P0398

Cylinder 1 Pressure Sensor Circuit High

Severity

⚠️ Medium

Can you drive?

Limited driving only, diagnose soon

Approx. repair cost

$56–167 (est.)

Symptoms

Unstable engine operation
Power reduction
Increased fuel consumption
Check Engine Light Illuminates

Causes

Malfunction of the pressure sensor in cylinder 1
Open or short circuit in wiring harness
Problems with contacts in connectors
ECU malfunction

How to Fix

Check the integrity of the sensor wiring harness
Check contacts in connectors
Test the pressure sensor with a multimeter
Replace sensor if necessary
Check the operation of the computer

Related codes

P0301 P0302 P0390 P0394