Easy one-page printout for the garage or repair shop
This summary uses the existing diagnostic information shown in full below.
This code means that a sensor in the car that checks the air pressure in the engine is not working right. It's like if you had a balloon and the sensor is supposed to tell you how full it is, but it's giving a wrong reading.
The P1198 code indicates that the differential pressure sensor located in the intake manifold of the engine is reporting a lower than expected voltage. This sensor helps monitor the pressure difference in the intake manifold to ensure proper engine operation.
The differential pressure sensor is responsible for measuring the pressure difference across the intake manifold. When the sensor reports a voltage that is lower than the predetermined threshold, the engine control module (ECM) triggers the P1198 code. This could be due to a malfunctioning sensor, wiring issues, or a problem with the ECM itself.
• Check Engine Light illuminated
• Poor engine performance
• Decreased fuel efficiency
• Faulty differential pressure sensor
• Wiring issues such as short circuits or open circuits
• Faulty engine control module (ECM)
Differential Pressure Sensor: A sensor that measures the difference in pressure across two points in the engine.
Intake Manifold: Part of the engine that distributes air to the cylinders.
• Use an OBD-II scanner to confirm the code.
• Inspect the wiring and connectors for damage or corrosion.
• Test the differential pressure sensor for proper operation.
• Replace the faulty differential pressure sensor.
• Repair or replace damaged wiring or connectors.
• Reprogram or replace the ECM if necessary.
• OBD-II scanner
• Multimeter
• Basic hand tools
$150 - $400
Moderate
• Volkswagen Jetta
• Audi A4
• Ford Focus
• Regular maintenance checks
• Ensure clean and secure electrical connections
• Use quality fuel to prevent sensor contamination
Sensor Issue
• Have the vehicle inspected by a professional mechanic.
• Avoid driving the vehicle until the issue is resolved to prevent further damage.
Check with your vehicle manufacturer for warranty coverage on sensors and related components.
This code has been more prevalent in vehicles with higher mileage due to sensor wear and tear.
Moderate – It should be addressed soon to prevent potential engine performance issues.
Driving with a faulty pressure sensor can lead to reduced engine performance and increased emissions.
• Engine running at operating temperature
• Vehicle in idle or driving conditions
The differential pressure sensor is located on the intake manifold, typically near the throttle body.
Q: What happens if I ignore this code?
A: Ignoring this code can lead to poor engine performance and decreased fuel efficiency.
Q: Can I drive my car with this code?
A: It's not recommended to drive for extended periods with this code active, as it can cause further damage.
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