I was recently doing a service on a 2009 Toyota Corolla Ascent ZR152R 1.8L Auto (motor: 2ZRFE) and I accidentally removed the Timing Chain Tensioner, it sprung out at me pretty fast & scared **** out of me so I bolted it straight back in & didnt realise what I had actually removed & how serious this mistake was until the Engine Light came on & i connected OBDII Scanner. A few kms up the road the Engine light came on the dash so I connected my OBDII Reader to find Code: P0017 (Camshaft/Crankshaf Position Correlation Bank 1-Sensor B).
I replaced the Timing Chain Tensioner with a new one, cleared the fault Code:P0017 & disconnected the -Negative Battery Terminal for over 1minute to reset the sensors learned values. Fault code:P0017 was erased but returned within a few minutes along with Wngine Light on the dash, so with the OBDII Scanner still connected & the car idleing I unplugged the Cam Position Sensors + the Crankshaft Position Sensor (disconnected 1 at a time & checked Codes) they all registered new codes for each sensor that was disconnected at the time of fault so I'm pretty sure they are all ok. I'v checked over the engine for any loose/worn connectors & everything looks good. I also changed the engine oil 5W-30 & filter + put new Spark Plugs in while I was going. I'm wondering if the Timing Chain may have jumped a tooth when I accidentally removed the Tensioner as it did spring out pretty hard & fast. Now the car does idle a little bit low at 666rpm but it still drives fine. Everytime I delete Code:P0017 it keeps coming back on within a few minutes & I'm unsure what to do from here so any advice would be greatly appreciated. If the timing has jumped a tooth shouldnt it be either running really rough or not at all?
Is it possible to check Timing without taking apart the motor? If not, can I get away with only removing the Tappet Cover to re-adjust the Timing Chain or do I also need to remove all the Pulley's, Engine Mount & Sidecase (Chain Cover) to make sure the Crankshaft Timing Mark is still alligned at the bottom?
This isn't my car as I was doing my aunt a favour & doing a service for her for free, I stuffed it up so now the repair costs are coming out of my pocket so i need the cheapest, quickest & easiest way to repair (if there is one). Cheers for everybody's help in advance.
