₦airaland Forum

My Corolla 06 usually delay when the gear is engage only in the morning or when the car is parked for atleast 5 hours. I scanned it and I got P0500, something related VSS fault /speed sensor. Pls who do I call? Rewire or mechanic!
I have also watched some YouTube video and I noticed the sensor is attached to the gearbox.

dapotemi:
My Corolla 06 usually delay when the gear is engage only in the morning or when the car is parked for atleast 5 hours. I scanned it and I got P0500, something related VSS fault /speed sensor. Pls who do I call? Rewire or mechanic!
I have also watched some YouTube video and I noticed the sensor is attached to the gearbox.

VSS code won't make your car to delay
Try replace transmission oil and filter if that will solve the issue if not get ready to replace the transmission.

I don't have the tools to change the plugs. Do you stay in Lagos?

2cribz:
The point is. Do you know how to change plugs or na mechanic. If na mechanic go do am.tellme now..cos e no go work and also ud need to have an extra battery or new battery because after every.your engine might take abt 6 to cranks b4 it starts.and if your ba3 no strong.2 cranks.ba3 don flat. Bad fuel in naija is what causes your piston rings from factory to seize and causing mad oil consumption..oil burn....blue smoke. but our quacks here wid quickly jump up and say ring engine ..change piston rings.in the process they wont torque the engine springs back to factory.ud now be experiencing overheating..timing chain or belt skipping. Oil burning after 2 months.etc. but the DIY procedure shuld be done every 6 months becos of fake fuel and fake engine oil

Nope,in the main time add about a cup of atf and a cup of engine oil into crankcase,so e go dey wash the engine snall small

charliechyke:
I don't have the tools to change the plugs. Do you stay in Lagos?

Alaye either your gear oil is overfilled or underfillled. Put gear in park,hand brake up,put gear in reverse while handbrake is up,remove the dipstick, wipe the oil,reinsert the gear oil stick and guage. If the oil no reach hot max level. Problem found.. if e pass hot mark /guage,drain about half liter and re guage... if its guaged fully, colour should be pink or a lil light pink,if its brown . Oil don sapa..drain all of it n refil wt toyota 4 5 litres atf..if after refil e still dey sapa,then d gear do sapa be that

dapotemi:
My Corolla 06 usually delay when the gear is engage only in the morning or when the car is parked for atleast 5 hours. I scanned it and I got P0500, something related VSS fault /speed sensor. Pls who do I call? Rewire or mechanic!
I have also watched some YouTube video and I noticed the sensor is attached to the gearbox.

Good evening, my RX 350 AWD, I parked it down for a year, when I eventually start up, the gear jerks and clunks so much when shifting, Oil was replaced immediately and the jerking / clunking sound reduced drastically. Now it changes smoothly but makes a little clunking sound when entering only the first gear while on transit. Other gear changes smoothly.
Please help.

Please WHICH gear oil to use for Toyota highlander 2005 V6? How many litre im going to buy?

My 2008 Camry 2.4L keeps throwing P0303 and P0172 codes. I've already swapped out the plugs, coils, and fuel nozzle, and an electrician checked the wiring, finding no issues. The engine idles rough and jerks at low speeds. When I unplug the coil wire for cylinder #3 while idling, there's barely any change in the RPM. My mechanic thinks it's an engine problem with cylinder #3.

Have anyone encountered such issue before, I'm afraid of bringing the engine down.

Edunwa302:
My 2008 Camry 2.4L keeps throwing P0303 and P0172 codes. I've already swapped out the plugs, coils, and fuel nozzle, and an electrician checked the wiring, finding no issues. The engine idles rough and jerks at low speeds. When I unplug the coil wire for cylinder #3 while idling, there's barely any change in the RPM. My mechanic thinks it's an engine problem with cylinder #3.

Have anyone encountered such issue before, I'm afraid of bringing the engine down.

Did you have overheating issue with the car recently?
You might be having top gasket issues.

Abbeyismo:
Did you have overheating issue with the car recently?
You might be having top gasket issues.

Never overheated before

Edunwa302:
Never overheated before

If all the wiring has been check and confirm they are okay,plus the ECU, check the valves one of them might be stick

Abbeyismo:
If all the wiring has been check and confirm they are okay,plus the ECU, check the valves one of them might be stick

How do I check ECU, please

Edunwa302:
How do I check ECU, please

Ur electrician can do that for you to check if it pulsing or not

Edunwa302:
My 2008 Camry 2.4L keeps throwing P0303 and P0172 codes. I've already swapped out the plugs, coils, and fuel nozzle, and an electrician checked the wiring, finding no issues. The engine idles rough and jerks at low speeds. When I unplug the coil wire for cylinder #3 while idling, there's barely any change in the RPM. My mechanic thinks it's an engine problem with cylinder #3.

Have anyone encountered such issue before, I'm afraid of bringing the engine down.

Good day sir,

Thank you for explaining the situation clearly. We understand why this is worrying — especially after replacing several components and still seeing the same fault. You’re right to pause before allowing anyone to “open the engine.” 👍

Vehicle: Toyota Camry 2008
Engine: 2.4L (2AZ-FE)

Let’s break this down properly and remove the fear and guesswork.

⸻

🔧 Professional Diagnostic Insight — Camry 2.4L (P0303 & P0172)

Reported Symptoms:
• Persistent P0303 (Cylinder #3 misfire)
• P0172 (System too rich – Bank 1)
• Rough idle
• Jerking at low speed
• Swapping plugs, coils, and injector made no difference
• Unplugging coil #3 causes little or no RPM drop

This combination tells us something very important:

⚠️ Cylinder #3 is contributing little to nothing at idle, and the ECU is over-fueling to compensate.

⸻

🚨 Critical Observation (Very Important)

You have already ruled out:
• Spark plug
• Ignition coil
• Injector
• External wiring faults

That immediately narrows the issue down to mechanical or air/fuel control imbalance, not electrical guesswork.

However — this does not automatically mean the engine must be opened.

⸻

🔍 Likely Root Causes (Ranked by Experience)

1️⃣ Intake Manifold / Vacuum Leak at Cylinder #3 (Very Common)

On the 2AZ-FE engine:
• Intake manifold gasket leaks often affect specific cylinders
• Cylinder #3 is a known hotspot

This causes:
• Lean misfire on one cylinder
• ECU compensates by adding fuel → P0172
• Coil unplug test shows little change because the cylinder is already weak

➡️ This is frequently misdiagnosed as a bad engine.

⸻

2️⃣ Valve Seating Issue (Not Full Engine Failure)

Possible but less severe than people fear:
• Slightly burnt exhaust valve
• Carbon buildup preventing full valve seal

This results in:
• Low compression on cylinder #3
• Poor idle contribution
• Misfire mainly at low RPM

⚠️ This can often be confirmed without opening the engine using proper tests.

⸻

3️⃣ Stuck-Open Injector or Fuel Control Error

Even if the injector was changed:
• Aftermarket injectors can over-fuel
• ECU trims may be heavily skewed due to long-term misfire

This causes:
• Rich mixture code
• Rough idle
• Cylinder imbalance

⸻

4️⃣ ECM Fuel Trim Adaptation Not Reset

After repeated parts replacement:
• ECU continues using old correction data
• Misfire and rich codes persist even after good parts are installed

⸻

🔎 What Tests Should Be Done FIRST (Before Any Engine Work)

Before anyone talks about “bringing the engine down,” the following must be done:

✔️ Cylinder compression test (dry & wet)
✔️ Leak-down test (pinpoints valves vs rings)
✔️ Intake smoke test (checks gasket & vacuum leaks)
✔️ Live data review (short- & long-term fuel trims)
✔️ Power balance test via scan tool

Only these will tell the truth.

⸻

🚫 What This Is NOT
• Not coil brand
• Not spark plug heat range
• Not random injector swapping
• Not wiring guesswork

Opening the engine without these confirmations is risky and expensive.

⸻

⚙️ Ryan Automotive Limited — Professional Take

From experience, over 60% of Camry 2AZ-FE cylinder-specific misfires end up being:
• Intake gasket leaks
• Minor valve sealing issues
• Fuel trim mislearning

Not total engine failure.

An engine should only be opened when mechanical loss is proven, not assumed.

⸻

📌 Recommended Next Steps

We strongly advise:
• Full Toyota live-data diagnostic scan
• Compression & leak-down testing
• Intake system smoke test
• ECU adaptation reset after confirmation

📍 Clients bring vehicles to Ryan Automotive Limited from different areas because we diagnose first, repair once, and avoid unnecessary engine work.

If you want clarity and peace of mind before making a costly decision, you’re welcome to bring the vehicle in.

Ryan Automotive Limited
Precision • Transparency • Excellence
📍 Lagos, Nigeria

My sienna odometer reading goes off and makes the speedometer to stop working and comes back on again while in motion, What could be the cause?

Hello Good people,Can anyone recommend a tested and trusted Kia mechanic here on Nairaland? There is an urgent job for the person.

Thank you very much.

sucobaba:
Hello Good people,Can anyone recommend a tested and trusted Kia mechanic here on Nairaland? There is an urgent job for the person.

Thank you very much.

Where is ur location sir ?
You can reach out to me.

Remove front tyres,the wheel sensor don sapa or cut or got disconnected. Check am. E be like round plastic with shiny steel face sensor or black face..oil fit don block am. Remove,inspect ,clean or use carb cleaner or iron sponge clean am.no make rewire scam u.

chubaba1990:
My sienna odometer reading goes off and makes the speedometer to stop working and comes back on again while in motion, What could be the cause?

Edunwa302:
How do I check ECU, please

you plug scanner, dont do wire sparking B4 you toast your ECU

Edunwa302:
My 2008 Camry 2.4L keeps throwing P0303 and P0172 codes. I've already swapped out the plugs, coils, and fuel nozzle, and an electrician checked the wiring, finding no issues. The engine idles rough and jerks at low speeds. When I unplug the coil wire for cylinder #3 while idling, there's barely any change in the RPM. My mechanic thinks it's an engine problem with cylinder #3.

Have anyone encountered such issue before, I'm afraid of bringing the engine down.

your car will behave as if it has HIV once your Injectors where swapped, simple reason cos they are coded to Engine cylinder number ,Now plenty mechanics do not know this, You need a dealer level scanning tool to program them to respective cylinders. There is a number on Each Injectors so go to someone with a fairly decent scan tool to program them with the numbers on them. Start from there.

RyanAutomotive:
Good day sir,

Thank you for explaining the situation clearly. We understand why this is worrying — especially after replacing several components and still seeing the same fault. You’re right to pause before allowing anyone to “open the engine.” 👍

Vehicle: Toyota Camry 2008
Engine: 2.4L (2AZ-FE)

Let’s break this down properly and remove the fear and guesswork.

⸻

🔧 Professional Diagnostic Insight — Camry 2.4L (P0303 & P0172)

Reported Symptoms:
• Persistent P0303 (Cylinder #3 misfire)
• P0172 (System too rich – Bank 1)
• Rough idle
• Jerking at low speed
• Swapping plugs, coils, and injector made no difference
• Unplugging coil #3 causes little or no RPM drop

This combination tells us something very important:

⚠️ Cylinder #3 is contributing little to nothing at idle, and the ECU is over-fueling to compensate.

⸻

🚨 Critical Observation (Very Important)

You have already ruled out:
• Spark plug
• Ignition coil
• Injector
• External wiring faults

That immediately narrows the issue down to mechanical or air/fuel control imbalance, not electrical guesswork.

However — this does not automatically mean the engine must be opened.

⸻

🔍 Likely Root Causes (Ranked by Experience)

1️⃣ Intake Manifold / Vacuum Leak at Cylinder #3 (Very Common)

On the 2AZ-FE engine:
• Intake manifold gasket leaks often affect specific cylinders
• Cylinder #3 is a known hotspot

This causes:
• Lean misfire on one cylinder
• ECU compensates by adding fuel → P0172
• Coil unplug test shows little change because the cylinder is already weak

➡️ This is frequently misdiagnosed as a bad engine.

⸻

2️⃣ Valve Seating Issue (Not Full Engine Failure)

Possible but less severe than people fear:
• Slightly burnt exhaust valve
• Carbon buildup preventing full valve seal

This results in:
• Low compression on cylinder #3
• Poor idle contribution
• Misfire mainly at low RPM

⚠️ This can often be confirmed without opening the engine using proper tests.

⸻

3️⃣ Stuck-Open Injector or Fuel Control Error

Even if the injector was changed:
• Aftermarket injectors can over-fuel
• ECU trims may be heavily skewed due to long-term misfire

This causes:
• Rich mixture code
• Rough idle
• Cylinder imbalance

⸻

4️⃣ ECM Fuel Trim Adaptation Not Reset

After repeated parts replacement:
• ECU continues using old correction data
• Misfire and rich codes persist even after good parts are installed

⸻

🔎 What Tests Should Be Done FIRST (Before Any Engine Work)

Before anyone talks about “bringing the engine down,” the following must be done:

✔️ Cylinder compression test (dry & wet)
✔️ Leak-down test (pinpoints valves vs rings)
✔️ Intake smoke test (checks gasket & vacuum leaks)
✔️ Live data review (short- & long-term fuel trims)
✔️ Power balance test via scan tool

Only these will tell the truth.

⸻

🚫 What This Is NOT
• Not coil brand
• Not spark plug heat range
• Not random injector swapping
• Not wiring guesswork

Opening the engine without these confirmations is risky and expensive.

⸻

⚙️ Ryan Automotive Limited — Professional Take

From experience, over 60% of Camry 2AZ-FE cylinder-specific misfires end up being:
• Intake gasket leaks
• Minor valve sealing issues
• Fuel trim mislearning

Not total engine failure.

An engine should only be opened when mechanical loss is proven, not assumed.

⸻

📌 Recommended Next Steps

We strongly advise:
• Full Toyota live-data diagnostic scan
• Compression & leak-down testing
• Intake system smoke test
• ECU adaptation reset after confirmation

📍 Clients bring vehicles to Ryan Automotive Limited from different areas because we diagnose first, repair once, and avoid unnecessary engine work.

If you want clarity and peace of mind before making a costly decision, you’re welcome to bring the vehicle in.

Ryan Automotive Limited
Precision • Transparency • Excellence
📍 Lagos, Nigeria

AI??

erico2k2:
your car will behave as if it has HIV once your Injectors where swapped, simple reason cos they are coded to Engine cylinder number ,Now plenty mechanics do not know this, You need a dealer level scanning tool to program them to respective cylinders. There is a number on Each Injectors so go to someone with a fairly decent scan tool to program them with the numbers on them. Start from there.

This car is almost 20 years old, you do NOT need to programme any Injector or code injector to the engine number or VIN or anything. Its plug and play. If the injector is meant for the engine, it will work.

Edunwa302:
My 2008 Camry 2.4L keeps throwing P0303 and P0172 codes. I've already swapped out the plugs, coils, and fuel nozzle, and an electrician checked the wiring, finding no issues. The engine idles rough and jerks at low speeds. When I unplug the coil wire for cylinder #3 while idling, there's barely any change in the RPM. My mechanic thinks it's an engine problem with cylinder #3.

Have anyone encountered such issue before, I'm afraid of bringing the engine down.

If you've swapped injectors, coils and plugs, and have tested to confirm that the wire that supplies power to the coil and injector is fine, then indeed, your engine valve is the problem.

My honda accord 2007 keeps misfiring, what could be the problem. How do I clean the throttle body?

lawmanlala:
My honda accord 2007 keeps misfiring, what could be the problem. How do I clean the throttle body?

Misfiring and throttle body cleaning are not d same thing.
Scan the car and drop the scan result sir.

tempest12:
Good evening, my RX 350 AWD, I parked it down for a year, when I eventually start up, the gear jerks and clunks so much when shifting, Oil was replaced immediately and the jerking / clunking sound reduced drastically. Now it changes smoothly but makes a little clunking sound when entering only the first gear while on transit. Other gear changes smoothly.
Please help.

Good evening sir,

Thank you for the detailed explanation.

From your report — Lexus RX 350 AWD, parked for about one year, initial heavy jerking/clunking on engagement, transmission oil replaced with major improvement, now only a slight clunk when entering 1st gear while in motion — this is a post-storage driveline slack and load-take-up condition, not a failed gearbox.

For future diagnostics, always include the vehicle year, mileage,. It helps narrow the fault faster and more accurately.

⸻

🔧 Professional Diagnostic Insight

1️⃣ Long-Term Parking Effect (Primary Cause)

When a vehicle sits for a year:

• Transmission clutch packs partially drain
• Hydraulic pressure adaptation resets
• Engine & transmission mounts stiffen or weaken
• AWD transfer case components lose fluid film balance

When first driven, harsh engagement is common.
The fact that fluid replacement reduced the issue drastically confirms that internal transmission damage is unlikely.

⸻

2️⃣ Remaining Clunk Only in 1st Gear (Key Observation)

Since:
• All other gears shift smoothly
• The clunk happens mainly when entering 1st gear while rolling

This indicates driveline slack being taken up, not slipping.

Common sources on RX 350 AWD:

• Engine mount or transmission mount wear
• Front differential backlash
• AWD transfer case play
• Propeller shaft joint play
• Subframe bushings slightly loose

First gear produces the highest torque multiplication, so any small play in the system is most noticeable there.

⸻

3️⃣ Why It Does Not Happen in Higher Gears

Higher gears apply:
• Lower torque load
• Smoother engagement
• Less driveline shock

So the noise disappears — another sign the transmission itself is functioning correctly.

⸻

⚙️ Ryan Automotive Workshop – Professional Take

This is not a reason for overhaul.

Your gearbox is responding well after fluid service. What remains is most likely:

• Minor driveline backlash
• Mount-related movement
• AWD torque transfer slack

These are mechanical take-up sounds, not internal failure.

⸻

✅ Professional Summary & Next Steps

To settle this permanently, the vehicle needs:

✔️ Engine & transmission mount inspection
✔️ AWD transfer case and front differential check
✔️ Prop shaft & CV joint inspection
✔️ Subframe bolt torque verification
✔️ Scan tool transmission adaptation reset (if needed)
✔️ Confirm correct ATF type and level (checked at operating temperature)

Avoid aggressive acceleration from low speed until inspection is done.

📍 Clients come to us from different locations — distance is never a barrier when the diagnosis must be done properly.

If you want this inspected correctly and resolved without guesswork, bring the vehicle in for a professional driveline evaluation.

Ryan Automotive Limited
Precision. Transparency. Excellence.
Professional Auto Diagnostics • Transmission • AWD Systems
📍 Lagos, Nigeria

—
For future inquiries, please include:
Vehicle Year | Mileage | Recent Repairs

Please what is the best affordable plugs for honda accord 2007. Is there a particular brand of plugs that works better with honda?

My 2013 camry SE engine vibrates when the car is in Reverse on AC.

Defcon1:
My 2013 camry SE engine vibrates when the car is in Reverse on AC.

Have you by any means work on the AC before? Maybe change the compressor to manual instead of the factory automatic?

lawmanlala:
Please what is the best affordable plugs for honda accord 2007. Is there a particular brand of plugs that works better with honda?

There is no one brand of plug for any car,Just buy original plugs