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 the car's computer is noticing a difference between how much the car's engine wants to open the throttle and how much it actually opens. It's like when you want to open a door halfway, but it only opens a little bit.
The engine control module (ECM) is detecting a mismatch between the desired throttle position and the actual throttle position on Bank 2.
The P155E code is triggered when the ECM detects that the actual throttle position does not match the desired throttle position for Bank 2. This discrepancy can be due to a malfunction in the throttle actuator control system, which is responsible for regulating the amount of air entering the engine.
• Check Engine Light is on
• Poor engine performance
• Reduced fuel efficiency
• Faulty throttle actuator
• Wiring issues in the throttle actuator circuit
• ECM malfunction
Throttle Actuator: A component that controls the throttle valve in an engine.
ECM: Engine Control Module, the computer that manages engine functions.
• Use an OBD-II scanner to confirm the code.
• Inspect the wiring and connectors for the throttle actuator.
• Test the throttle actuator for proper operation.
• Replace the throttle actuator if faulty.
• Repair or replace damaged wiring or connectors.
• Reprogram or replace the ECM if necessary.
• OBD-II scanner
• Multimeter
• Screwdriver set
$200 - $800
Moderate
• BMW 5 Series
• Mercedes-Benz E-Class
• Audi A6
• Regularly check and maintain the throttle body.
• Ensure the vehicle's electrical system is in good condition.
• Perform routine engine diagnostics.
Engine Performance
• Avoid driving the vehicle if performance issues are severe.
• Have the vehicle inspected by a professional mechanic.
Throttle actuator issues may be covered under the vehicle's powertrain warranty.
This code has been more common in vehicles with electronic throttle control systems introduced in the late 2000s.
Moderate – It is advisable to address this issue soon to avoid potential engine performance problems.
Driving with a malfunctioning throttle actuator may lead to reduced engine performance and could be unsafe.
• Engine running
• Vehicle in motion
The throttle actuator is typically located on the throttle body, which is connected to the intake manifold.
Q: Can I drive with a P155E code?
A: It's not recommended to drive with this code as it can lead to poor engine performance and potential safety issues.
Q: How does a throttle actuator work?
A: A throttle actuator controls the opening and closing of the throttle valve, regulating the air entering the engine.
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