Error code

OBD2 P0899

OBD2P0899
Diagnostic Trouble Code· Standard OBD-II fault code read from the vehicle's onboard diagnostics.

What it means

Transmission Control System MIL Request Circuit High.

Severity

moderateCan drive but may experience transmission issues.

Summary

P0899 indicates an issue with the transmission control system's MIL (Malfunction Indicator Light) request circuit being in a high state, typically due to wiring or electrical issues.

Common Causes

  • Wiring problems
  • Poor connection
  • Short to positive

Fixes

FAQ

What does P0899 mean?

P0899 indicates a high state in the transmission control system's MIL request circuit, often due to wiring or electrical issues.

How serious is P0899?

Moderately serious. It can cause transmission problems but does not prevent driving.

View source

Not affiliated with OBD2. Answer summarized from the manufacturer's manual linked above; consult that source for the authoritative procedure.

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