AutoCodes – Cadillac – P1657 Cadillac

P1657 Cadillac Code - Skip Shift 1 To 4 Upshift System Control Circuit

Quick Answer

With the engine speed over 600 rpm, the Powertrain Control Module (PCM) detects the commanded state of the Upshift driver and the Actual state of the control circuit did not match, all conditions met for over 5 seconds. Common causes include Faulty Solenoid, Solenoid harness is open or shorted, Solenoid 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: P1657 Cadillac indicates Skip Shift 1 To 4 Upshift System Control Circuit.
Common causes: Common causes include Faulty Solenoid, Solenoid harness is open or shorted, Solenoid 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 2,517

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 06, 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 P1657 Cadillac Description

OBDII Code P1657 Cadillac - Skip Shift 1 To 4 Upshift System Control Circuit - AutoCodes.com — P1657 Cadillac Code - Skip Shift 1 To 4 Upshift System Control Circuit

What does this mean?

What are the Possible Causes of the DTC P1657 Cadillac?

Faulty Solenoid
Solenoid harness is open or shorted
Solenoid circuit poor electrical connection

How to Fix the DTC P1657 Cadillac?

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 P1657 Cadillac 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 P1657 Cadillac code?

Need more information on how to fix the P1657 Cadillac code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P1657 Cadillac 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 P1657 Cadillac Code

1. What are common symptoms of OBDII code P1657 in a Cadillac related to the Skip Shift 1 To 4 Upshift System Control Circuit?

- Common symptoms include the inability to shift from 1st to 4th gear, illuminated check engine light, and potential decreased fuel efficiency.

2. What are the possible causes of OBDII code P1657 in a Cadillac?

- The code P1657 can be triggered by issues such as a faulty skip shift solenoid, damaged wiring or connectors in the upshift system control circuit, or a malfunctioning transmission control module.

3. How can I diagnose the cause of OBDII code P1657 in my Cadillac?

- To diagnose the issue, you can perform a visual inspection of the wiring and connectors, test the skip shift solenoid for proper operation, and use a diagnostic scanner to check for any related trouble codes in the system.

4. Can I continue driving my Cadillac with OBDII code P1657 present?

- While the vehicle may still be operable with this code, it is advisable to address the underlying issue promptly to prevent potential damage to the transmission and ensure optimal performance.

5. Is it safe to reset the OBDII code P1657 in my Cadillac using a diagnostic scanner?

- Resetting the code may temporarily turn off the check engine light, but it will not fix the underlying problem causing the code. It's recommended to diagnose and repair the issue to prevent the code from reoccurring.

6. How can I repair OBDII code P1657 in a Cadillac related to the Skip Shift 1 To 4 Upshift System Control Circuit?

- Repair options include replacing the skip shift solenoid, repairing or replacing damaged wiring/connectors, or reprogramming the transmission control module if necessary.

7. Are there any DIY tips for addressing OBDII code P1657 in my Cadillac?

- DIY enthusiasts with automotive experience can attempt to inspect wiring/connectors for damage, clean and test the skip shift solenoid, or consult the vehicle's service manual for specific troubleshooting steps.

8. Can extreme weather conditions impact the triggering of OBDII code P1657 in a Cadillac?

- Yes, extreme temperatures or moisture can potentially affect the skip shift system components, wiring, or connectors, leading to the activation of code P1657.

9. How long does it typically take to repair OBDII code P1657 in a Cadillac at a professional auto repair shop?

- The repair time can vary depending on the exact cause of the code and the complexity of the repair needed. On average, it may take a few hours to a full day for a skilled technician to diagnose and fix the issue.

10. Will fixing OBDII code P1657 improve the overall performance and drivability of my Cadillac?

- Yes, resolving code P1657 and restoring proper operation of the Skip Shift 1 To 4 Upshift System Control Circuit can lead to improved shifting performance, smoother operation, and enhanced overall drivability of the vehicle.