AUTO Veteran

The Motorist's Pride

500+
DIY Guides
75K
Community Members
1.2M+
Monthly Views

Interactive Diagrams

More Diagrams
Anti-Roll Bar (Stabilizer Bar)

Anti-Roll Bar (Stabilizer Bar)

A metal bar that connects the left and right wheels of the same axle to reduce body roll during cornering. When one wheel encounters a bump or the vehicle turns, the bar transfers some of the force to the opposite wheel, helping maintain vehicle stability and improving handling characteristics. It can be found on front suspension, rear suspension, or both.

DIY Tutorials

All Tutorials
Troubleshooting

What to Do If Your Car Only Starts When You Hit t…

Tapping the starter with a hammer or a wrench can sometimes make your car start because it can loos…

2 weeks, 2 days ago
4 Mins read
Car Maintenance Tips

Synthetic Oil Change Intervals: A Comprehensive G…

Synthetic oil is a type of engine oil that is made from chemically modified petroleum components an…

2 weeks, 2 days ago
4 Mins read
Car Maintenance Tips

Is it Okay to Put New Brake Pads on Old Rotors?

Brakes are one of the most important parts of your car. They help you slow down and stop safely whe…

2 weeks, 2 days ago
3 Mins read
Engines

Best Toyota Hiace Diesel Engine: 1KD vs 2KD

The Toyota Hiace offers different diesel engine options, depending on the market and the model year…

2 weeks, 2 days ago
3 Mins read
How To

How to Temporarily Fix a Car Water Pump Leak

A car water pump is a device that circulates coolant through the engine, radiator, and heater core.…

2 weeks, 2 days ago
3 Mins read
Explainer

Engine CC: What It Is and How to Calculate It

CC of an engine is a measure of the volume of the cylinders in the engine. It indicates how much ai…

2 weeks, 2 days ago
3 Mins read
Explainer

What Does CC Mean in Car Engines? A Complete Guid…

Have you ever wondered what the numbers on your car’s engine mean? You may have heard terms like 15…

2 weeks, 2 days ago
3 Mins read
Explainer

How Many Gears Are Best for Drag Racing?

Drag racing is a sport where two cars race each other on a straight track, usually a quarter-mile o…

2 weeks, 2 days ago
3 Mins read

Forum Q&A

All Questions

Yes, a faulty O2 sensor can cause this issue. It helps regulate the air-fuel mixture. If it's not working properly in cold conditions, the engine may run too rich or lean, resulting in rough idling and vibrations.

Jimna Mustafa
Replies (3)

Alvin Knex : If it’s the O2 sensor, why would it only happen when the engine is cold? Wouldn’t it affect performance all the time?

Jimna Mustafa : Good observation! Many O2 sensors only become active once the engine reaches operating temperature. When cold, the engine runs in 'open, loop' mode and ignores the O2 sensor, relying on preset fuel maps. If the sensor is failing, it might only cause issues once it starts influencing the fuel mixture, or if it sends incorrect signals during warm-up.

Alvin Knex : Turns out the upstream O2 sensor was failing. Swapped it out, and the violent shaking is gone. Thanks for pointing me in the right direction!

If it’s the O2 sensor, why would it only happen when the engine is cold? Wouldn’t it affect performance all the time?

Alvin Knex