AutoCodes – Generic – P16FB

P16FB Code - Control Module Speed Signal Analog to Digital Converter Performance

Quick Answer

This diagnostic applies to internal integrity conditions within the Transmission Control Module (TCM). Common causes include Faulty Transmission Control Module (TCM), Transmission Control Module (TCM) harness is open or shorted, Transmission Control Module (TCM) circuit poor electrical connection. 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: P16FB indicates Control Module Speed Signal Analog to Digital Converter Performance.
Common causes: Common causes include Faulty Transmission Control Module (TCM), Transmission Control Module (TCM) harness is open or shorted, Transmission Control Module (TCM) circuit poor electrical connection.
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 3,459

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 Jan 14, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P16FB Description

This diagnostic applies to internal integrity conditions within the Transmission Control Module (TCM). This diagnostic also addresses if the TCM is not programmed.

OBDII Code P16FB - Control Module Speed Signal Analog to Digital Converter Performance - AutoCodes.com — P16FB Code - Control Module Speed Signal Analog to Digital Converter Performance

What does this mean?

What are the Possible Causes of the DTC P16FB?

Faulty Transmission Control Module (TCM)
Transmission Control Module (TCM) harness is open or shorted
Transmission Control Module (TCM) circuit poor electrical connection

How to Fix the DTC P16FB?

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 P16FB 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 P16FB code?

Need more information on how to fix the P16FB code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P16FB code diagnosed by a professional: Find a repair shop in your area

Information for Specific Makes

P16FB Buick — Control Module Speed Signal Analog to Digital Converter Performance
P16FB Cadillac — Control Module Speed Signal Analog to Digital Converter Performance
P16FB Chevrolet — Control Module Speed Signal Analog to Digital Converter Performance
P16FB GMC — Control Module Speed Signal Analog to Digital Converter 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.

Frequently Asked Questions about P16FB Code

1. What are the common symptoms of OBDII code P16FB?

- Common symptoms include issues with vehicle speed readings, erratic speedometer operation, and potential illumination of the check engine light.

2. What can cause the OBDII code P16FB to trigger?

- The code P16FB typically triggers due to a malfunction in the analog-to-digital converter within the control module responsible for processing speed signals.

3. How serious is the OBDII code P16FB?

- While the code itself may not directly affect the drivability of the vehicle, it can lead to inaccurate speed readings and potential safety concerns. It's recommended to address the issue promptly.

4. Can a faulty speed sensor cause the OBDII code P16FB?

- Yes, a faulty speed sensor can potentially trigger the P16FB code if it interferes with the proper conversion of speed signals from analog to digital within the control module.

5. What are some DIY repair tips for OBDII code P16FB?

- DIY repair options may include checking and cleaning speed sensors, inspecting wiring connections for any damage, and ensuring proper grounding of the control module.

6. Is it safe to continue driving with the OBDII code P16FB unresolved?

- It is generally not recommended to continue driving with unresolved OBDII codes, including P16FB, as it can lead to inaccurate speed readings and potential safety hazards on the road.

7. How can a mechanic diagnose the OBDII code P16FB?

- A mechanic can diagnose the P16FB code using a diagnostic scanner to retrieve the code, inspecting the speed sensors and related wiring, and testing the analog-to-digital converter within the control module.

8. Can resetting the OBDII code P16FB resolve the issue temporarily?

- Resetting the code may temporarily clear the check engine light, but if the underlying issue causing the P16FB code is not addressed, it is likely to reoccur.

9. Are there any recalls related to the OBDII code P16FB?

- It's recommended to check with the vehicle manufacturer or the National Highway Traffic Safety Administration (NHTSA) for any recalls related to the P16FB code in specific vehicle models.

10. How much does it typically cost to repair the OBDII code P16FB?

- Repair costs for the P16FB code can vary depending on the underlying cause and the necessary repairs. It's advisable to consult a mechanic for a proper diagnosis and cost estimate.