AutoCodes – Generic – P050B

P050B Code - Cold Start Ignition Timing Performance

Quick Answer

The Electronic Throttle Control System (ETCS) controls the engine idling speed. Common causes include Throttle body assembly, Mass Air Flow (MAF) meter, Air induction system. Severity is High - diagnose this code as soon as possible. Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.

What it means: P050B indicates Cold Start Ignition Timing Performance.
Common causes: Common causes include Throttle body assembly, Mass Air Flow (MAF) meter, Air induction system.
Severity: High - diagnose this code as soon as possible.
Can I drive?: Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.

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Code Popularity 29,117

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

What is this?

Table of contents Created and updated by William Orellana on Sep 02, 2022

Description
Possible Causes
How To Fix
Cost to Diagnose
Comments
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Code P050B Description

The Electronic Throttle Control System (ETCS) controls the engine idling speed. The ETCS operates the throttle actuator to open and close the throttle valve and adjusts the intake air amount to achieve the target idling speed. In addition, the Engine Control Module (ECM) retards the ignition timing and the ETCS increases the intake air amount to quickly increase the catalyst temperature at the cold start to reduce emissions. The Diagnostic Trouble Code (DTC) will set when the temperature of the catalyst inlet does not rise to the proper temperature when the engine is started with pre-warming up condition.

OBDII Code P050B - Cold Start Ignition Timing Performance - AutoCodes.com — P050B Code - Cold Start Ignition Timing Performance

What does this mean?

What are the Possible Causes of the DTC P050B?

Throttle body assembly
Mass Air Flow (MAF) meter
Air induction system
PCV hose connections
VVT system
Air cleaner filter element
Engine Control Module (ECM)

How to Fix the DTC P050B?

Review the 'Possible Causes' above and visually examine the corresponding wiring harness and connectors. Check for damaged components and inspect connector pins for signs of being broken, bent, pushed out, or corroded.

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P050B code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.

Need more information about the P050B code?

Need more information on how to fix the P050B code? Get Access to Factory Service Manuals

Need Help with the Code?

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Information for Specific Makes

P050B Acura — Cold Start Ignition Timing Control System Performance Problem
P050B Chrysler — Cold Start Ignition Timing Performance
P050B Dodge — Cold Start Ignition Timing Performance
P050B Ford — Cold Start Ignition Timing Performance
P050B Honda — Cold Start Ignition Timing Control System Performance Problem
P050B Infiniti — Cold Start Ignition Timing Performance
P050B Jeep — Cold Start Ignition Timing Performance
P050B Land Rover — Cold Start Ignition Timing Performance
P050B Lexus — Cold Start Ignition Timing Performance
P050B Lincoln — Cold Start Ignition Timing Performance
P050B Mercury — Cold Start Ignition Timing Performance
P050B Nissan — Cold Start Ignition Timing Performance
P050B RAM — Cold Start Ignition Timing Performance
P050B Scion — Cold Start Ignition Timing Performance
P050B Suzuki — Cold Start Ignition Timing Performance
P050B Toyota — Cold Start Ignition Timing Performance

About the author: William Orellana is a Master Mechanic and Mechanical Engineer with over 30 years of experience diagnosing and repairing vehicles. Learn more about his background.