P052C

Cold Start A Camshaft Position Timing Over-Advanced Bank 2

Variable valve timing Generic OBD-II High

What it means

P052C means that, during a cold start, the "A" (intake) camshaft on bank 2 is timed further advanced than the ECM commands. Variable valve timing phasers run on oil pressure, so this code often traces back to low or dirty oil or a sticking control solenoid — the usual symptoms are rough cold idle and hesitation until the engine warms up.

High

Can I keep driving? Drivable — most notable when cold, with rough idle or hesitation until the engine warms; fix it to protect cam-timing components.

Common symptoms

What you'll notice

Check-engine light on
Rough or unstable idle when the engine is cold
Hesitation or weak acceleration during warm-up
Rattle or noise from the timing area on a cold start

Common causes

Most likely first

Low or dirty engine oil (VVT phasers run on oil pressure)Likely
Faulty intake camshaft position actuator (OCV) solenoidCommon
Stuck or worn camshaft phaser on bank 2Common
OCV solenoid wiring open, shorted, or poorly connectedLess often
Worn timing chain/guides affecting cam timing; ECM fault (rare)Less often

How to diagnose & fix

Work through it in order

Read freeze-frame data and check engine oil level and condition first — change the oil and filter if it's low, old, or dirty.
Test the intake camshaft position actuator solenoid's resistance (roughly 7 ohms is typical) and inspect its wiring and connector.
Clean or replace the OCV solenoid if it's sticking or out of spec.
If oil and the solenoid check out, inspect the phaser and timing chain for wear. Clear and re-test.

FAQ

Quick answers

Is it safe to drive with P052C?+

Short-term yes, but rough cold running and a cam-timing fault shouldn't be ignored. Because low or dirty oil is a common cause, check the oil promptly and repair the phaser/solenoid before it worsens.

Can I just clear P052C?+

It returns on the next cold start if the oil, solenoid, or phaser problem remains. Diagnose the cause before clearing.

Related codes

Often seen with P052C

P052DCold Start A Camshaft Position Timing Over P052ACold Start A Camshaft Position Timing Over P0021A Camshaft Position - Timing Over-Advanced P0011A Camshaft Position - Timing Over-Advanced

Read & clear P052C yourself

Scan your car, confirm the code, and clear it once it's fixed — with OBD DashX on your phone.

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✓ Verified name — SAE J2012 / ISO 15031-6Guidance reviewed by OBD DashX