P03EE: A Camshaft Profile Actuator C Control Circuit High Bank 1

With a sliding camshaft, the intake camshaft (camshaft A) carries movable cam pieces with several lift profiles; solenoid actuators shoot a pin into a groove in the piece and shift it axially. Actuator C is the third of these actuators – not a profile position. The only known user is GM's 2.7-litre turbo four (L3B, three-step sliding cam, from model year 2019). P03EE means the control circuit is shorted to the supply voltage: GM checks with the driver off and sets the code at 0.5 Ω or less between signal and supply (4 of 5 samples, above 11 V, MIL on the first trip). The actuator can then not shift its cam piece, and lift switching and cylinder deactivation are blocked.

Medium severity. Can I keep driving?Drive little and gently. If you hear timing chain noise or the oil light comes on, shut off the engine.

Bank 1 is the side of the engine with cylinder 1. Inline engines only have this bank.

Symptoms

Check engine light on
Lift switching and cylinder deactivation blocked, higher consumption
Possibly rough running if a cam piece stays in the wrong position

Most likely causes

Control wire shorted to battery voltage
Short between supply and control pin in the connector (water, corrosion)
Internal short in the actuator
Driver in the engine module

What to check, in order

Start with the simplest. You can tick off each step.

Check the oil level and condition before anything else
Check the sensor's ground and make sure the signal wire is not receiving voltage from another circuit.
Check the solenoid valve's connector
Compare commanded and actual angles in live data
Test the solenoid valve and its filter, if it has one
Check the engine timing if there is chain noise

Good to know

Repair difficulty: medium
It can trigger limp mode.
It affects emissions.

What each character of P03EE means

P: Powertrain: engine and transmission
0: Generic code: same on every make
3: Ignition and misfires
EE: Specific fault in that system

Frequently asked questions

Can I keep driving with code P03EE?

Drive little and gently. If you hear timing chain noise or the oil light comes on, shut off the engine.

What causes code P03EE?

The most common causes are: control wire shorted to battery voltage; short between supply and control pin in the connector (water, corrosion); internal short in the actuator.

Related codes

Sources

Values and procedures vary by manufacturer. If it affects brakes, steering, fuel or high voltage, see a professional. Updated: 2026-11-04. How we build these pages.