P0016 on Skoda: How to Diagnose & Fix

Mk2 (3T) Superbs with the second-generation EA888 1.8 TSI and 2.0 TSI petrol engines are well documented for excessive oil consumption and a timing-chain that stretches. Oil burning is caused by undersized/poorly-draining piston rings and can reach roughly 0.5-2 litres per 1,000 km as mileage climbs past ~100,000 km. Separately, the camshaft timing chain and its tensioner wear, allowing the chain to stretch from around 60,000 miles (100,000 km); this produces a cold-start rattle, rough running, and risk of chain jump and severe valve/piston damage if ignored. Gen3 engines (from ~2011) received a revised tensioner and are far less prone.

The chain-driven 1.2 TSI petrol engine (EA111, fitted to Fabia Mk2 from roughly 2010-2014) is widely reported to suffer premature timing chain stretch caused by a weak chain tensioner that loses oil pressure. Owners report a rattle on cold start-up (especially before the tensioner pressurises), engine warning lights and rough running. If the stretched chain jumps teeth on the camshaft sprocket the valves and pistons can collide, causing catastrophic damage. Briskoda and SEATCupra.net carry owner accounts of chain failures and stretched chains from around 30,000 miles. A revised tensioner was introduced for engines built from about October 2011, so earlier cars are considered highest risk. The later belt-driven EA211 1.0/1.2 TSI (Mk3, 2014 on) does not share this defect.

The EA111 1.2 TSI timing chain tensioner defect affects the Mk2 (2010-2014) Fabia; the Mk3 switched to the belt-driven EA211 1.2 TSI and is not affected. The tensioner cannot hold pressure during a cold start. It is often slightly more common on the Fabia because of the short-trip city use typical of this segment.

Early Gen2 EA888 1.8 and 2.0 TSI petrol engines (roughly 2009-2012 production) suffer a weak timing-chain tensioner that cannot keep the chain taut. The chain can rattle on cold start, then skip/jump teeth, throwing the engine out of time and bending valves or destroying the head. The fault is most associated with the original tensioner design; VW Group revised the tensioner around 2012-2013 and Gen3 engines are far less affected. It is a shared VW Group issue that affects the vRS and other TSI Octavias of this era.

Mk2 Octavias with the EA111 1.2 TSI (CBZA/CBZB) and 1.4 TSI (CAXA) engines suffer premature timing chain tensioner failure. The tensioner cannot maintain pressure during cold starts and shutdowns, causing the chain to slap, jump teeth, or in severe cases damage valves. Common in the 50,000-80,000 mi window. Same defect affects VW Polo/Golf/Touran, Seat Ibiza/Leon, Audi A1 with these engines. The Mk3 Octavia (2013 on) switched to belt-driven EA211 1.2/1.4 TSI engines and is not affected.

The 1.2 TSI 105 PS petrol fitted to the European Rapid is the EA111 CBZB, which uses a timing chain rather than a belt. The chain stretches and the hydraulic tensioner loses its ability to take up the slack, and this can happen at surprisingly low mileage — reported between 60,000 and 100,000 km (roughly 40,000-60,000 miles), well before most owners expect any timing-drive work. The classic early warning is a two-to-three second rattle from the timing end on a cold start before oil pressure builds. If the chain jumps a tooth the valves and pistons meet and the engine is destroyed, so the rattle must not be ignored. Note the later EA211 1.2 TSI (Rapid facelift onwards) uses a toothed belt and is not affected.