This is considered a in the DV6 engine family (used in Peugeot 207, 208, 308, 2008, and Partner models).
Inspect the pins on the throttle position sensor (TPS) for water ingress or corrosion, which is a common issue in older models like the 306. Peugeot 306 Owners Club
Because it is mechanical, tuning the XUD is straightforward. A "screwdriver and 13mm spanner" tune (adjusting the fuel pump) can give the D Turbo a significant boost in performance. 3. Handling: The Best in Its Class p306d peugeot
Cracked plastic intake pipes, unseated gaskets, or split vacuum lines allow unmetered air to breach the engine. This extra air bypasses the throttle body entirely, raising the internal manifold pressure and triggering the error. Step-by-Step Diagnostic and Repair Protocol
Once the faulty hardware (typically the EVAP valve or fouled MAP sensor) is cleaned or replaced, use your diagnostic tool to clear the P306D DTC. If your scanner supports it, run a . This forces the ECU to re-map the physical closed and open positions of the air mixer to guarantee system coherence. Affected Models This is considered a in the DV6 engine
On many 1.6 PureTech engines, this valve is located under the air filter box at the rear of the engine, often protruding from under the inlet manifold on the gearbox side. V759557380cap V 759557380 or similar PSA part numbers. 2. Check the Solenoid Valve
The code is a "manufacturer-specific" code, meaning its meaning can change depending on the brand of your vehicle. It is not a standardized OBD-II code used across all makes. For Peugeot, it is most accurately described in a French forum for a Peugeot 3008 PHEV 225 , which states the code corresponds to "an adaptive recalibration of the throttle body (butterfly valve) being out of tolerance" (un adaptatif de recalage du boitier papillon hors tolérance). A "screwdriver and 13mm spanner" tune (adjusting the
A more powerful "sporty" diesel option that featured a turbocharger, increasing output to 90 hp and 196 Nm of torque. Technical comparisons of these engines can be found on Ultimate Specs .
If the problem continues, the MAP sensor (which measures intake pressure) and MAF sensor (which measures air flow) are prime suspects. Using a diagnostic scan tool to view live data from these sensors can often reveal if one is reading incorrectly.
: Leaks after the mass air flow (MAF) sensor introduce unmetered air, confusing the ECU and often triggering both P306D and a lean mixture code like P0171. Faulty PCV valves, cracked intake hoses, leaking intake manifold gaskets, and a damaged EVAP purge valve can also disrupt the air-fuel ratio.
After cleaning or replacing any components involved in the air induction pathway (like the throttle body or EVAP valve), the ECU must relearn its baseline values. Use your diagnostic tool to clear the code and perform a . Drive the vehicle under varied load conditions for 15–20 minutes to allow the computer to re-calibrate its intake pressure expectations.