What is the code P0236 for turbocharger boost sensor A?
P0236 is a diagnostic trouble code that points to the turbocharger boost sensor A circuit reporting abnormally high readings. In practical terms, it means the engine control unit senses boost pressure higher than what the system should produce, triggering a fault code and potentially limiting performance.
What P0236 Means
The code P0236 stands for Turbocharger Boost Sensor A Circuit Range/Performance (High). The "A" designation refers to the primary boost sensor used by the engine’s management system. When the ECU detects boost readings outside the expected range—specifically higher than commanded or plausible for the given engine load—it sets this code to alert the driver and technicians.
How boost sensors work
Common Causes
Before you start diagnosing, understand the likely culprits behind a P0236. The following list covers the main categories.
- Boost sensor A failure or drift, causing the sensor to read higher than actual pressure.
- Wiring or connector problems—damaged wires, loose pins, corrosion, or a poor ground or 5V reference.
- Vacuum or boost leaks in the intake, intercooler, or piping that distort readings or confuse the ECU.
- Faulty or sticking turbo wastegate/boost control solenoid leading to excessive actual boost.
- Faulty calibration or failure of the MAP/boost pressure sensor circuit or an ECU fault.
- Leaks in PCV or charging system that affect pressure dynamics.
Concluding note: A high-reading signal can stem from a sensor fault, a wiring issue, or a problem in the boost control path.
Symptoms to Watch For
Owners and technicians should look for a cluster of symptoms that often accompanies P0236, helping prioritize inspection.
- Check Engine Light or service indicator illuminated.
- Unusually high boost readings reported by a scan tool or data stream.
- Loss of power, reduced performance, or entry into limp mode in some vehicles.
- Boost-related noises, hesitation, or feel of over-boost conditions.
- Changes in fuel economy or unusual combustion symptoms due to incorrect boost data.
Note: Exact symptoms vary by make, model, and engine configuration.
Diagnosis and Troubleshooting Steps
Below is a logical sequence used by technicians to confirm P0236 and locate the fault.
- Connect a qualified OBD-II scanner and observe live data for Boost Sensor A readings, the 5V reference, and ground integrity.
- Inspect wiring and connectors for damage, corrosion, or loose pins; test continuity and resistance on the signal and ground circuits.
- Verify the sensor’s power supply and ground; check the 5V reference with a known-good source if needed.
- Check for boost leaks in the intake, intercooler, and hoses; perform a smoke test to identify leaks that could affect sensor readings.
- Confirm the wastegate or boost control solenoid operation; verify that commanded boost matches actual boost under various loads.
- If electrical faults are ruled out, consider replacing the boost sensor A or addressing any ECU/software issues per manufacturer service bulletins.
Conclusion: After following these diagnostic steps, you’ll typically pinpoint whether the issue is sensor-related, wiring, or a boost-control problem within the turbo system.
Repair Options and Considerations
Having isolated the fault, the repair path can include one or more of the following options.
- Replace Boost Sensor A with an OEM or high-quality equivalent sensor.
- Repair or replace damaged wiring and connectors in the sensor circuit; ensure proper grounding and sealing of the connector.
- Fix boost/vacuum leaks (vacuum lines, intercooler hoses, gaskets) and repair or replace boost control devices (solenoid or actuator) as needed.
- If applicable, perform ECU recalibration or software updates per the vehicle’s service bulletin or manufacturer guidelines.
Final note: Using the correct parts and ensuring proper calibration helps prevent repeat codes and maintains proper turbo performance.
Model and Vehicle Applicability
The P0236 code applies to turbocharged engines where a Boost Sensor A circuit exists. The exact sensor naming, wiring colors, and service procedures vary by make, model, and year. Always consult the official service documentation for your vehicle.
What to Do Next if You See P0236
Start with a quick data check: read live sensor data, inspect wiring, and look for boost leaks. If the problem persists, have a qualified technician diagnose with the right tools to determine whether the fault is sensor-related, wiring, or a boost-control fault.
Summary
P0236 denotes Turbocharger Boost Sensor A Circuit Range/Performance (High). It signals that the boost sensor A is reporting higher-than-expected readings, which can stem from sensor faults, wiring issues, leaks, or boost-control problems. Thorough diagnosis—covering live data, electrical integrity, and the boost path—guides the path to a proper repair. Addressing it promptly helps protect the engine and restore proper turbo performance.
How much does it cost to replace a turbocharger boost control position sensor?
The average cost for a Turbocharger Boost Sensor Replacement is between $221 and $268. Labor costs are estimated between $85 and $125 while parts are priced between $135 and $143. This range does not include taxes and fees, and does not factor in your unique location.
How do I fix error code P2563?
To fix code P2563, first, diagnose the root cause by inspecting the turbocharger's wastegate and the boost control actuator, as issues are often mechanical due to carbon buildup or a seized linkage. If the mechanical components are fine, check the wiring and connections to the turbocharger position sensor, clean out any soot from the turbo control system, or replace a faulty boost control actuator or solenoid.
Diagnostic and initial checks
This video demonstrates how to replace a boost pressure sensor: 55sStandard BrandYouTube · Apr 21, 2020
- Scan and analyze codes: Read all stored codes and check the freeze frame data for specific conditions when the code was set.
- Clean the turbo: Perform a soot cleaning of the turbo control system, as carbon buildup can cause the wastegate linkage to stick.
- Inspect the wastegate: Check if the wastegate linkage is seized or has excessive carbon buildup, as this is a common cause for this code, especially in smaller Volkswagen models.
- Check wiring and connections: Visually inspect the wiring harness for the boost control position sensor and actuator for any signs of damage, shorts, or loose connections.
- Test the vacuum supply: Ensure there is proper vacuum supply to the boost pressure control solenoid (N75) and the turbocharger actuator. Check for leaks in vacuum lines.
Component-specific repairs
- Replace the actuator or solenoid: If the mechanical components are functioning properly but the sensor is faulty, the turbocharger boost control actuator or the solenoid valve may need to be replaced.
- Replace the turbocharger: In some cases, the entire turbocharger assembly may need replacement if the problem is internal to the unit and cannot be repaired.
Final steps
- Perform a turbo learn test: If your scan tool supports it, run a turbo learn test to ensure the system is properly calibrated after the repair.
- Clear codes and test drive: Clear the codes and take the vehicle for a test drive to ensure the issue is resolved and the code does not return.
Where is the turbo boost pressure sensor located?
Of course after it goes through the turbo goes to the intercooler. Now the duct work leading into to the intake. And we've got our boost pressure sensor here located in the duct. Work.
How do I fix the P0236 code?
What repairs can fix the P0236 code?
- Replacing the boost sensor if it is not giving the correct input pressure reading to the ECM.
- Repairing or replacing hoses and connections to the turbo boost sensor that have kinks or blockage of the lines.
