The engine does not start: Immobiliser or key error

Our Department's review of incidents has confirmed a curiosity that affects the whole range of models of Volkswagen fitted with the immobiliser-transponder system. 

DTCs are recorded with immobiliser fault and key signal not identified. Various symptoms in the performance of the vehicle's engine are added together with these fault codes.

Below are detailed all the symptoms that appear: 

VW logo.

-P0513 - Incorrect code of the immobiliser.

-P1177 - 1177 - Key, signal not plausible.

-Engine does not start occasionally.

-Warning message on the instrument panel display which states the following: “Immobilizer enabled".


NOTE: This technical note only affects vehicles fitted with a transponder-immobiliser system. 

Volkswagen Group, 1.6 CAYC diesel engine, exhaust gas recirculation system - EGR.

Diesel engine 1.6 CAYC
Technical specifications.
• 4 cylinder, 1,598 cm³ turbo-diesel engine developed by the VAG group.
• The engine has a double overhead camshaft and 16 valves.
• Common rail direct injection system with piezoelectric injectors.
• Charge air system with variable geometry turbocharger and intercooler.
• Catalytic converter with particulate filter.
• EGR solenoid valve with exhaust gas recirculation cooling.
• Meets Euro 5 anti-pollution standard.

Torque and power curves:

Exhaust gas recirculation EGR.
The purpose is to reduce nitrogen oxide emissions. A part of the exhaust gases are fed back into the combustion process. The engine control unit regulates the flow of recirculated exhaust gases, while taking into consideration the engine speed, the amount of aspirated air, the aspirated air temperature, amount injected and air pressure.

Tensioning of the parking brake in the BMW 1 Series and 3 Series

In this post, instructions as provided by the brand are given for correctly tensioning the parking brake in the 1 series and 3 series BMW.
This process affects the following bodies:

1 Series: E81, E82, E87 and E88.
3 Series: E90, E91, E92 and E93.


Note:

The hand brake must be adjusted if:
• The parking brake shoes or other parts in the assembly are replaced.
• The brake discs are replaced.
• Excessive travel (10 teeth).
• Renewal of the parking brake Bowden cables.

Tensioning process

First, detach the hand brake lever bellows. It is recommended to use plastic levers so as not to damage the vehicle's interior.
Lever the points indicated in the images to disengage the bellows and extract them over the lever.

P2294 fault codes recorded in the AUDI TT

From our Call Centre, we have been able to confirm the repetition of several faults in the Audi TT, where a code relating to the fuel pressure has been recorded.

  

• 08852 – P2294 – Fuel pressure regulating valve (N276). Interruption.

• 18726 – P2294 – Fuel pressure regulating valve (N276). Interruption.

In this case, the displayed fault code reading from the engine control unit will be fault code P2294 but, depending on the diagnostic tool used, it is possible that a decimal code will be recorded that may match the two options we give.

The Malfunction Indicator Light (MIL) is on due to a fault in the fuel circuit and there is a considerable lack of power.

The cause of this fault is a failure of the power supply of the fuel pressure regulating valve (N276), which comes from the engine component relay (J757).

To properly repair this fault, take the following steps:

- Check the electrical connection of the fuel pressure regulating valve and its power supply.

Thanks to our dis-net tool, we can access the engine diagram, the location and the monitoring of values of the fuel pressure regulating valve as shown in the image. 

Engine diagram. www.dis-net.com platform / Check on the N267