P2B41 code meaning
A Camshaft Position Actuator Position Sensor B Circuit Low Bank 1
Powertrain system Generic code P2Bxx codes Check engine light
What P2B41 means
P2B41 reports a voltage below the permitted window from sensor B, which watches the intake actuator of bank 1. That usually points to a grounded signal line or a sensor that has failed internally. Mercedes describes the matching low fault on the exhaust side (P34BE, sensor of CAMTRONIC solenoid 1) literally as a short to ground, which shows how the family is meant; a public text on P2B41 itself is not known. GM's L3B, used here only as a comparison, sets its low codes on the sliding cam (P2C07) at 0.5 Ω or less between signal and ground while the driver is on, after 4 of 5 samples with more than 11 V supply. Chafed harness sections over the cylinder head deserve the first look. High is P2B42.
P2B41 at a glance
- Check engine lightYes, usually on
- Emissions testCan fail
- Limp modePossible
- Repair difficultyMedium, DIY possible
- Typical labor0.5 to 3 hours
- Clears after repairWhen cleared with a scanner
Symptoms of P2B41
- Check engine light on
- Cam lift switching disabled
- Possibly further codes from sensors on the same supply
Common causes of P2B41
- Most likelySignal wire shorted to ground (chafed harness)
- PossibleSensor shorted internally
- PossibleSensor supply interrupted
Check the most likely causes first. Replacing parts by guesswork is the most expensive way to clear a code.
Parts involved
A camshaft position actuator pos sensor b b1Wiring harnessECM
What each part of P2B41 means
| P | Powertrain system: engine, fuel system, ignition, emissions and transmission. |
| 2 | Generic code (second SAE range): it means the same on every make. |
| B | Area: hybrid propulsion. |
| 41 | The exact fault in that area. |
What to do next
- Note P2B41 and any other codes stored with it: several codes together often point to one cause.
- Check for loose connectors and damaged wiring around the parts the code names.
- Check open recalls for your car: some faults are fixed for free by the dealer. Enter your VIN.
- Clear the code only after the repair. If it comes back, the fault is still there.
Buying a used car? Scan it for stored codes before you pay. A recently cleared memory can hide a problem.
Questions about P2B41
What does P2B41 mean?
P2B41 means "A Camshaft Position Actuator Position Sensor B Circuit Low Bank 1". P2B41 reports a voltage below the permitted window from sensor B, which watches the intake actuator of bank 1. It is a generic code, so it means the same on every make.
Is it safe to drive with P2B41?
Drive gently and only to a workshop. With P2B41 the car can go into limp mode (reduced power) to protect itself.
Will P2B41 fail an emissions test?
Yes, it can. P2B41 is emissions-related, so most inspection programs fail a car while it is stored or while the check engine light is on.
How hard is P2B41 to fix?
Difficulty: medium. A typical repair takes 0.5 to 3 hours of work. A careful DIY repair is possible with basic tools and a scanner.
Will P2B41 clear itself after the repair?
Clear the code with a scanner after the repair. If the fault is fixed, it does not come back.