U1039 Mercury Code - Invalid Or Missing Data For Primary Id Vehicle Speed
Quick Answer
Network Diagnostic Trouble Code (DTC) occurs during module-to-module communication concerns. Common causes include Faulty Vehicle Speed Sensor, Vehicle speed sensor harness or connectors is open or shorted, Vehicle speed sensor 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
- U1039 Mercury indicates Invalid Or Missing Data For Primary Id Vehicle Speed.
- Common causes
- Common causes include Faulty Vehicle Speed Sensor, Vehicle speed sensor harness or connectors is open or shorted, Vehicle speed sensor 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 U1039 Mercury Description
What are the Possible Causes of the DTC U1039 Mercury?
- Faulty Vehicle Speed Sensor
- Vehicle speed sensor harness or connectors is open or shorted
- Vehicle speed sensor circuit poor electrical connection
- Faulty Engine Control Module (ECM)
How to Fix the DTC U1039 Mercury?
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.
Code Tech Notes
1998-2002 Mercury Grand Marquis
1998-2002 Mercury Sable
1998-2001 Mercury Mountaineer
Mercury Factory Service Bulletin OBDII Code U1039
What is the Cost to Diagnose the Code?
Labor: 1.0
To diagnose the U1039 Mercury 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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Frequently Asked Questions about U1039 Mercury Code
1. What does OBDII code U1039 mean on a Mercury vehicle?
Code U1039 indicates "Invalid Or Missing Data For Primary Id Vehicle Speed," meaning the vehicle's systems are not receiving proper data from the speed sensor or related modules.
2. What are the common symptoms of code U1039 on a Mercury?
Symptoms may include erratic speedometer readings, the ABS or traction control light being on, poor cruise control functionality, or rough shifting in automatic transmissions.
3. What causes code U1039 on a Mercury?
The most common causes are a faulty vehicle speed sensor (VSS), damaged wiring or connectors, or issues with the ABS module or related communication circuits.
4. Can I drive my Mercury with code U1039?
While the vehicle may still be drivable, it could have impaired performance, such as inaccurate speed readings or compromised safety systems like ABS. It's best to address the issue promptly.
5. How do I diagnose code U1039 on a Mercury?
Start by checking the vehicle speed sensor and its wiring for damage or loose connections. Use a diagnostic scanner to confirm if the ABS module or other modules are not communicating properly.
6. How do I fix code U1039 on a Mercury?
Repairs may include replacing a faulty vehicle speed sensor, repairing damaged wiring, or reprogramming or replacing a malfunctioning control module.
7. Does clearing the code U1039 resolve the issue?
Clearing the code may temporarily remove it, but if the underlying issue isn’t fixed, the code will likely return.
8. What tools are needed to troubleshoot code U1039 on a Mercury?
You’ll need an OBDII scanner, a multimeter to test wiring and connectors, and possibly a repair manual specific to your Mercury model.
9. Can a bad ABS module cause code U1039 on a Mercury?
Yes, a malfunctioning ABS module can fail to send vehicle speed data to other systems, triggering code U1039.
10. How much does it cost to repair code U1039 on a Mercury?
Repair costs vary, but replacing a vehicle speed sensor typically costs $100-$300, while ABS module repairs can range from $400 to $1,200 depending on parts and labor.
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