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Our solutions are characterized by their simple interpretation. They include demonstrative images and are arranged in four fields: Error codes, symptom, cause and solution.

HIGHLIGHT NEWSLETTER

CAR

VW JETTA IV (162, 163, AV3, AV2) 2.0 Total Flex

SYSTEM

PETROL ENGINE - INTAKE / INJECTION

ERROR CODES

00022 - P0016 - Bank 1, camshaft position sensor (G40) crankshaft position sensor (G28). Incorrect numbering.

00808 - P0328 - Knock Sensor 1 Circuit High Input Bank 1 or 1 Sensor

SYMPTOM

Fault codes recorded in the engine control unit.
The vehicle displays one or several of the above - mentioned fault codes.
Engine warning light (MIL) ON.
Squeaking, rattling or jingling noises in the front part of the vehicle.
Engine does not start.

NOTE: The above - mentioned symptom is reproduced when starting the engine.

NOTE: This technical note affects only those vehicles that are within a specific VIN (vehicle identification number) range.

CAUSE

Malfunction of the timing chain tensioner.

SOLUTION

Repair procedure:
- Read the fault codes recorded in the engine control unit using the diagnostic tool.
- Confirm that one or several of the fault codes that appear in the field symptoms of this bulletin are displayed.
- Adjust the engine to the top dead center in rotation direction.
- Check the version of the timing chain tensioner:
- Old tensioner version:
- If more than 4 teeth can be seen, replace the tensioner and the timing chain.

-New tensioner version:
- If more than 6 slots can be seen, replace the timing chain.
- Check the timing chain lower cover. Replace if necessary.
- Check the tensioner operation:
- If the piston can be pushed with the hand inside the tensioner:
- Check the condition of pistons, valves, intake camshaft and camshaft bearings.
- Replace the tensioner and the timing chain if the above-mentioned components are in good condition.
- Replace the engine if they are in poor condition.
- If the piston can NOT be pushed with the hand inside the tensioner:
- Check the condition of the intake camshaft and the camshaft bearings.
- Replace the cylinder head, if damage is observed.
- Carry out an oil change and filter.
- Clear the fault codes recorded in the engine control unit using the diagnostic tool.
- Carry out a second fault code reading of the engine control unit (ECU) using the diagnostic tool and confirm that the fault codes that appear in the field symptoms are NOT recorded.

Also consider:
- Remove the engine block.
- Check the condition of the retention valve.
- If it is broken, replace and remove possible pieces of valve from the lubricant circuit.

NOTE: The reference number of the replacement part depends on the manufacturing date of the vehicle.

See image 1:
A - Location of the timing chain tensioner.