P1624 BMW Code - MIL Request Signal Active
Quick Answer
P1624 BMW indicates MIL Request Signal Active. Common causes include Fault Codes stored in Transmission Control Module. 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
- P1624 BMW indicates MIL Request Signal Active.
- Common causes
- Common causes include Fault Codes stored in Transmission Control Module.
- 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 P1624 BMW Description
What are the Possible Causes of the DTC P1624 BMW?
- Fault Codes stored in Transmission Control Module
How to Fix the DTC P1624 BMW?
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
What is the Cost to Diagnose the Code?
Labor: 1.0
To diagnose the P1624 BMW 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 P1624 BMW Code
1. What does the BMW OBDII code P1624 mean?
P1624 in a BMW indicates "MIL Request Signal Active," meaning the transmission control module (TCM) has requested the engine control module (ECM) to turn on the Malfunction Indicator Light (MIL).
2. What are the common symptoms of code P1624 in a BMW?
Symptoms may include the check engine light being illuminated, poor transmission performance, erratic shifting, or the vehicle entering limp mode.
3. What causes the P1624 code to appear in a BMW?
Common causes include transmission system faults, communication issues between the TCM and ECM, wiring problems, or a malfunctioning sensor.
4. Can a faulty transmission cause the P1624 code?
Yes, transmission-related issues such as solenoid failure or internal mechanical problems can trigger the P1624 code.
5. How is the P1624 code diagnosed in a BMW?
A mechanic will use a diagnostic scanner to retrieve codes from both the TCM and ECM, inspect wiring and connectors, and test communication signals between the modules.
6. Is it safe to drive a BMW with the P1624 code?
Driving with the P1624 code may be unsafe, as it often indicates transmission issues that could worsen and lead to reduced performance or drivetrain damage.
7. How do you fix the P1624 code on a BMW?
Repairs may include addressing transmission faults, repairing or replacing damaged wiring, updating the ECM/TCM software, or replacing faulty sensors.
8. Can clearing the code fix the P1624 issue?
Clearing the code might turn off the check engine light temporarily, but the underlying problem must be resolved to prevent the code from returning.
9. Does P1624 always indicate a transmission problem in a BMW?
Not always. While it often relates to transmission issues, it could also be caused by communication errors or software glitches between the TCM and ECM.
10. How much does it cost to repair the P1624 code on a BMW?
The repair cost varies widely, ranging from $100 for a simple wiring fix to over $1,000 for major transmission repairs or module replacements.
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