P054B

Cold Start B Camshaft Position Timing Over-Retarded Bank 1

Camshaft / valve timing Generic OBD-II Medium

What it means

P054B means that during a cold start the B (exhaust) camshaft on bank 1 is timed too far retarded — the variable valve timing system can't reach the position the computer commands while the engine and oil are still cold. The engine usually still runs, but you may notice a rough cold idle, weak cold performance, and higher emissions until it warms up.

Medium

Can I keep driving? Usually safe to drive — the engine still runs, but you may get a rough cold idle, weak cold performance, and higher emissions until it's fixed; it can also point to low or dirty oil.

Common symptoms

What you'll notice

Rough or unstable idle, especially on a cold start
Hesitation or weak acceleration when the engine is cold
Check-engine light on
Increased exhaust smoke or emissions on some engines

Common causes

Most likely first

Low engine oil level or old/dirty oil (variable valve timing runs on oil pressure)Likely
Faulty camshaft oil-control valve (VVT solenoid) for the B/exhaust camshaftCommon
Open, shorted, or corroded wiring/connector at the camshaft solenoidCommon
Stretched timing chain or worn camshaft phaser (mechanical timing off)Less often
Faulty engine control module (ECM) — rareLess often

How to diagnose & fix

Work through it in order

Read freeze-frame data and confirm it sets during a cold start.
Check oil level and condition; change the oil and filter if it's low, old, or dirty — the most common fix.
Test the camshaft oil-control valve/solenoid resistance (roughly 6.9-7.9 ohms) and check its screen for debris.
Inspect the solenoid connector and wiring for opens, shorts, and corrosion.
If timing is mechanically off, inspect the chain, tensioner, and phaser. Clear and re-test with a cold start.

FAQ

Quick answers

Is it safe to drive with P054B?+

Generally yes — the engine runs, but fix it to restore cold performance and rule out an oil issue that could cause worse damage.

Can I just clear P054B?+

It will clear, but it comes back on the next cold start until the cause — often oil condition or the cam solenoid — is repaired.

Related codes

Often seen with P054B

P0015B Camshaft Position - Timing Over-Retarded P0014B Camshaft Position - Timing Over-Advanced P0016Crankshaft Position - Camshaft Position Co

Read & clear P054B 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