OBD Guide
ENFRDEESPT

P01DB

Cylinder 9 Injection Timing Performance - Over Retarded

P01DB is an OBD-II diagnostic trouble code meaning: Cylinder 9 Injection Timing Performance - Over Retarded. Common causes: wear or malfunction of the 9th cylinder injector, low fuel pressure in the 9th cylinder circuit. Estimated repair cost: $111–444.

Severity
⚠️ Medium
Can you drive?
Do not drive — repair immediately
Approx. repair cost
$111–444 (est.)

Symptoms

  • Loss of engine power
  • Unstable idling
  • Increased fuel consumption
  • Black smoke from the exhaust pipe
  • Misfire in cylinder 9

Causes

  • Wear or malfunction of the 9th cylinder injector
  • Low fuel pressure in the 9th cylinder circuit
  • Clogged fuel filter
  • Problems with the wiring harness or contacts to the cylinder 9 injector
  • High pressure fuel pump malfunction
  • Mechanical wear of the injection pump drive

How to Fix

  1. Read fault codes and freeze frame data to determine the error conditions.
  2. Check the condition and performance of the 9th cylinder injector on the stand.
  3. Check the fuel rail pressure and high pressure pump performance.
  4. Inspect the injector wiring harness and electrical connector for damage, corrosion, or poor connections.
  5. If necessary, replace the faulty injector, clean or replace the fuel filter.
  6. Clear errors from the ECU memory and perform a test drive to verify that the problem has been resolved.

Related codes

P0209P026CP0087P0088

Error P01DB by Vehicle Brand

AcuraAudiBAICBMWBYDBuickCadillacChanganCheryChevroletChryslerCitroenDodgeDongfengExeedFAWFordForthingFotonGACGMGMCGeelyGreat WallHavalHondaHongqiHyundaiInfinitiJACJaecooJaguarJeepJetourKaiyiKiaLadaLexusLi AutoLifanLincolnLivanMazdaMercedes-BenzMercuryMitsubishiNIONissanOldsmobileOmodaOpelPeugeotPlymouthPontiacRenaultSWMSaturnSkodaSkywellSubaruSuzukiTankToyotaVolkswagenVolvoVoyahXPengZeekrZotye

FAQ

What does the P01DB code mean?

P01DB is an OBD-II diagnostic trouble code that indicates: Cylinder 9 Injection Timing Performance - Over Retarded

What causes a P01DB error code?

The most common causes of P01DB include: Wear or malfunction of the 9th cylinder injector; Low fuel pressure in the 9th cylinder circuit; Clogged fuel filter; Problems with the wiring harness or contacts to the cylinder 9 injector.

How do I fix a P01DB diagnostic trouble code?

To fix P01DB: Read fault codes and freeze frame data to determine the error conditions.. Check the condition and performance of the 9th cylinder injector on the stand.. Check the fuel rail pressure and high pressure pump performance.. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with P01DB?

Do not drive — repair immediately

How much does it cost to fix P01DB?

The estimated repair cost for P01DB is $111–444. Actual cost depends on your vehicle, location, and labor rates.

FRDEESPT

See also: Russian version · NationStat