P000B "B" Camshaft Position Slow Response (Bank 1)
P000B is a generic OBD2 powertrain code. It means “"B" Camshaft Position Slow Response (Bank 1)” — the same on every make and model, because the definition comes from the SAE J2012 standard rather than from the carmaker.
Ask the AI about P000B on your car- System
- Powertrain (P)
- Code type
- Generic (SAE)
- Range
- P00xx
What the wording tells you
“Slow response” means the sensor still works but reacts to changes too slowly — typical of an ageing or contaminated sensor.
Bank 1: engines with two rows of cylinders — V6, V8, boxer — have two banks. Bank 1 is the side that holds cylinder 1, bank 2 the other side; an inline engine has only bank 1.
Camshaft “B”: by the SAE convention “A” is the intake (or left/front) camshaft and “B” the exhaust (or right/rear) one — here, the exhaust camshaft.
Can I keep driving with P000B?
The rule of thumb for this area (fuel & air metering and emission controls): Most codes here leave the car drivable, sometimes with reduced power. Codes that put the engine into limp mode (throttle, boost control) and diesel exhaust-treatment codes deserve a prompt repair — on many diesels an AdBlue fault ends in a countdown after which the engine won’t restart.
How P000B breaks down
Powertrain. Engine, transmission, fuel and emissions — the codes behind the check engine lamp.
Generic code: defined by SAE, the same on every make.
Fuel & air metering and emission controls.
The specific fault within this range.
Where to look: Fuel & air metering and emission controls
Codes in these ranges cover the parts that decide how much air and fuel reach the engine and how the exhaust is treated on the way out: variable valve timing, oxygen-sensor heaters, turbo boost control, the electronic throttle and accelerator pedal, intake runners, NOx sensors and — on diesels — the particulate filter and the AdBlue (SCR) system.
Typical causes in this area
- Wiring and connectors — most codes here are electrical (“circuit”, “low”, “high”)
- A failed sensor or actuator
- Dirt and carbon: sticking throttles, EGR valves and intake runners
- Engine oil that is low or old, which variable valve timing depends on
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Read and clear P000B on your iPhone
Brimly reads stored, pending and permanent codes through a Bluetooth LE or Wi-Fi OBD2 adapter, explains each one offline from the same 2,693-code dictionary as this page, and clears them once the fault is fixed — each clear goes into the car’s service history with the codes it removed. OBD diagnostics are part of Brimly Forever, a one-time purchase; the PRO assistant explains a code for your exact car.
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Frequently asked
What does P000B mean?
P000B is a generic OBD2 powertrain code. It means “"B" Camshaft Position Slow Response (Bank 1)” — the same on every make and model, because the definition comes from the SAE J2012 standard rather than from the carmaker.
Can I drive with P000B?
The rule of thumb for this area (fuel & air metering and emission controls): Most codes here leave the car drivable, sometimes with reduced power. Codes that put the engine into limp mode (throttle, boost control) and diesel exhaust-treatment codes deserve a prompt repair — on many diesels an AdBlue fault ends in a countdown after which the engine won’t restart.
What causes P000B?
“Slow response” means the sensor still works but reacts to changes too slowly — typical of an ageing or contaminated sensor. Typical causes in this area: Wiring and connectors — most codes here are electrical (“circuit”, “low”, “high”); A failed sensor or actuator; Dirt and carbon: sticking throttles, EGR valves and intake runners; Engine oil that is low or old, which variable valve timing depends on.
How do I clear P000B?
Fix the cause first, then clear it with any OBD2 scanner or app. Once the fault is gone the car also clears it on its own: the check engine lamp goes off after the self-test passes on three drive cycles in a row, and the stored code ages out after about 40 warm-ups. Clearing without a repair only hides it for a while — and resets the readiness monitors an emissions inspection looks at.
Is P000B the same on every car?
Yes. P000B is a generic SAE J2012 code, so its definition is identical on every make and model. What differs is the cause behind it and the repair procedure, which depend on the engine — that’s why the assistant on this page asks for your car.
Guides
Definitions: the generic SAE J2012 codes from Brimly’s offline dictionary (data version 2026.09). Causes and advice are general guidance for all makes — the service information for your car has the last word.