AutoCodes – RAM – P167A RAM

P167A RAM Code - Calibration Mismatch

Quick Answer

During the initial ignition on, the Transmission Control Module (TCM) receives the calibrated data from the EEPROM assembly inside the transmission and stores this information in the EEPROM of the TCM. Common causes include Transmission Control Module (TCM) Relearn Procedure Not Performed. 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: P167A RAM indicates Calibration Mismatch.
Common causes: Common causes include Transmission Control Module (TCM) Relearn Procedure Not Performed.
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 378

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 Mar 23, 2022

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P167A RAM Description

During the initial ignition on, the Transmission Control Module (TCM) receives the calibrated data from the EEPROM assembly inside the transmission and stores this information in the EEPROM of the TCM. At every ignition on, the TCM compares the stored data in the EEPROM to the transmitted data from the EEPROM in the transmission. If the calibration data does not match the DTC will set and the MIL will illuminate after one failure.

OBDII Code P167A RAM - Calibration Mismatch - AutoCodes.com — P167A RAM Code - Calibration Mismatch

What does this mean?

What are the Possible Causes of the DTC P167A RAM?

Transmission Control Module (TCM) Relearn Procedure Not Performed

How to Fix the DTC P167A RAM?

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 P167A RAM 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.

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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 P167A RAM Code

What does the OBDII code P167A RAM mean?

The OBDII code P167A RAM indicates a "Calibration Mismatch," which means that the engine control module (ECM) has detected a discrepancy between the software or calibration values it expects and what is actually present in the system.

What are the common symptoms of the P167A code?

Common symptoms include the check engine light being illuminated, potential engine performance issues, and possible difficulties with starting the vehicle or erratic engine behavior.

What can cause the P167A code to trigger?

Causes can include a recent firmware update that was not completed correctly, a replacement of the ECM with an incompatible unit, or issues with the vehicle's communication network.

How can I diagnose the P167A code?

To diagnose the P167A code, start by scanning the vehicleâ€™s computer using an OBDII scanner. Check for any other related codes, inspect the ECM for proper installation, and verify that the calibration files match the vehicle specifications.

What repairs are commonly needed for the P167A code?

Common repairs may include reprogramming the ECM with the correct calibration data, repairing any wiring issues, or replacing the ECM if it is found to be faulty or incompatible.

Can I reset the code P167A after repairs?

Yes, after performing the necessary repairs or reprogramming, you can clear the code using an OBDII scanner. However, ensure that the underlying issue has been resolved to prevent the code from returning.

Is it safe to drive with the P167A code present?

While it may be safe to drive at low speeds, it is not advisable to ignore the P167A code as it can lead to reduced engine performance or other issues. It's best to address the problem promptly.

Will a calibration mismatch affect my vehicle's fuel efficiency?

Yes, a calibration mismatch can potentially lead to poor fuel efficiency, as the engine may not be operating optimally, resulting in increased fuel consumption.

How can I prevent the P167A code from occurring in the future?

To prevent the P167A code, ensure that any software updates or ECM replacements are performed by qualified technicians and that the correct calibration files are used for your specific vehicle model. Regular maintenance and checks of the electrical system can also help.