OBD Guide
ENFRDEESPT

P1390

Timing Belt Skipped One Or More Teeth

P1390 is an OBD-II diagnostic trouble code meaning: Timing Belt Skipped One Or More Teeth. Common causes: worn or stretched timing belt, timing belt tensioner malfunction. Estimated repair cost: $33–167.

Severity
🔴 High
Can you drive?
Do not drive — repair immediately
Approx. repair cost
$33–167 (est.)

Symptoms

  • Unstable engine operation
  • Power Loss
  • Increased fuel consumption
  • Difficulty starting the engine
  • Check Engine Light

Causes

  • Worn or stretched timing belt
  • Timing belt tensioner malfunction
  • Belt tooth wear
  • Incorrect belt installation when replacing
  • Oil on the belt

How to Fix

  1. Check the condition of the timing belt and tensioner
  2. Replace the timing belt if there are signs of wear.
  3. Replace tensioner and rollers if necessary
  4. Check the timing marks match
  5. If necessary, adjust the valve timing

Related codes

P1345P0016P0017

Error P1390 by Vehicle Brand

BuickCadillacChevroletChryslerDodgeFordGMGMCJeepLincolnMazdaMercuryMitsubishiOldsmobilePlymouthPontiacSaturn

FAQ

What does the P1390 code mean?

P1390 is an OBD-II diagnostic trouble code that indicates: Timing Belt Skipped One Or More Teeth

What causes a P1390 error code?

The most common causes of P1390 include: Worn or stretched timing belt; Timing belt tensioner malfunction; Belt tooth wear; Incorrect belt installation when replacing.

How do I fix a P1390 diagnostic trouble code?

To fix P1390: Check the condition of the timing belt and tensioner. Replace the timing belt if there are signs of wear.. Replace tensioner and rollers if necessary. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with P1390?

Do not drive — repair immediately

How much does it cost to fix P1390?

The estimated repair cost for P1390 is $33–167. Actual cost depends on your vehicle, location, and labor rates.

FRDEESPT

See also: Russian version · NationStat