P34AA code meaning
A Camshaft Position Actuator Temperature Sensor Circuit Low Bank 2
Powertrain system Generic code P34xx codes Check engine light
What P34AA means
P34AA reports that the temperature sensor of the bank 2 intake cam actuator signals a voltage below its permitted range. Whether that equals a hot reading depends on the sensor design, which no public source names; with the common NTC thermistor it would mimic overheating, and the controller could limit the actuator current or stop phasing on that bank. In practice a signal wire grounded against the cylinder head, cables pinched during earlier engine work or a shorted sensor are the usual suspects. NTN-SNR lists P34AA as too small a signal of the inlet temperature sensor on the second bank; a manufacturer text is not public. Compare bank 1 (P34A6) and the high code P34AB.
P34AA 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 P34AA
- Check engine light on
- Intake phasing on bank 2 suspended, slightly less power
Common causes of P34AA
- Most likelySignal wire grounded against the cylinder head
- PossibleCables pinched during earlier engine work
- PossibleSensor shorted internally
Check the most likely causes first. Replacing parts by guesswork is the most expensive way to clear a code.
Parts involved
Cam actuator a temp sensor b2Sensor wiring
What each part of P34AA means
| P | Powertrain system: engine, fuel system, ignition, emissions and transmission. |
| 3 | Mixed range: generic and manufacturer-specific codes. |
| 4 | Area: auxiliary emission controls (catalytic converter, EGR, EVAP). |
| AA | The exact fault in that area. |
What to do next
- Note P34AA 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 P34AA
What does P34AA mean?
P34AA means "A Camshaft Position Actuator Temperature Sensor Circuit Low Bank 2". P34AA reports that the temperature sensor of the bank 2 intake cam actuator signals a voltage below its permitted range. It is a generic code, so it means the same on every make.
Is it safe to drive with P34AA?
Drive gently and only to a workshop. With P34AA the car can go into limp mode (reduced power) to protect itself.
Will P34AA fail an emissions test?
Yes, it can. P34AA 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 P34AA 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 P34AA clear itself after the repair?
Clear the code with a scanner after the repair. If the fault is fixed, it does not come back.