P0236: Turbocharger Boost Sensor A Circuit Range/Performance
Can you still drive? Drive gently with reduced load. The turbo system is not operating correctly, and forced acceleration could cause engine damage from improper boost control.
What Does P0236 Mean?
Code P0236 means the turbocharger boost pressure sensor readings are within the circuit voltage range but do not match expected boost levels based on engine load, RPM, and wastegate position. The sensor may be reading but its values are implausible or not changing as expected, indicating a performance issue rather than a complete circuit failure.
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An OBD-II scanner lets you read and clear diagnostic trouble codes from your vehicle's computer. Most scanners work with any car made after 1996.
Browse OBD-II Scanners on AmazonCommon Causes
- Boost leak in intercooler piping or hoses
- Partially clogged boost sensor vacuum line
- Failing boost pressure sensor
- Sticking wastegate or wastegate actuator
- Carbon buildup restricting airflow
Symptoms
- Check engine light on
- Inconsistent turbo boost
- Reduced power output
- Engine hesitation under load
- Possible limp mode activation
Diagnostic Steps
- 1Read freeze frame data and compare boost pressure to expected values at various RPMs
- 2Perform a boost leak test on the entire turbo and intercooler system
- 3Inspect the vacuum line to the boost sensor for kinks or partial blockage
- 4Compare boost sensor reading to a mechanical gauge under load
- 5Check wastegate operation and actuator vacuum response
- 6Clean or replace the boost pressure sensor
Recommended Parts & Tools
boost pressure sensor
intercooler hose clamps
boost leak tester
Estimated Repair Cost
| Type | Estimated Cost |
|---|---|
| Total Repair Cost Range | $100 - $800 |
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Chat with AI About P0236Commonly Affected Vehicles
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Frequently Asked Questions
What is the difference between P0235 and P0236?
P0235 is a general circuit malfunction where the sensor signal is completely out of range or missing. P0236 means the sensor circuit works but the readings do not match expected boost performance, suggesting a mechanical issue like a boost leak.
How do I test for boost leaks?
A boost leak test involves pressurizing the intercooler and turbo piping with compressed air and listening or spraying soapy water to find leaks. Purpose-built boost leak testers are available for around $50.
Can a sticking wastegate cause P0236?
Yes, if the wastegate is stuck open, boost pressure will be lower than expected. If stuck closed, boost will be higher than expected. Either condition can trigger P0236.
Community Fix Reports
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