P34AB code meaning
A Camshaft Position Actuator Temperature Sensor Circuit High Bank 2
Powertrain system Generic code P34xx codes Check engine light
What P34AB means
P34AB stands for a voltage above the upper limit at the temperature sensor of intake cam actuator A, bank 2. An interrupted signal or ground line is the classic cause, as is a short to a higher voltage; a plug pushed off during a service visit often explains it. Because the actuator motor warms up under load, the controller depends on this value – the Aisin patent lowers the current step by step while a high temperature persists – and without it the bank 2 phaser is usually held back. NTN-SNR names the code for the inlet side of the second bank; no carmaker publishes it. The bank 1 equivalent is P34A7, the low code P34AA.
P34AB 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 P34AB
- Check engine light on
- Intake phasing on bank 2 held back
Common causes of P34AB
- Most likelyPlug at the actuator off or not latched after service
- PossibleSignal or ground wire interrupted
- Less likelySignal shorted to a higher voltage
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 P34AB 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). |
| AB | The exact fault in that area. |
What to do next
- Note P34AB 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 P34AB
What does P34AB mean?
P34AB means "A Camshaft Position Actuator Temperature Sensor Circuit High Bank 2". P34AB stands for a voltage above the upper limit at the temperature sensor of intake cam actuator A, bank 2. It is a generic code, so it means the same on every make.
Is it safe to drive with P34AB?
Drive gently and only to a workshop. With P34AB the car can go into limp mode (reduced power) to protect itself.
Will P34AB fail an emissions test?
Yes, it can. P34AB 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 P34AB 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 P34AB clear itself after the repair?
Clear the code with a scanner after the repair. If the fault is fixed, it does not come back.