The P0221 trouble code indicates a problem with the Throttle Position Sensor (TPS) circuit range or performance.

Modern vehicles use electronic throttle control systems to regulate engine airflow. The throttle position sensor tells the engine control module (ECM) how far the throttle plate is open.

When the ECM detects that the TPS signal is outside the expected operating range or behaving inconsistently, it stores the code:

P0221 — Throttle Position Sensor Range/Performance Problem.

If ignored, this issue can lead to poor throttle response, reduced engine power, or limp mode activation.

The P0122 trouble code indicates that the engine control module (ECM) has detected a low voltage signal from the Throttle Position Sensor (TPS).

The TPS monitors the position of the throttle plate and tells the engine computer how much the driver is pressing the accelerator.

When the signal voltage drops below the expected range, the ECU stores the code:

P0122 — Throttle Position Sensor Circuit Low Input.

This issue can affect engine performance, throttle response, and acceleration.

The P2196 trouble code indicates that the upstream oxygen sensor on Bank 1 (Sensor 1) is reporting a rich air-fuel mixture for too long.

In simple terms, the engine control module (ECM) believes the engine is running too rich, meaning there is too much fuel and not enough air in the mixture.

This code appears when the oxygen sensor signal remains stuck in the rich range and does not fluctuate normally.

The P0135 trouble code indicates a malfunction in the oxygen sensor heater circuit for Bank 1 Sensor 1.

Modern vehicles use heated oxygen sensors (HO2S) to quickly reach operating temperature after startup. The heater element inside the sensor helps it begin working within seconds.

The P0500 trouble code indicates a problem with the Vehicle Speed Sensor (VSS) or the signal it sends to the engine computer.

The vehicle speed sensor measures how fast the car is moving and sends this information to several systems, including:

✔ Engine control module (ECM)
✔ Transmission control module (TCM)
✔ ABS system
✔ Speedometer and odometer

The P0011 trouble code is a common Check Engine Light code found in many modern vehicles equipped with Variable Valve Timing (VVT) systems.

When code P0011 — Camshaft Position Timing Over-Advanced (Bank 1) appears, it means the engine computer has detected that the intake camshaft timing is more advanced than expected.

Your car’s engine is the heart of the vehicle. When it starts failing, repairs can become extremely expensive.

Major engine repairs can cost anywhere from $2,000 to $8,000, and in some cases replacing the engine may cost even more.

The good news is that engines usually show clear warning signs before catastrophic failure.

Recognizing these symptoms early can help you prevent severe damage and avoid being stranded on the road.

Below are 7 warning signs your engine may be close to failing.

Seeing the Check Engine Light on your dashboard can be stressful.

But not every diagnostic trouble code (OBD2 code) means you must stop driving immediately.
Some codes indicate minor issues that usually allow you to drive the vehicle safely for a short period until you schedule repairs.

However, even these codes should not be ignored for long periods, as small problems can eventually turn into expensive repairs.

Below are 10 common Check Engine codes that are usually safe to drive with temporarily.

Not all Check Engine Light warnings are equally serious.

Some codes indicate minor issues like a loose gas cap, while others warn about problems that can stop your engine suddenly or leave you stranded on the road.

Modern vehicles store OBD2 diagnostic trouble codes (DTCs) that help identify the exact issue.

If you see one of the codes below, it’s best to diagnose and repair the problem as soon as possible.

These 7 OBD codes are known for causing sudden breakdowns.

The Check Engine Light is one of the most misunderstood warning lights in a vehicle.

Sometimes it appears due to a minor issue like a loose gas cap, but in other cases it can signal serious engine damage or expensive repairs.

Modern vehicles store diagnostic trouble codes (OBD2 codes) that help identify the problem.