P03D1

Symptoms

• Check Engine light on
• Slight engine instability
• Slight reduction in power at high loads
• Possible periodic misfires in cylinder 7
• Deteriorating fuel economy

Causes

• Open circuit or short circuit in the wiring of the pressure sensor of cylinder 7
• Damaged or corroded sensor connector
• Failure of the pressure sensor itself
• Mechanical damage to the wiring harness
• ECU malfunction (extremely rare)

How to Fix

1. Find the cylinder 7 pressure sensor connector according to the electrical diagram
2. Carefully inspect the connector - the presence of corrosion, deformation of the clamps, cleanliness of the contacts
3. Check the wiring from the connector to the ECU for open circuit and short circuit (with a multimeter)
4. Measure the sensor supply voltage with the ignition on
5. If the circuit is working, replace the pressure sensor of cylinder 7
6. Reset codes, start engine and verify resolution

Related codes

Error P03D1 by Vehicle Brand