Dear Car Gurus,

Please Help!

I have a 2007 corolla which originally had a P0016 code and was running rough, especially at idle.
It runs fine when the car is hot.

Also usually, if you rev it at idle and keep it at 3000rpm for about 30 seconds, it runs smoother but it now would stay at 1500rpm before later coming down to normal idle speed.

We have replaced vvt solenoid, done engine flush, changed oil and filter because of sludge, replaced camshaft with actuator, replaced tensioner, reset the timing several times but all to no avail.

Any help or advise would be highly appreciated.

Your location?

mayor2013:
Your location?

Gbagada

WebMania:

Gbagada

Contact autologic he is closer to you


https://www.nairaland.com/honmusa

mayor2013:


Contact autologic he is closer to you


https://www.nairaland.com/honmusa

Hmm! Make i no talk, cos the guy used to be my guy.
Do you have any other suggestions for me apart from the referral?

This is a case of using substandard engine oil. The op is the one suffering from this problem now. Go and get a used engine and use the right oil as recommended by Toyota

sooperrescue:
This is a case of using substandard engine oil. The op is the one suffering from this problem now. Go and get a used engine and use the right oil as recommended by Toyota

The oil is right here

sooperrescue:
This is a case of using substandard engine oil. The op is the one suffering from this problem now. Go and get a used engine and use the right oil as recommended by Toyota

Huh?!!!

Please explain / give more details...

I also use 5w30 when changing my oil. But I know most people use Mobil 20W50 for several years without developing this particular issue.
Sure, their engine may smoke a little, but they don't go around with P0016 error codes.

There are many 5w30 in the market. But they are not convenient for your car else there will not be sludge in a Toyota Engine. When you check your oil chamber cover, which oil and specification did Toyota ask you to use? There are 5w30 SJ, 5w30 SL and for your brand of Toyota, maybe 0w20 or 5w30 but with the API number. If you use 5w30 and you have sludge, the oil is not good for your car.
This is what OBDcodes have to say about p0016.

P0016 - Crankshaft Position - Camshaft Position Correlation (Bank 1 Sensor A) Crankshaft Position - Camshaft Position Correlation (Bank 1 Sensor A) What does that mean? This diagnostic trouble code (DTC) is a generic powertrain code, which means that is applies to OBD-II equipped vehicles, including but not limited to Ford, Dodge, Toyota, VW, Honda, Chevrolet, Hyundai, Audi, Acura, etc. The crankshaft position sensor (CKP) and Camshaft position sensor (CMP) work in harmony to control the spark/fuel delivery and timing. They both consist of a reluctor, or tone, ring which passes over a magnetic sensor, which generates a voltage, indicating position. The crankshaft sensor is part of the primary ignition system and functions as the "trigger". It detects the position of the crankshaft relays that information on to the PCM or the ignition module (depending on the vehicle) to control spark timing. The Camshaft position sensor detects the position of the camshafts and relays the information to the PCM. The PCM uses the CMP signal to identify the beginning of the injector sequence. What ties these two shafts and their sensors together is the timing belt or chain. The cam and crank should be precisely timed together. If the PCM detects that the Crank and Cam signals are out of time by a specific number of degrees, this P0016 code will set. Symptoms Symptoms of a P0016 will or may include: Malfunction Indicator Lamp (MIL) illumination The engine may run but with reduced performance The engine may crank but not start The engine may exhibit a rattle near the harmonic balancer indicating the tone ring is damaged The engine may start and run, but poorly Causes Causes may include: Timing chain stretched, or timing belt skipped a tooth due to wear Misalignment of timing belt/chain Tone ring on crankshaft slipped/broken Tone ring on camshaft slipped/broken Bad crank sensor Bad cam sensor Damaged wiring to crank/cam sensor Timing belt/chain tensioner damaged Possible Solutions First, visually inspect the cam and crank sensors and their harnesses for damage. If you notice broken/frayed wires, repair and recheck. If you have access to a scope, check the cam and crank patterns. If a pattern is missing, suspect a bad sensor or a slipping tone ring. Remove the cam gear and the crankshaft harmonic balancer and inspect the tone rings for proper alignment and make sure they're not loose or damaged or that they haven't sheared the key that aligns them. If they are properly installed, replace the sensor. If the signal appears normal, then check the timing chain/belt for proper alignment. If it's misaligned, check for a damaged tensioner that may have allowed the chain/belt to slip a tooth or several teeth. Also check that the belt/chain isn't stretched. Repair and recheck.

Read more at: https://www.obd-codes.com/p0016
Copyright OBD-Codes.com

sooperrescue:
There are many 5w30 in the market. But they are not convenient for your car else there will not be sludge in a Toyota Engine. When you check your oil chamber cover, which oil and specification did Toyota ask you to use? There are 5w30 SJ, 5w30 SL and for your brand of Toyota, maybe 0w20 or 5w30 but with the API number. If you use 5w30 and you have sludge, the oil is not good for your car.
This is what OBDcodes have to say about p0016.

P0016 - Crankshaft Position - Camshaft Position Correlation (Bank 1 Sensor A) Crankshaft Position - Camshaft Position Correlation (Bank 1 Sensor A) What does that mean? This diagnostic trouble code (DTC) is a generic powertrain code, which means that is applies to OBD-II equipped vehicles, including but not limited to Ford, Dodge, Toyota, VW, Honda, Chevrolet, Hyundai, Audi, Acura, etc. The crankshaft position sensor (CKP) and Camshaft position sensor (CMP) work in harmony to control the spark/fuel delivery and timing. They both consist of a reluctor, or tone, ring which passes over a magnetic sensor, which generates a voltage, indicating position. The crankshaft sensor is part of the primary ignition system and functions as the "trigger". It detects the position of the crankshaft relays that information on to the PCM or the ignition module (depending on the vehicle) to control spark timing. The Camshaft position sensor detects the position of the camshafts and relays the information to the PCM. The PCM uses the CMP signal to identify the beginning of the injector sequence. What ties these two shafts and their sensors together is the timing belt or chain. The cam and crank should be precisely timed together. If the PCM detects that the Crank and Cam signals are out of time by a specific number of degrees, this P0016 code will set. Symptoms Symptoms of a P0016 will or may include: Malfunction Indicator Lamp (MIL) illumination The engine may run but with reduced performance The engine may crank but not start The engine may exhibit a rattle near the harmonic balancer indicating the tone ring is damaged The engine may start and run, but poorly Causes Causes may include: Timing chain stretched, or timing belt skipped a tooth due to wear Misalignment of timing belt/chain Tone ring on crankshaft slipped/broken Tone ring on camshaft slipped/broken Bad crank sensor Bad cam sensor Damaged wiring to crank/cam sensor Timing belt/chain tensioner damaged Possible Solutions First, visually inspect the cam and crank sensors and their harnesses for damage. If you notice broken/frayed wires, repair and recheck. If you have access to a scope, check the cam and crank patterns. If a pattern is missing, suspect a bad sensor or a slipping tone ring. Remove the cam gear and the crankshaft harmonic balancer and inspect the tone rings for proper alignment and make sure they're not loose or damaged or that they haven't sheared the key that aligns them. If they are properly installed, replace the sensor. If the signal appears normal, then check the timing chain/belt for proper alignment. If it's misaligned, check for a damaged tensioner that may have allowed the chain/belt to slip a tooth or several teeth. Also check that the belt/chain isn't stretched. Repair and recheck.

Read more at: https://www.obd-codes.com/p0016
Copyright OBD-Codes.com

Thanks for your response. I've been to that website too.
However, I still don't understand the relationship between this (https://www.obd-codes.com/p0016) and your advice to replace the engine.

NOTE: Toyota engines typically have sludge problem (especially at high mileages) even with using correct oil grade.

Which oil were you using? If you did all the work that you described and the engine is still not perfect, then change the engine. The timing was not properly set and after repairs, you are still encountering the same issue, let it go and get a new engine. Toyota engines does not have sludge even when you use the conventional oils. After 3 months, change the oil but when you are using synthetic, every six months, you drain and I guarantee that you will never see sludge even if the mileage is 200000 miles.

WebMania:
Dear Car Gurus,

Please Help!

I have a 2007 corolla which originally had a P0016 code and was running rough, especially at idle.
It runs fine when the car is hot.

Also usually, if you rev it at idle and keep it at 3000rpm for about 30 seconds, it runs smoother but it now would stay at 1500rpm before later coming down to normal idle speed.

We have replaced vvt solenoid, done engine flush, changed oil and filter because of sludge, replaced camshaft with actuator, replaced tensioner, reset the timing several times but all to no avail.

Any help or advise would be highly appreciated.

Your timing chain may be stretched.. I would advise you change your chain/tensioner/chain guides.

Try talking to Gazzuz.

Hi,

We're you finally able to resolve this problem?

I'm having the same error code in Toyota Highlander 2004. Mechanic has checked the timing belt and it's fine.

WebMania:
Dear Car Gurus,

Please Help!

I have a 2007 corolla which originally had a P0016 code and was running rough, especially at idle.
It runs fine when the car is hot.

Also usually, if you rev it at idle and keep it at 3000rpm for about 30 seconds, it runs smoother but it now would stay at 1500rpm before later coming down to normal idle speed.

We have replaced vvt solenoid, done engine flush, changed oil and filter because of sludge, replaced camshaft with actuator, replaced tensioner, reset the timing several times but all to no avail.

Any help or advise would be highly appreciated.

Blizzle:
Hi,

We're you finally able to resolve this problem?

I'm having the same error code in Toyota Highlander 2004. Mechanic has checked the timing belt and it's fine.

Read a couple of posts here to point you to the way forward

https://www.nairaland.com/3661728/on-board-diagnostics-obd-ii-questions/8#55044454

Are you in Lagos?

Blizzle:
Hi,

We're you finally able to resolve this problem?

I'm having the same error code in Toyota Highlander 2004. Mechanic has checked the timing belt and it's fine.

Its best you change that belt as its already stretched.

Your mechanic cannot ascertain the condition by just looking at it.

yes I'm in Lagos

AutoElectNG:


Read a couple of posts here to point you to the way forward

https://www.nairaland.com/3661728/on-board-diagnostics-obd-ii-questions/8#55044454

Are you in Lagos?