M un-powered (rusty
Join Date: Nov 2007
I have had the timing chain re-placed on my 2.2JTS 159 a couple of months ago after 55,000 miles at Alfaworkshop who charge a fixed £550 for the job. This included a new chain and tensioners.
The error codes that led me to the replacement were:
P0010, P0011, P0013 and sometimes P0014. Others have also had the P0016 error code.
When these codes were present, engine rattled slightly when idling, felt through steering and body when starting from cold with a slight rpm fluctuation. When I allowed car to settle down for a minute or so the rattling stopped and rpm settled suggesting the streched chain was possibly causing some oil pressure stability issues.
They did say sometimes a stretched chain causes the Oil Control Solenoid Valves to become stuck/faulty and these may also need replacement if any of the error codes come up. So after a few days after changing the chain, I had just the P0010 error code back with Check Engine Light (CEL) staying on.
P0010 - "A" Camshaft Position Actuator Circuit (Bank 1)
A P0010 code refers to the VVT (variable valve timing) or VCT (variable camshaft timing) components and the car's PCM (powertrain control module). That consists of an oil control valve (OCV), also called a solenoid valve and other components. Basically the check engine light and associated P0010 trouble code means that the voltage in the circuit has fallen below a set limit for a specific amount of time (varies by make/model/engine).
the car also seemed to lack the midrange power and seemed to have a louder intake note under acceleration suggesting the VVT was not working correctly.
A code P0010 may mean that one or more of the following has happened:
Faulty oil control valve (OCV)
Open or short in the VVT/VCT circuit
Open or short in the OCV / solenoid valve
Damaged computer (PCM)
On this engine, P0010 relates to the INTAKE Cam Solenoid valve.
So to be sure, I had replaced both inlet AND Exhaust cam solenoid valves while at it. Both of these solenoids are located directly under the RED JTS cover on the engine, on the left and side inside the cover.
Each solenoid costs about £80 inc VAT. Easy to do, by removing connector and swapping old for new (held by M10 fastener if I remember right).
Once the above was done, all error codes relating to a stretched chain dissapeared and the car now drives smoothly through the rev range with no lack of midrange.
Hope this helps anyone looking for details for a stretched chain.
"With growling revolutions my soul shall transcend"