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AutoCodes - Generic - P0234

P0234 Code - Turbocharger/Supercharger 'A' Overboost Condition

- Code Popularity: 115,497 Views
- Repair Importance Level: 3/3
- Repair Difficulty Level: 3/3
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By - Updated Jun 14, 2020
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|Code P0234 Possible Causes

  • Boost pressure sensor harness is open or shorted
  • Boost pressure sensor circuit poor electrical connection
  • Faulty boost pressure sensor
  • Faulty Turbo/Super Charger
  • Engine over temperature
  • Ignition misfire exceeds the calibrated threshold
  • Faulty Knock sensor (KS)

|How do I Fix the Code P0234?

Check the "Possible Causes" listed above. Visually inspect the related wiring harness and connectors. Check for damaged components and look for broken, bent, pushed out, or corroded connector's pins.

Does your Car have Safety Recalls? → Check here

|What is the Cost to Diagnose the Code P0234?

Labor: 1.0

The cost of diagnosing the P0234 code is 1.0 hour of labor. The auto repair labor rates vary by location, your vehicle's make and model, and even your engine type. Most auto repairs shops charge between $75 and $150 per hour.

|When is the Code P0234 Detected?

This diagnostic trouble code (DTC) P0234 will set if the boost pressure sensor signal is above the predicted range.

|What are Code P0234 Possible Symptoms?

  • Engine Light ON (or Service Engine Soon Warning Light)

|Code P0234 Description

The boost pressure sensor responds to pressure changes in the intake manifold. This pressure is created by the turbocharger and changes with accelerator pedal position (APP) and engine speed. The Engine Control Module (ECM) uses this information to assist in diagnosis of the barometric pressure (BARO) sensor and to provide engine overboost protection. The boost pressure sensor has a 5-volt reference circuit, a low reference circuit, and a signal circuit. The Engine Control Module (ECM) supplies 5 volts to the boost pressure sensor on the 5-volt reference 2 circuit, and provides a ground on a low reference circuit. The boost pressure sensor provides a signal to the ECM on a signal circuit relative to the pressure changes. The ECM monitors the boost pressure sensor signal for voltage outside of the normal range. The ECM calculates a predicted value for the boost pressure sensor. The ECM then compares the predicted value to the actual signal.
OBDII Code P0234 - Turbocharger/Supercharger 'A' Overboost Condition -
P0234 Code - Turbocharger/Supercharger 'A' Overboost Condition

|Need More Information on the P0234 Code?

Need more information on how to fix the P0234 code? Get Access to Factory Service Manuals

|Information for Specific Makes

|Need Help with the P0234 Code?

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|Code P0234 comments

Help us improve Leave a comment below or tell us if the information above helps you fix the code. What are the symptoms on your vehicle for the P0234 code? Have you replaced any parts?
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