Found this on the skoda forum.
Skoda TPI. Technical product information
Below is an extract from the ELSA electronic documentation.
There is a lot more for this fault, but at least the issue number is on there:- 2024485/5.
This should give the technicians an idea where to look....Technical product information Transaction No.: 2024485/5
Damage of timing chain tensioner
Release date: 27-Jun-2011
Customer statement / workshop findings
Engine cannot be started, the Check warning lamp is on
In the engine CU, the following fault is stored:• 00022 P0016 CMP Sensor -G40 Engine Speed (RPM) Sensor -G28 Incorrect allocation;• 00808 P0328 Knock Sensor 1-G61 Circuit High.
Technical background
Because of the defective function of the timing chain tensioner, the timing chain may get too loose during the start causing a valve timing change.
This may result in a contact of valves with pistons.
Production change
Reinforced timing chain tensioner – new part 06H 109 467 T.
It was introduced to series production in CW 20, 2010.
Measure Check, repair
1:. VAS check, Guided Fault Search.
2. Remove the lower cover of the timing chain (see Elsa); check the timing chain tensioner function by pressing on the tensioning rail of the timing chain (Fig.1) against the tensioner. If the piston is inserted into the tensioner’s body (see Fig.2), the ratchet of the tensioner’s piston or the tensioner’s latch has been damaged. If you do not find a damaged timing chain tensioner even after a repeated check (see Fig.3), continue with point No. 6
3.. If a damaged timing chain tensioner was found, continue with examining pistons and valves (removing cylinder head or using of endoscope).
4. If pistons and valves are not damaged, replace the timing chain tensioner with the part 06H 109 467 T and carry out a new setting of the timing gear.
5. If pistons and valves are damaged, replace the engine.
6. Prior to a new timing chain setting, check the possible seizing of the camshafts. Repair by replacing the damaged parts
7.. If only the timing chain setting is shifted without the above parts being damaged, the fault was caused by exceeding the maximum engine revolutions (see the printout of the fault memory of the engine CU). In this case, a warranty repair is not possible