Car Engine Sensor Price

Oxygen Sensor

The oxygen sensor is responsible for measuring the amount of oxygen in the exhaust gas. This information is used by the engine control unit (ECU) to adjust the air-fuel ratio.

• Average price: $100-$200
• Replacement interval: 90,000-120,000 miles
• Signs of a bad oxygen sensor: Increased fuel consumption, poor engine performance, illuminated check engine light

Mass Airflow Sensor

The mass airflow sensor measures the amount of air flowing into the engine. This information is used by the ECU to calculate the amount of fuel to inject.

• Average price: $150-$300
• Replacement interval: 100,000-150,000 miles
• Signs of a bad mass airflow sensor: Poor engine performance, hesitation upon acceleration, black smoke from exhaust

Throttle Position Sensor

The throttle position sensor measures the position of the throttle plate. This information is used by the ECU to control the amount of air flowing into the engine.

• Average price: $50-$150
• Replacement interval: 100,000-150,000 miles
• Signs of a bad throttle position sensor: Poor engine performance, stalling, illuminated check engine light

Camshaft Position Sensor

The camshaft position sensor measures the position of the camshaft. This information is used by the ECU to control the timing of the engine valves.

• Average price: $100-$200
• Replacement interval: 100,000-150,000 miles
• Signs of a bad camshaft position sensor: Poor engine performance, stalling, illuminated check engine light

Crankshaft Position Sensor

The crankshaft position sensor measures the position of the crankshaft. This information is used by the ECU to control the timing of the engine ignition.

• Average price: $100-$200
• Replacement interval: 100,000-150,000 miles
• Signs of a bad crankshaft position sensor: No spark, no start, illuminated check engine light

Knock Sensor

The knock sensor detects the presence of engine knocking. This information is used by the ECU to adjust the engine timing to prevent engine damage.

• Average price: $100-$200
• Replacement interval: 100,000-150,000 miles
• Signs of a bad knock sensor: Engine knocking, poor engine performance, illuminated check engine light

Coolant Temperature Sensor

The coolant temperature sensor measures the temperature of the engine coolant. This information is used by the ECU to control the engine cooling system.

• Average price: $50-$100
• Replacement interval: 100,000-150,000 miles
• Signs of a bad coolant temperature sensor: Overheating engine, poor engine performance, illuminated check engine light

Intake Air Temperature Sensor

The intake air temperature sensor measures the temperature of the air entering the engine. This information is used by the ECU to adjust the air-fuel ratio.

• Average price: $50-$100
• Replacement interval: 100,000-150,000 miles
• Signs of a bad intake air temperature sensor: Poor engine performance, hesitation upon acceleration, illuminated check engine light

Barometric Pressure Sensor

The barometric pressure sensor measures the atmospheric pressure. This information is used by the ECU to adjust the engine timing and air-fuel ratio.

• Average price: $50-$100
• Replacement interval: 100,000-150,000 miles
• Signs of a bad barometric pressure sensor: Poor engine performance, hesitation upon acceleration, illuminated check engine light

Manifold Absolute Pressure Sensor

The manifold absolute pressure sensor measures the absolute pressure in the intake manifold. This information is used by the ECU to adjust the engine timing and air-fuel ratio.

• Average price: $100-$200
• Replacement interval: 100,000-150,000 miles
• Signs of a bad manifold absolute pressure sensor: Poor engine performance, hesitation upon acceleration, illuminated check engine light

Evaporative Emission Control System Purge Valve

The evaporative emission control system purge valve controls the flow of fuel vapor from the fuel tank to the engine. This system helps to reduce emissions.

• Average price: $50-$100
• Replacement interval: 100,000-150,000 miles
• Signs of a bad evaporative emission control system purge valve: Fuel smell, poor engine performance, illuminated check engine light

Exhaust Gas Recirculation Valve

The exhaust gas recirculation valve controls the flow of exhaust gas back into the engine. This system helps to reduce emissions.

• Average price: $100-$200
• Replacement interval: 100,000-150,000 miles
• Signs of a bad exhaust gas recirculation valve: Poor engine performance, hesitation upon acceleration, illuminated check engine light

Variable Valve Timing Solenoid

The variable valve timing solenoid controls the timing of the engine valves. This system helps to improve engine performance and fuel economy.

• Average price: $100-$200
• Replacement interval: 100,000-150,000 miles
• Signs of a bad variable valve timing solenoid: Poor engine performance, hesitation upon acceleration, illuminated check engine light