What is OBD-II Code P213C – EGR Throttle Control Circuit B Low



OBD-II Code P213C – EGR Throttle Control Circuit B Low: Understanding and Repairing the Issue

The On-Board Diagnostic (OBD) system was introduced in the 1980s as a way to monitor and report problems in a vehicle’s engine. In 1996, the OBD-II system was introduced, which was required in all new vehicles in the United States. The OBD-II system is designed to detect any faults in a vehicle’s system and report them to the driver, often in the form of a check engine light. One of the issues that can trigger a check engine light is OBD-II Code P213C – EGR Throttle Control Circuit B Low. This article will explain what this code means, its causes, and how to repair the issue.

What is OBD-II Code P213C – EGR Throttle Control Circuit B Low?

OBD-II Code P213C – EGR Throttle Control Circuit B Low is a diagnostic trouble code that indicates a problem in a vehicle’s electronic throttle control (ETC) system. The ETC system controls the throttle valve opening to regulate airflow into the engine. The ETC system is operated by the Powertrain Control Module (PCM) and uses various sensors to provide the PCM with data on the engine’s operation and driving conditions. The ETC system is used to regulate the engine’s power output, fuel efficiency, and emissions.

The EGR (Exhaust Gas Recirculation) system is designed to reduce emissions by recirculating part of the exhaust gases back into the engine. The EGR valve is controlled by the PCM and can be affected by the ETC system’s malfunction. Code P213C indicates that there is a low voltage in the EGR throttle control circuit, which is likely caused by an issue in the ETC system.

What causes OBD-II Code P213C – EGR Throttle Control Circuit B Low?

There are several causes of OBD-II Code P213C, including:

1. Malfunctioning Throttle Position Sensor (TPS): The TPS is a sensor that provides the PCM with information on the position of the throttle valve. If the TPS is malfunctioning, it can cause a low voltage in the EGR throttle control circuit.

2. Malfunctioning Accelerator Pedal Position Sensor (APPS): The APPS is a sensor that provides the PCM with information on the position of the accelerator pedal. If the APPS is malfunctioning, it can cause a low voltage in the EGR throttle control circuit.

3. Wiring issues: The wiring in the ETC system can be damaged, corroded, or disconnected, which can result in a low voltage in the EGR throttle control circuit.

4. Failed EGR valve: If the EGR valve is malfunctioning or stuck open, it can cause a low voltage in the EGR throttle control circuit.

How to repair OBD-II Code P213C – EGR Throttle Control Circuit B Low?

To repair OBD-II Code P213C – EGR Throttle Control Circuit B Low, follow these steps:

1. Connect a diagnostic scanner to the OBD-II port and read the codes. This will determine whether the problem is in the ETC system or the EGR system.

2. Check the wiring in the ETC system for any damage, corrosion, or disconnection. Repair or replace any damaged wires.

3. Check the TPS and APPS sensors for proper operation. If either sensor is malfunctioning, replace it.

4. Check the EGR valve for proper operation. If the EGR valve is malfunctioning or stuck open, replace it.

5. Clear the code with the diagnostic scanner and drive the vehicle to see if the code reappears. If the code reappears, further diagnostics may be necessary.

Frequently Asked Questions:

1. Is OBD-II Code P213C a serious problem?

Yes, OBD-II Code P213C is a serious problem as it indicates a malfunction in the ETC system, which controls the throttle valve opening in the engine. If left unaddressed, it can lead to reduced power output, poor fuel efficiency, and increase in emissions.

2. Can I still drive my vehicle with OBD-II Code P213C?

It is not recommended to drive a vehicle with OBD-II Code P213C as it can cause reduced power output, poor fuel efficiency, and increase in emissions. It is best to have the issue addressed as soon as possible.

3. How much will it cost to repair OBD-II Code P213C?

The cost to repair OBD-II Code P213C will depend on the cause of the problem. The cost can range from a few hundred dollars to several thousand dollars, depending on the extent of the repairs needed.

4. Can OBD-II Code P213C be caused by a dead battery?

Yes, a dead or weak battery can cause OBD-II Code P213C to appear. This is because the ETC system relies on the battery to provide power to the sensors and control module.

5. How do I prevent OBD-II Code P213C from occurring again?

Regular maintenance on the ETC and EGR systems can prevent OBD-II Code P213C from occurring again. This includes regular cleaning of the throttle body and EGR valve, replacing worn-out sensors, and checking the wiring for any damage or corrosion.

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