P03AC

Cylinder 3 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 comes on

Causes

Short circuit to power in the sensor wiring harness
Malfunction of the cylinder pressure sensor
Problems with the engine control unit (ECU)
Damage or corrosion of contacts in connectors

How to Fix

Check the integrity of the sensor wiring harness
Check the voltage and resistance of the sensor
Inspect connectors for damage or corrosion
If necessary, replace the cylinder pressure sensor
Check ECU operation

Related codes

P03A9 P03AA P03AB P03AD