Fault message: "Start of injection timing regulation" - Code 17656 in a VW Golf IV (1J5).

Our incident review department has confirmed the solution to a fault that affects the Volkswagen model - GOLF IV Variant (1J5) with 1.9 TDI engine that records a DTC of origin 17656 which tells us that there is a start of injection timing regulation fault in one of the cylinders as its regulation limit has been exceeded. This code is accompanied by various symptoms in the vehicle's engine performance. Below are detailed all the symptoms that appear:
·                     17656 - Start of injection timing regulation. Regulation incorrect. Cylinder 1, 2, 3 or 4. Regulation limits exceeded or below.

·                     Lack of engine power.

·                     Engine malfunctioning.

·                     Difficulty when starting the engine.

·                     Malfunction indicator lamp (MIL) on.

NOTE: This technical note only affects those vehicles equipped with an injection pump.

The following causes may be responsible for the aforementioned symptoms to occur:

·                     The service interval has been exceeded.

·                     There is dirt in the fuel tank and this dirt has clogged the fuel filter.

The solution that our workshop care and support department has successfully carried out is as follows:

·                     Read the fault codes in the engine control unit with the diagnostic tool.

·                     Confirm that the cited fault code is recorded that is mentioned in the symptom field of this technical note.

·                     Check that there is an optimal fuel level.

·                     Ask the customer if they have filled up with a suitable fuel.

·                     Check for leaks in the fuel supply circuit.

·                     Check for fuel impurities and quality.

·                     Replace the fuel filter.

·                     Clear the fault code recorded in the engine control unit.

It should be borne in mind that although the replacement of the fuel filter has prevented the majority of repetitions of this incident in our department, it is possible that the fault is due to another affected component, depending on the symptoms and type of vehicle. 

To be able to extract the fuel gauge correctly, the clips that secure it must be removed with great care. There are three securing clip positions for the fuel gauge which are located as shown in the image.

Park assist

Park assist systems are designed to help the driver during parking manoeuvres. The most used systems are those with ultrasonic parking sensors or a rear camera.  

Ultrasonic parking system

This is based on the use of sensors installed in the bumpers distributed strategically to cover a wide area. These sensors are mounted on the rear bumper and optionally on the front and are controlled by a control unit. 

The system is activated automatically on engaging reverse gear, the sensors are activated and emit an ultrasonic pulse that travels through the air. If there is an obstacle, the ultrasonic pulse will rebound from it and return to the sensor which will detect the pulse and inform the control unit. The control unit makes the calculation of the distance to the obstacle based on the time elapsed between the emission and the reception of the pulse. The maximum detection distance is approximately 0.8 to 1 metre.


The control unit emits an acoustic warning so that the driver knows the distance of the obstacle. These warnings are transmitted through independent loudspeakers or through the vehicle's audio system. As the vehicle nears an obstacle, the repeat rate of the audible warning increases. When the object is less than 30 centimetres from the centre of the vehicle’s bumper, the acoustic warning will sound continuously. 

Engine fault indicator light on

VW POLO 9N / IBIZA 6K

In this post, a fault is considered that causes the engine fault warning light to remain permanently on.

 


The models that can be affected are the following:

VW POLO 9N Motor 1.4-1.2 (BBY-AZQ) VW POLO 9N Engine 1.4-1.2 (BBY-AZQ)
SEAT IBIZA 6L Motor 1.4-1.2 (BBY-AZQ) SEAT IBIZA 6L Engine 1.4-1.2 (BBY-AZQ)


SYMPTOMS


- The engine fault light comes on.

- The vehicle jerks slightly.

- Excessive fuel consumption.

Fault in the fuel flow control solenoid valve – KIA Engine J3 2.9 CRDi

MAKES AND MODELS AFFECTED

KIA:

KIA CARNIVAL / GRAND CARNIVAL III (VQ) 2.9 CRDi (J3) 136 kW (185 CV) ’06-

The manufacturing date of the affected vehicles: 

03.2006 (start of production) to 10.12.2007.

SYMPTOMS

The symptoms that may be found are the following:

• Engine fault indicator light (EOBD) on.

• Fault message on the instrument panel multifunction screen.

• The engine control unit enters an emergency/reduced power phase.

The following fault code is recorded on the diagnostics machine:

P0088 – Pressure too high in the fuel common rail. 

There may be more associated fault codes seen on the diagnostic machine.