LAMBDA DELETE - Catalyst Solution
LAMBDA DELETE - Catalyst Solution
When installing a decat pipe or high-performance downpipe, the engine control unit (ECU) detects a reduction in catalytic converter efficiency, triggering an engine management light (EML) and storing a P0420 or P0430 fault code. These codes indicate that the vehicle’s second lambda (O2) sensor is detecting an inefficiency in the exhaust system, which can cause issues such as:
– Persistent warning lights on the dashboard
– Poor throttle response due to incorrect ECU adjustments
– Engine running in limp mode, limiting performance
– Potentially failing emissions checks
At Onyx Performance, we offer specialist ECU recalibration to disable the secondary lambda sensor’s function, allowing your vehicle to run optimally with a decat or sports downpipe. Our custom tuning solutions ensure a seamless integration with your modified exhaust system, preventing fault codes and maintaining smooth operation.
Why Choose Onyx Performance?
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Why is an ECU Remap Essential After a Decat?
Most petrol vehicles are equipped with a primary and secondary lambda (O2) sensor. The primary sensor monitors air-fuel ratios, while the secondary sensor ensures the catalytic converter is working efficiently. When a decat pipe is installed, the second sensor detects that emissions are outside expected parameters, leading to an engine warning light and stored fault codes.
An ECU remap will:
– Disable the second lambda sensor to prevent EML and fault codes
– Optimise fuel delivery for improved throttle response
– Prevent limp mode caused by emissions-related faults
– Ensure the engine runs efficiently with an aftermarket exhaust
For vehicles fitted with a high-flow sports cat instead of a full decat, we can also recalibrate the ECU to align with the reduced emissions restrictions while keeping the system functioning as intended.
Custom ECU Tuning for Decat & Sports Exhausts
We provide custom ECU remaps tailored to your vehicle’s modifications, ensuring the best performance and reliability. Unlike generic tuning files, our remaps are developed to work with your specific setup, whether you have:
– A decat downpipe for increased exhaust flow
– A high-flow sports catalytic converter
– A full performance exhaust system
– Turbo upgrades requiring recalibration of fueling and airflow
Every remap is developed using advanced tuning software and can be tested on our rolling road dyno to ensure optimal results.
Exhaust Upgrades & Performance Downpipes
In addition to ECU remapping, we offer a range of performance exhaust solutions, including:
– Decat downpipes for maximum exhaust flow and sound
– High-flow sports catalytic converters for improved emissions compliance
– Stainless steel cat-back exhaust systems for enhanced performance
– Resonator and muffler deletes for a more aggressive exhaust note
Our exhaust upgrades are carefully selected to complement ECU tuning, ensuring your vehicle benefits from both improved airflow and properly calibrated ECU adjustments.
Book Your Lambda Delete & Catalyst Solution in Slough
Running a decat or upgraded exhaust system? Avoid fault codes and performance issues with our lambda delete & catalyst solutions. Expert ECU recalibration for performance and modified cars. Contact our Slough tuning specialists today to book in.
Who Needs a Decat Remap?
A decat remap is essential for any vehicle that has had its catalytic converter removed or replaced with a high-flow alternative. It is particularly beneficial for:
Performance-focused vehicles
Performance-focused petrol vehicles such as Audi S & RS models, BMW M Series, Mercedes-AMG, Porsche, Volkswagen R models, and other high-performance brands
Turbocharged vehicles
Turbocharged vehicles where a free-flowing exhaust can enhance spool and throttle response
Track or off-road vehicles
Track or off-road vehicles that require a decat for weight reduction and performance gains
We also offer custom solutions for naturally aspirated engines, ensuring the ECU is correctly tuned to avoid unwanted error codes and inefficient fuel mapping.
Specialist ECU Tuning in Slough, Near West London
We are based in Slough, Berkshire, with customers travelling from across the UK for our ECU remapping and exhaust tuning services. Our workshop is conveniently located near major routes including the M25, M4, and M40, making us easily accessible from London, Reading, Maidenhead, Windsor, Ascot, High Wycombe, and surrounding areas. For those looking for specialist tuning solutions, we offer a range of services tailored to high-performance and modified vehicles. This service is sold for offroad/export use only.
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