SYS.OK|MANUAL.DB● LIVE
HOMESERVICE MANUALSINFINITI2019Q70 3.7 LUXE, AWDREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT VARIANT/TRIMSECTION 2 (ENGINE CONTROL SYSTEM (5.6L) (DTC/CIRCUIT DIAGNOSIS) (2 OF 9))DTC/CIRCUIT DIAGNOSISDTC P0122, P0123, P0227, P0228: TP SENSORDTC LOGICDTC DETECTION LOGIC
2019 Infiniti Q70 3.7 Luxe, AWD

DTC Detection Logic

2019 Infiniti Q70 3.7 Luxe, AWDSECTION DTC Detection Logic
WARNING: This page is about a different variant/trim than selected.
NOTE: If DTC P0122, P0123, P0227 or P0228 is displayed with DTC P0643, first perform the trouble diagnosis for DTC P0643. Refer to DTC Logic .

DTC No.

Trouble diagnosis name

(Trouble diagnosis content)

DTC detecting condition

Possible cause

P0122

TP SEN 2/CIRC-B1

[Throttle position sensor 2 (bank 1) circuit low input]

An excessively low voltage from the TP sensor 2 is sent to ECM.
  • Harness or connectors

    [TP sensor 2 (bank 1 or 2) circuit is open or shorted.]

    (EOP sensor circuit is shorted.)

    (Fuel rail pressure sensor circuit is shorted.)

    (Power steering pressure sensor circuit is shorted.)

    (Refrigerant pressure sensor circuit is shorted.)

    (Manifold absolute pressure sensor circuit is shorted.)

    (Battery current sensor circuit is shorted.)

    [Camshaft position sensor (bank 2) circuit is shorted.]

    [Exhaust valve timing control position sensor (bank 2) circuit is shorted.]

    (Accelerator pedal position sensor 2 circuit is shorted.)

  • TP sensor 2 (bank 1 or 2)
  • EOP sensor
  • Fuel rail pressure sensor
  • Power steering pressure sensor
  • Refrigerant pressure sensor
  • Manifold absolute pressure sensor
  • Battery current sensor
  • Camshaft position sensor (bank 2)
  • Exhaust valve timing control position sensor (bank 2)
  • Accelerator pedal position sensor 2

P0123

TP SEN 2/CIRC-B1

[Throttle position sensor 2 (bank 1) circuit high input]

An excessively high voltage from the TP sensor 2 is sent to ECM.

P0227

TP SEN 2/CIRC-B2

[Throttle position sensor 2 (bank 2) circuit low input]

An excessively low voltage from the TP sensor 2 is sent to ECM.

P0228

TP SEN 2/CIRC-B2

[Throttle position sensor 2 (bank 2) circuit high input]

An excessively high voltage from the TP sensor 2 is sent to ECM.
RENDER: 1.0x

NO RELATED

Recommended Tools & Savings

Use the Manual With the Right Hardware

Pair factory procedures with proven DIY tools so the instructions are easier to execute.

Affiliate disclosure: We may earn a commission at no extra cost to you.

Shop Manual-Ready ToolsFree Quote CheckQuote Shield Pro

When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • • You smell fuel, burning insulation, or see smoke.
  • • Brakes feel soft, pull hard to one side, or make grinding noises.
  • • The engine overheats, stalls repeatedly, or misfires under load.
  • • You are missing required tools, torque specs, or safe lifting equipment.
  • • You are not confident in the next step or safety outcome.