AutoCodes – Dodge – P1635 Dodge

P1635 Dodge Code - PCM Memory Performance or Write

Quick Answer

P1635 Dodge indicates PCM Memory Performance or Write. Common causes include Faulty Powertrain Control Module (PCM), Powertrain Control Module (PCM) harness is open or shorted, Powertrain Control Module (PCM) 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: P1635 Dodge indicates PCM Memory Performance or Write.
Common causes: Common causes include Faulty Powertrain Control Module (PCM), Powertrain Control Module (PCM) harness is open or shorted, Powertrain Control Module (PCM) 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.

Save to My Repairs My Repairs

AI answers can be wrong. Verify repairs with testing. Open full chat

Code Popularity 3,595

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 03, 2019

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
Add Comment

💬 Need more help? Ask Coddy for instant answers — it's free!

Code P1635 Dodge Description

OBDII Code P1635 Dodge - PCM Memory Performance or Write - AutoCodes.com — P1635 Dodge Code - PCM Memory Performance or Write

What does this mean?

What are the Possible Causes of the DTC P1635 Dodge?

Faulty Powertrain Control Module (PCM)
Powertrain Control Module (PCM) harness is open or shorted
Powertrain Control Module (PCM) circuit poor electrical connection

How to Fix the DTC P1635 Dodge?

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 P1635 Dodge 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 P1635 Dodge code?

Need more information on how to fix the P1635 Dodge code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P1635 Dodge code diagnosed by a professional: Find a repair shop in your area

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 P1635 Dodge Code

1. What does the OBDII code P1635 Dodge indicate?

The P1635 code for Dodge vehicles indicates a problem with the PCM Memory Performance or Write, suggesting an issue in the powertrain control module's ability to store or retrieve data properly.

2. What are common symptoms of the P1635 code in a Dodge?

Symptoms may include the engine light being on, poor engine performance, erratic transmission shifts, and in some cases, the vehicle might fail to start or run smoothly.

3. What can cause the P1635 code to appear in a Dodge?

Causes can range from a faulty PCM, issues with the PCM's power supply such as poor grounding or voltage problems, to corrupted or lost data due to a disconnected battery or faulty memory components in the PCM.

4. How can I diagnose the P1635 code on my Dodge?

Diagnosis should start with scanning the PCM for this and any other codes. Further checks should include inspecting the PCM wiring and connectors for damage, verifying the power supply and ground to the PCM, and checking for any signs of water damage or corrosion.

5. What steps should I take to resolve the P1635 code in a Dodge?

Resolving this issue might involve clearing the code and seeing if it returns, repairing or replacing damaged wiring or connectors, ensuring proper voltage and ground connections to the PCM, or in more severe cases, replacing the PCM itself.

6. Is it safe to drive my Dodge with the P1635 code?

While you might be able to drive with this code active, it's not recommended as it indicates a fundamental issue with your vehicleâ€™s computer system which can lead to unpredictable vehicle behavior or a breakdown.

7. How urgent is it to fix a P1635 code on a Dodge?

It is fairly urgent to address this issue as the PCM plays a crucial role in vehicle operation and management. Ignoring this code can lead to more severe problems like vehicle stalling, increased emissions, or decreased fuel efficiency.

8. Can a dead battery cause the P1635 code in a Dodge?

Yes, a dead or disconnected battery can sometimes trigger this code because it may cause loss of data in the PCM or disrupt its normal operation.

9. Will resetting the PCM clear the P1635 code on a Dodge?

Resetting the PCM might temporarily clear the code, but if the underlying issue is not addressed, the code is likely to return. Proper diagnosis and repair are necessary for a permanent fix.

10. What tools are needed to diagnose the P1635 code in a Dodge?

Tools needed include an OBDII scanner, a multimeter for checking voltmages and grounds, and possibly a PCM tester or oscilloscope to further analyze PCM functionality.