P1643 Code - Wait To Start Lamp Control Circuit Conditions
Quick Answer
With the key on or engine running, then with the Wait To Start lamp requested on (Test 1), the Powertrain Control Module (PCM) detects that the voltage ON the lamp control circuit was high, or with the lamp requested off, that the voltage on the lamp control circuit was near zero (0) volts. Common causes include Faulty Wait To Start Lamp, Wait To Start Lamp harness is open or shorted, Wait To Start Lamp 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
- P1643 indicates Wait To Start Lamp Control Circuit Conditions.
- Common causes
- Common causes include Faulty Wait To Start Lamp, Wait To Start Lamp harness is open or shorted, Wait To Start Lamp 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.
Code P1643 Description
What are the Possible Causes of the DTC P1643?
- Faulty Wait To Start Lamp
- Wait To Start Lamp harness is open or shorted
- Wait To Start Lamp circuit poor electrical connection
How to Fix the DTC P1643?
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 P1643 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 P1643 code?
Need more information on how to fix the P1643 code? Get Access to Factory Service Manuals
Need Help with the Code?
Get the P1643 code diagnosed by a professional: Find a repair shop in your area
Information for Specific Makes
- P1643 Buick — Wait To Start Lamp Control Circuit Conditions
- P1643 Cadillac — Wait To Start Lamp Control Circuit Conditions
- P1643 Chevrolet — Wait To Start Lamp Control Circuit Conditions
- P1643 Dodge — Vehicle Theft System Powertrain Control Module in Learn Mode
- P1643 Ford — Fuel Pump Monitor Circuit Low Input
- P1643 GMC — Wait To Start Lamp Control Circuit Conditions
- P1643 Honda — Battery Signal Circuit High Input
- P1643 Jaguar — CAN ECM / TCM Network Malfunction
- P1643 Mazda — CAN Link ECM/TCM Circuit Network
- P1643 Mercedes-Benz — Engine Control Module Incorrectly Coded
Frequently Asked Questions about P1643 Code
1. What are the common symptoms of OBDII code P1643?
- The common symptoms of code P1643 include the "Wait To Start" lamp on the dashboard not illuminating when the ignition is turned on.
2. What are the possible causes of OBDII code P1643?
- Possible causes of code P1643 include a faulty "Wait To Start" lamp, a wiring issue in the lamp circuit, or a problem with the PCM (Powertrain Control Module).
3. How can I diagnose the cause of OBDII code P1643?
- You can diagnose code P1643 by visually inspecting the "Wait To Start" lamp for any physical damage, checking the wiring for any breaks or corrosion, and using a diagnostic tool to scan the PCM for any fault codes.
4. Can I still drive my vehicle with OBDII code P1643?
- While it may be possible to drive your vehicle with code P1643, it is recommended to address the issue promptly to prevent any potential starting problems in the future.
5. How can I repair OBDII code P1643?
- To repair code P1643, you may need to replace the faulty "Wait To Start" lamp, repair any damaged wiring in the circuit, or reprogram the PCM if necessary.
6. Can a DIY enthusiast fix OBDII code P1643?
- Depending on your skill level and experience with automotive repairs, a DIY enthusiast may be able to address code P1643 by following a repair manual or seeking guidance from online resources.
7. Is OBDII code P1643 related to any other codes?
- Code P1643 is specific to the "Wait To Start" lamp control circuit conditions and may not be directly related to other OBDII codes.
8. Will resetting the OBDII system clear code P1643?
- Resetting the OBDII system may temporarily clear code P1643, but it is important to diagnose and repair the underlying issue to prevent the code from reappearing.
9. How long does it typically take to repair OBDII code P1643?
- The time it takes to repair code P1643 can vary depending on the cause of the issue, the availability of parts, and your repair experience, but it may take anywhere from a few hours to a day.
10. Are there any recalls related to OBDII code P1643?
- It is recommended to check with your vehicle manufacturer or a trusted dealership to see if there are any recalls related to OBDII code P1643 for your specific vehicle make and model.
Discuss the causes and fixes for P1643 OBDII Code
Fix Your Car Smarter
Try the New AutoCodes App!
Get complete OBDII diagnostics, repair solutions, and cost estimates, plus AI chat support on demand.
