developed by Liqui Moly to protect diesel particulate filters and is designed to be used before fuelling every 1,250 miles. The 250ml can treats 50 to 70 litres of fuel and is suitable for all vehicles fitted with a DPF unless they have an electronically additive tank system, as is the case with Citroen and Peugeot vehicles. "This additive is a practical new service for garages that can save their customers a great deal of expense," explains Liqui Moly spokesman Schönfelder. "And this will show competence to boot, which strengthens the relationship with the customer."


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