DTC P0234: Turbocharger/Supercharger A OVERBOOST Condition
WARNING: This page does not describe the selected car, but rather 32 other vehicles, including the 2011 Mercury Milan, 2011 Mercury Mariner, 2011 Mercury Grand Marquis, 2011 Lincoln Town Car, and 2011 Lincoln Navigator L. However, it is still accessible from the selected car via links, so may be relevant.
P0234 - TURBOCHARGER/SUPERCHARGER A OVERBOOST CONDITION
| Description: | The powertrain control module (PCM) continuously monitors the turbocharger system for an overboost condition. The PCM checks for a maximum throttle intake pressure (TIP) PID reading during engine operation, which indicates an overboost condition. This DTC sets when the PCM detects that the actual throttle intake pressure is greater than the desired throttle intake pressure by 27.6 kPa (4 psi) or more for 5 seconds. | ||
| Possible Causes: |
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| Diagnostic Aids: | Check tubing for obstructions, cracks and incorrect fitting connections. Check the turbocharger wastegate regulating valve solenoid for correct operation. |
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| Application | Key On Engine Off | Key On Engine Running | Continuous Memory |
| All | GO to PINPOINT TEST HN . | ||