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Code P16B6

Quick reference

P16B6 at a glance

Plain-language meaning
This code means that the car's computer is having trouble checking if the electronic throttle control (ETC) is working properly. It's like when your computer can't run a program to see if everything is okay.
Urgency
Moderate – It's important to address this issue to avoid potential driving safety concerns.
Difficulty
Moderate
System
Sensor Issue
Tools mentioned
OBD-II scanner, Multimeter, Screwdriver set

This summary uses the existing diagnostic information shown in full below.

Laymans terms

This code means that the car's computer is having trouble checking if the electronic throttle control (ETC) is working properly. It's like when your computer can't run a program to see if everything is okay.

Explanation

The P16B6 code is triggered when the vehicle's control module detects an issue during its self-test of the electronic throttle control system.

Technical description

The P16B6 code indicates a malfunction in the self-test process of the electronic throttle control (ETC) system. This test is performed by the vehicle's control module to ensure the ETC is operating correctly. If the self-test fails, it suggests there may be an issue with the ETC system or its components.

Symptoms

• Check Engine Light is on

• Reduced engine performance

• Unresponsive throttle

Common Causes

• Faulty electronic throttle control module

• Wiring issues in the ETC circuit

• Defective control module

Glossary

ETC: Electronic Throttle Control

OBD-II: On-Board Diagnostics, Second Generation

Diagnosis steps

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

• Inspect the wiring and connectors related to the ETC system.

• Test the electronic throttle control module for faults.

Repair procedures

• Repair or replace damaged wiring in the ETC circuit.

• Replace the electronic throttle control module if faulty.

• Reprogram or replace the control module if necessary.

Tools required

• OBD-II scanner

• Multimeter

• Screwdriver set

Estimated repair cost

$200 - $800

Difficulty level

Moderate

Commonly affected vehicles

• Ford Focus

• Chevrolet Cruze

• Toyota Camry

Preventive measures

• Regularly inspect and maintain the throttle body and its components.

• Ensure all electrical connections are secure and free of corrosion.

• Follow the vehicle's maintenance schedule.

Error code type

Sensor Issue

User experience recommendations

• Avoid driving the vehicle if the throttle is unresponsive.

• Consult a professional mechanic for a thorough diagnosis.

Warranty information

Check your vehicle's warranty; some components may be covered under powertrain warranty.

Historical data

The P16B6 code has been reported in vehicles with electronic throttle control systems, particularly as they age or in cases of poor maintenance.

Urgency level

Moderate – It's important to address this issue to avoid potential driving safety concerns.

Testing conditions

• Engine running

• Vehicle at operating temperature

Component location

The electronic throttle control module is typically located near the throttle body on the engine.

FAQs

Q: Can I drive my car with a P16B6 code?
A: It's not recommended to drive with this code, as it can affect throttle response and vehicle safety.

Q: How do I clear a P16B6 code?
A: After repairs, use an OBD-II scanner to clear the code. If the issue is fixed, the code should not return.

Optional diagnostic gear

Tools that may help diagnose P16B6

THINKCAR ThinkScan Bidirectional diagnostic tool illustration

High-End · Full-system diagnostics

THINKCAR ThinkScan Bidirectional

A full-system bidirectional platform aimed at advanced DIY users and professional diagnostic workflows.

Network faults often require full-system access instead of a generic code reader alone.

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Klein Tools MM325 diagnostic tool illustration

Universal · Digital multimeter

Klein Tools MM325

A solid entry-level multimeter for voltage, continuity, resistance, and basic electrical troubleshooting.

Helpful for checking voltage drops, grounds, and basic circuit health when modules are not communicating.

View on Amazon
WORKPRO Wiring Repair Kit diagnostic tool illustration

Universal · Wire connectors and repair kit

WORKPRO Wiring Repair Kit

Useful when diagnosis points toward damaged wiring, corroded terminals, or connector repairs.

Useful if diagnosis points toward damaged connectors, wiring, or terminal repairs.

View on Amazon

These are optional diagnostic tools, not guaranteed fixes. As an Amazon Associate I earn from qualifying purchases.

Source: ezOBD2 diagnostic database
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