P34B7B Camshaft Position Actuator Temperature Sensor Circuit High Bank 1
- Generic OBD-II code · Powertrain
- Turns on the check-engine light
- Matters for the ITP
- Can trigger limp mode
- How the car detects it
- P34B7 sets when the heat reading delivered by exhaust actuator B, bank 1, sits above its upper limit. Electrically this points to an open signal line, a detached sensor ground or contact with battery or reference voltage; with a negative-coefficient element the module would see an implausibly cold actuator. A cold reading harms nothing by itself, but it robs the controller of its heat protection – in Aisin's design the reading decides when the holding current at the end stop must be cut back – so the module will typically stop relying on electric phasing. NTN-SNR describes P34B7 as an excessive outlet-side signal. No manufacturer text on this code is published. CARB obliges the OBD system to recognise such open or shorted circuits. Low counterpart: P34B6.
- What you may notice
- Malfunction indicator lamp lit
- Exhaust cam on bank 1 held in its default position
- Likely causes
- LikelySignal line or sensor ground interrupted, plug corroded
- PossibleSignal line shorted to a supply wire
- PossibleSensor element open inside the actuator
- Inspection (ITP)
- Matters for the ITP. While the check-engine light is on, the car fails the emissions check.
- Repair
- Medium · Often possible to do yourself.Typical cost: €50 – €800
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.