P0899
Transmission Control System MIL Request Circuit High
P0899 is an OBD-II diagnostic trouble code meaning: Transmission Control System MIL Request Circuit High. Common causes: short circuit in mil request circuit, broken wiring. Estimated repair cost: $17–111.
Symptoms
- Check Engine Light Is On
- The transmission goes into emergency mode
- Limited gear shift
- Reduced engine power
- Possible problems with cruise control
Causes
- Short circuit in MIL request circuit
- Broken wiring
- Transmission control module (TCM) malfunction
- Relay or fuse problems
- Corrosion of contacts in connectors
How to Fix
- Check wiring continuity in MIL request circuit
- Inspect TCM connectors for corrosion or damage.
- Check MIL Request Circuit Voltage
- Test or replace TCM if necessary
- Check and replace damaged relays or fuses
Related codes
Error P0899 by Vehicle Brand
FAQ
What does the P0899 code mean?
P0899 is an OBD-II diagnostic trouble code that indicates: Transmission Control System MIL Request Circuit High
What causes a P0899 error code?
The most common causes of P0899 include: Short circuit in MIL request circuit; Broken wiring; Transmission control module (TCM) malfunction; Relay or fuse problems.
How do I fix a P0899 diagnostic trouble code?
To fix P0899: Check wiring continuity in MIL request circuit. Inspect TCM connectors for corrosion or damage.. Check MIL Request Circuit Voltage. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with P0899?
Yes, but get it checked soon
How much does it cost to fix P0899?
The estimated repair cost for P0899 is $17–111. Actual cost depends on your vehicle, location, and labor rates.
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