P052B

Cold Start A Camshaft Position Timing Over-Retarded Bank 1

Q: Is it safe to drive with P052B?

Short-term light driving is usually okay, but the engine may idle roughly and run poorly when cold. Check the oil right away, since low or dirty oil is a frequent cause.

Q: Can I just clear P052B?

It will return on the next cold start until the oil, VVT solenoid, or wiring is addressed. Fresh oil sometimes clears it if a dirty oil passage was the cause.

Variable valve timing Generic OBD-II High

What it means

P052B means the intake camshaft timing on bank 1 was more retarded than commanded during a cold start. The variable valve timing (VVT) system uses oil pressure to adjust cam timing; when it lags on a cold start, the ECM sets this code. The most common causes are low or dirty oil and a faulty VVT solenoid. The engine still starts, but rough cold running warrants a prompt oil check and repair.

High

Can I keep driving? Usually yes — the engine starts and runs, but expect rough idle and weak acceleration when cold. Because low or dirty oil is a common cause, check your oil and don't delay the repair.

Real-world scan data

Seen in

scans in the past year

Found in

<0.1%

of scans

<0.1%

of scans that found faults

Figures reflect only diagnostic scans recorded through our own apps and tools. Cars are typically scanned because a symptom or warning light prompted it, so these counts describe our scan records — not the incidence of faults in any model, and not the quality, reliability, or safety of any vehicle. No comparison between manufacturers or models is implied. All trademarks belong to their respective owners; no affiliation or endorsement is implied.

Common symptoms

What you'll notice

Check-engine light on
Rough or unstable idle when cold
Poor acceleration or weak performance during warm-up
Occasional excessive exhaust smoke on cold start

Common causes

Most likely first

Low engine oil levelLikely
Dirty or degraded oil clogging the VVT actuator/oil control valveCommon
Faulty intake camshaft position actuator (VVT) solenoidCommon
Damaged wiring or poor connection at the actuator solenoidLess often
Stretched timing chain or worn phaserLess often
ECM fault (rare)Less often

How to diagnose & fix

Work through it in order

Read freeze-frame data and confirm the fault sets during cold starts.
Check the engine oil level and condition first — top up or change dirty oil, which commonly causes this.
Test the oil control valve (OCV)/actuator solenoid resistance against spec (roughly 6.9–7.9 ohms on many engines).
Inspect the solenoid wiring and connector for damage or corrosion.
Replace the actuator solenoid or address chain/phaser wear if needed, then clear and re-test.

FAQ

Quick answers

Is it safe to drive with P052B?+

Short-term light driving is usually okay, but the engine may idle roughly and run poorly when cold. Check the oil right away, since low or dirty oil is a frequent cause.

Can I just clear P052B?+

It will return on the next cold start until the oil, VVT solenoid, or wiring is addressed. Fresh oil sometimes clears it if a dirty oil passage was the cause.

Read & clear P052B yourself

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

▶ Get it on Google Play

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