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 has detected a problem with the electrical line that helps control how much air goes into the engine. It's like a wire that tells the engine how to breathe is not working right.
The P156E code is triggered when the Engine Control Module (ECM) detects a high voltage condition in the throttle valve enable line circuit for bank 1. This can affect the throttle's ability to open and close properly.
The throttle valve enable line circuit is responsible for transmitting signals from the ECM to the throttle body, allowing it to control the air intake into the engine. A 'high' circuit condition indicates that the voltage is higher than the expected range, which can cause improper throttle operation.
• Check Engine Light is on
• Poor acceleration
• Engine stalling or rough idle
• Faulty throttle body
• Damaged or corroded wiring or connectors
• Faulty ECM
ECM: Engine Control Module, the computer that controls engine functions.
Throttle Body: A component that controls the amount of air entering the engine.
• Use an OBD-II scanner to confirm the code.
• Inspect the throttle body and related wiring for damage.
• Check the voltage and ground signals at the throttle body connector.
• Repair or replace damaged wiring or connectors.
• Replace the throttle body if faulty.
• Reprogram or replace the ECM if necessary.
• OBD-II scanner
• Multimeter
• Basic hand tools
$150 - $500
Moderate
• Chevrolet Silverado
• Ford F-150
• Toyota Camry
• Regularly inspect and clean throttle body.
• Ensure all electrical connections are secure and free of corrosion.
• Perform routine vehicle maintenance.
Sensor Issue
• Avoid driving aggressively until the issue is fixed.
• Have the vehicle inspected by a professional mechanic.
Check with your vehicle manufacturer for specific warranty coverage related to the throttle system.
The P156E code has been associated with throttle body and ECM issues in various vehicles over the years, often related to wiring problems.
Moderate – While the vehicle may still be drivable, it can lead to poor performance and should be addressed soon.
Ignoring this code can lead to unsafe driving conditions. Always ensure your vehicle is in good working order.
• Engine running
• Throttle body connected
The throttle body is typically located between the air filter and the intake manifold.
Q: Can I drive with a P156E code?
A: It's possible to drive, but the vehicle may not perform well. It's best to have it checked as soon as possible.
Q: How do I reset the P156E code?
A: You can reset the code using an OBD-II scanner, but it's important to fix the underlying issue first.
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