P1738 Code - Problem in 2nd Clutch Pressure Switch Circuit
Quick Answer
The P1738 diagnostic trouble code (DTC) indicates a problem in the 2nd clutch pressure switch circuit in the vehicle's transmission system. Common causes include Faulty 2nd clutch pressure switch, Damaged or corroded wiring or connectors in the circuit, Low transmission fluid level. 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
- P1738 indicates Problem in 2nd Clutch Pressure Switch Circuit.
- Common causes
- Common causes include Faulty 2nd clutch pressure switch, Damaged or corroded wiring or connectors in the circuit, Low transmission fluid level.
- 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.
Fix Your Car Smarter
Try the New AutoCodes App!
Get complete OBDII diagnostics, repair solutions, and cost estimates, plus AI chat support on demand.
Code P1738 Description
The P1738 diagnostic trouble code (DTC) indicates a problem in the 2nd clutch pressure switch circuit in the vehicle's transmission system. This switch is responsible for monitoring the hydraulic pressure in the transmission's 2nd clutch. When the switch detects an issue with the pressure, it sends a signal to the engine control module (ECM) or transmission control module (TCM) to trigger the P1738 code.
Common Causes of P1738
- Faulty 2nd clutch pressure switch
- Damaged or corroded wiring or connectors in the circuit
- Low transmission fluid level
- Malfunctioning TCM or ECM
- Internal transmission problems such as a worn clutch or solenoid issues
Symptoms of P1738
- Harsh shifting between gears
- Slipping gears or difficulty staying in gear
- Delayed engagement when shifting from park to drive
- Illumination of the Check Engine Light
- Transmission not shifting into certain gears
How to Fix P1738
- Perform a diagnostic scan to confirm the P1738 code and identify the specific cause of the issue.
- Inspect the 2nd clutch pressure switch, wiring, and connectors for any damage or corrosion. Replace as necessary.
- Check and top up the transmission fluid level to the manufacturer's specifications.
- Test the TCM and ECM for proper functionality and replace if needed.
- If internal transmission problems are suspected, further inspection and repair by a professional transmission specialist may be required.
Cost to Fix P1738
The cost of repairing a P1738 code can vary depending on the specific cause of the issue and the labor rates in your area. On average, repairing a problem in the 2nd clutch pressure switch circuit may range from $200 to $500, including parts and labor. It's important to note that diagnostic time, parts, and labor rates can vary significantly, so it's recommended to obtain quotes from multiple auto repair shops to ensure a fair price.
Need more information about the P1738 code?
Need more information on how to fix the P1738 code? Get Access to Factory Service Manuals
Need Help with the Code?
Get the P1738 code diagnosed by a professional: Find a repair shop in your area
Code P1738 Information for Specific Makes
- P1738 Acura — Problem in 2nd Clutch Pressure Switch Circuit
- P1738 Honda — Problem in 2nd Clutch Pressure Switch Circuit
- P1738 Hyundai — Shift System Time Out
- P1738 Isuzu — Problem in 2nd Clutch Pressure Switch Circuit
Frequently Asked Questions about P1738 Code
1. What are the common symptoms of OBDII code P1738?
- Common symptoms include harsh shifting, delayed shifting, transmission slippage, and illuminated Check Engine light.
2. What causes the OBDII code P1738 to trigger?
- The code is triggered when there is a problem detected in the 2nd clutch pressure switch circuit within the transmission.
3. How serious is the OBDII code P1738?
- The code indicates a malfunction in the transmission system, which can potentially lead to further damage if not addressed promptly.
4. How can I diagnose the problem related to the 2nd clutch pressure switch circuit?
- Diagnosis typically involves using a scan tool to retrieve the trouble codes, checking the wiring and connectors related to the switch, and performing a thorough inspection of the transmission system.
5. Can I continue driving my vehicle with the OBDII code P1738 present?
- It is not recommended to drive the vehicle with this code present, as it can lead to further transmission issues and potential safety hazards.
6. What are the repair options for resolving the OBDII code P1738?
- Repair options may include replacing the faulty 2nd clutch pressure switch, repairing damaged wiring or connectors, or seeking professional help from a qualified mechanic.
7. How much does it typically cost to fix the issue related to the 2nd clutch pressure switch circuit?
- The cost of repairs can vary depending on the extent of the damage and the specific components that need to be replaced, but it can range from a few hundred to over a thousand dollars.
8. Are there any DIY tips for addressing the OBDII code P1738?
- DIY tips may include checking and cleaning the connectors, inspecting the wiring for any visible damage, and ensuring that the transmission fluid is at the correct level and in good condition.
9. Can a faulty 2nd clutch pressure switch circuit affect the overall performance of the vehicle?
- Yes, a faulty circuit can lead to transmission issues, affecting the vehicle's performance, fuel efficiency, and overall drivability.
10. Is it necessary to reset the OBDII code P1738 after repairs have been made?
- Yes, it is recommended to reset the code using a scan tool after repairs have been completed to clear the Check Engine light and monitor if the issue has been successfully resolved.
Discuss the causes and fixes for P1738 OBDII Code
Code P1738 comments
No comments found for this page.
Fix Your Car Smarter
Try the New AutoCodes App!
Get complete OBDII diagnostics, repair solutions, and cost estimates, plus AI chat support on demand.