Engine ECU Test and Repair

Below is a sample of Engine Control Units that we can test, repair, program and or supply. We can offer re-code, re-program or plug and play (coded data and programming from old unit) option with most sale/exchange units. If you do not see the part you are looking for please do not hesitate to contact us and one of our friendly team will be glad to assist you.

Engine ECU common faults include CAN BUS communication errors, non start, ignition coil, injectors, accelerator pedal position sensor, O2 sensor, camshaft position sensor, crankshaft position sensor, rough running, poor fuel consumption and more.

What is an ECU?

An engine control unit (ECU) also known as a engine control module (ECM) or powertrain control module (PCM) is a type of electronic control unit that is responsible for controlling a series of actuators on an internal combustion engine to ensure optimal engine performance and running conditions. It does this by reading multiple values from a multitude of sensors within the engine bay, interpreting the data using multidimensional performance maps and adjusting the engine actuators the maintain optimum performance.

Before the use of modern ECUs the air to fuel mixture, ignition timing, and idle speed were mechanically set and dynamically controlled by mechanical and pneumatic means.

Modern ECUs now use a microprocessor which processes all the electronic input values from the engine sensors in real-time and can adjust air to fuel ration, cam angles and ignition timing resulting in optimum engine performance and low emissions.

A cars computer can fail at anytime due a multitude of reasons such as component failure, electrical surges, vibrations and moisture or water ingress. If the ECU detects that a big problem has occurred it may switch the car into “limp mode” which is designed to keep the engine running but at reduced power to prevent any engine damage and to keep emissions low.

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Colin WestColin West
06:44 31 May 22
Great service and really helpful, I've a Renault Master with a mystery electrical fault and nearly bought a new ECU costing about a millon pounds and Shane tested it and cleaned up the contacts on the ECU for a very reasonable price.Even if the issue is not resolved at least it has eliminated the ECU as the culprit. Auto electrics are a tricky area and frankly most garages can't go beyond looking at a diagnostic print out and DTCs (error codes) and are clueless, and usually end up swapping out parts at random costing another million pounds. Go to AP-Reman first!Thanks to Shane for saving me a fortune.I'd thoroughly recommend using them.
nick brocasnick brocas
11:02 28 Apr 22
Sent my fiancées clocks off for repair after receiving several quotes from the big companies and clocks were sent back within a week and for a fraction of the cost. Lifesaver
FastFit AutocentresFastFit Autocentres
17:24 09 Mar 22
All done installed and working fine.
John JohnstonJohn Johnston
16:03 10 Jan 22
I would recommend this company based on my experiences.Sent ABS unit via UPS as recommended - it arrived the next day. I received a call within 2 days to say the unit was fixed and advised the fault was due to contaminated brake fluid so a warranty couldn't be provided & recommended that I thoroughly flushed the system. I admit I was sceptical given a Ford Main dealer had replaced the brake fluid & the brake fluid in the reservoir looked clean/fresh. Paid for repair and the ABS unit was duly posted immediately after payment and ultimately arrived the next day.Before fitting, I duly thoroughly flushed the lines from the brake reservoir to the ABS unit & noticed some contamination. Fitted unit and when trying to flush lines to calipers found some of the caliper bleed screws firmly rusted to the caliper. De-rusted & eventually freed bleed screws and the fluid from the lines was far from clean & clearly significantly contaminated. The root cause was bang on!ABS unit has been working fine for about 3 weeks.CAR:- 2015 (onwards) Ford C-MAX.ABS unit is located behind battery & very fiddly to access ...
Lucy TayorLucy Tayor
18:39 05 Jul 21
Had problem with a Porsche ecu fitted under the seat where it got wet. Looked knackered but expensive to buy even second hand. Sent away to Shane worked his magic with quick reliable service !! Would highly recommend!!

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