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Code P1630

Symptoms

• Check Engine Light is on

• Poor engine performance

• Engine stalling or hesitation

Common Causes

• Faulty throttle body

• Wiring issues in the throttle circuit

• Failed throttle position sensor

Glossary

Throttle Body: A component of the air intake system that controls the amount of air entering the engine.

Throttle Position Sensor: A sensor that monitors the position of the throttle valve and sends data to the ECM.

Related Codes

• P1631

• P1632

Official description

Throttle Valve Circuit (Bank 2)

Laymans terms

This code means there's a problem with the part of the car that controls how much air goes into the engine, like a door that opens and closes. It's not working right on one side of the engine.

Explanation

The throttle valve is responsible for regulating the amount of air entering the engine. This code indicates an issue with the electronic control circuit for the throttle valve on bank 2.

Technical description

P1630 is triggered when the Engine Control Module (ECM) detects a malfunction in the throttle valve circuit for bank 2. This can be due to electrical issues, such as a short or open circuit, or a mechanical failure in the throttle body.

Diagnosis steps

• Use an OBD-II scanner to confirm the code.

• Inspect the throttle body and related wiring for damage.

• Test the throttle position sensor for proper operation.

Repair procedures

• Replace or repair the throttle body if faulty.

• Fix any damaged wiring or connectors in the throttle circuit.

• Replace the throttle position sensor if it is not functioning properly.

Tools required

• OBD-II scanner

• Multimeter

• Screwdriver set

Estimated repair cost

$200 - $600

Difficulty level

Moderate

Commonly affected vehicles

• BMW 5 Series

• Mercedes-Benz E-Class

• Audi A6

Preventive measures

• Regular maintenance of the throttle body

• Periodic inspection of engine wiring

• Timely replacement of faulty sensors

Error code type

Sensor Issue

User experience recommendations

• Avoid driving the vehicle until the issue is fixed to prevent further damage.

• Consult with a professional mechanic for accurate diagnosis and repair.

Warranty information

Check with your vehicle manufacturer for warranty coverage on throttle body components.

Historical data

P1630 has been a common issue in vehicles with electronic throttle control systems, especially in models with high mileage.

Urgency level

Moderate – It is recommended to address this issue soon to avoid potential engine performance problems.

Legal and safety notice

Driving with a malfunctioning throttle can lead to unsafe driving conditions. Address this issue promptly.

Testing conditions

• Engine running

• Vehicle stationary

Component location

The throttle body is located between the air filter and the intake manifold on the engine.

FAQs

Q: Can I drive my car with code P1630?
A: It's not recommended to drive with this code active as it can lead to poor engine performance and unsafe driving conditions.

Q: How do I reset the P1630 code?
A: After repairs, use an OBD-II scanner to clear the code. If the issue is fixed, the code should not return.

Last updated: Apr 16, 2026 • Source: internal database
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