Easy one-page printout for the garage or repair shop
This summary uses the existing diagnostic information shown in full below.
This code means that a sensor in your car that checks the temperature of the turbocharger or supercharger isn't working properly. It's like when a thermometer isn't showing the right temperature.
The P2B90 code indicates that the vehicle's engine control module (ECM) has detected a low voltage signal from the temperature sensor associated with the turbocharger or supercharger labeled 'B'.
The turbocharger/supercharger temperature sensor B is responsible for monitoring the temperature of the air being compressed by the turbocharger or supercharger. A low circuit signal suggests that the sensor is sending a voltage reading that is below the expected range, which can affect engine performance and efficiency.
• Check Engine Light illuminated
• Reduced engine performance
• Possible overheating of the turbocharger/supercharger
• Faulty turbocharger/supercharger temperature sensor B
• Wiring issues such as short circuits or poor connections
• Faulty ECM or PCM
ECM: Engine Control Module
PCM: Powertrain Control Module
• Use an OBD-II scanner to confirm the code.
• Inspect the sensor and its wiring for damage or corrosion.
• Test the sensor's voltage output with a multimeter.
• Replace the faulty temperature sensor.
• Repair or replace damaged wiring or connectors.
• Reprogram or replace the ECM/PCM if necessary.
• OBD-II scanner
• Multimeter
• Socket set
$150 - $400
Moderate
• Ford F-150
• Chevrolet Silverado
• BMW 3 Series
• Regular maintenance of the turbocharger system
• Routine checks of sensor connections
• Timely replacement of faulty sensors
Sensor Issue
• Avoid heavy acceleration until the issue is fixed.
• Schedule an appointment with a mechanic promptly.
Check with the vehicle manufacturer for warranty coverage on sensors.
This code has been associated with vehicles equipped with turbochargers or superchargers, particularly in models with advanced emission systems.
Moderate – While the vehicle may still be drivable, reduced performance and potential overheating can lead to further damage.
Ignoring this code can lead to increased emissions and potential engine damage, which may not comply with emissions regulations.
• Engine at operating temperature
• Vehicle at idle
The temperature sensor is typically located near the turbocharger or supercharger unit, often on the intake or exhaust side.
Q: Can I drive with a P2B90 code?
A: It's possible to drive, but it's not recommended as it may lead to further damage or reduced performance.
Q: How can I prevent this code from appearing again?
A: Regular maintenance and inspections of the turbocharger system and associated sensors can help prevent this issue.
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