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P1086 fault code: what it means

P1086: Subaru code: TGV #2 (left) position sensor circuit low.

Engine and gearbox (powertrain) · Minor

Usual causes, most likely first

  1. faulty TGV position sensor
  2. corroded TGV connector (sits under the intake)
  3. wiring fault, or TGV deleted without a tune

P1086 by make

Subaru

Subaru code: TGV #2 (left) position sensor circuit low.

Usual causes: faulty TGV position sensor; corroded TGV connector (sits under the intake); wiring fault, or TGV deleted without a tune

Not sure what P1086 means on your car? Ask Credov.

Before you clear it

Write the code down or photograph the scanner first. A code that comes straight back after clearing points to a fault that is still there. A car whose codes were cleared just before you arrived may be hiding one: the scanner's readiness monitors show "not ready" for a while after codes are cleared.

Researched by Credov from manufacturer and workshop sources. A fault code points to where a fault may be; a workshop confirms it with a diagnosis. Browse all fault codes.