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Golf VII · 1.2 TSICurrent vehicle

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Volkswagen Golf VII1.2 TSI · 77 kW

Engine code CJZA
Production 2012–2015
6-speed manual
Drivetrain FWD
Configuration: VIN decoded

Engine code CJZAProduction 2012–20156-speed manualDrivetrain FWDConfiguration: VIN decodedConfiguration: VINVIN decoded

Overview
Parts
Procedures
Torque
Fluids
Maintenance
Diagnostics
Wiring
Specs
Bulletins
Locations
Connectors
Sources

Overview
Parts
Procedures
Torque
Fluids
Maintenance
Diagnostics
Wiring
Specs
Bulletins
Locations
Connectors
Sources

MoreMore

OverviewOverviewPartsPartsProceduresProceduresTorqueTorqueFluidsFluidsMaintenanceMaintenanceDiagnosticsDiagnosticsWiringWiringSpecsSpecsBulletinsBulletinsLocationsLocationsConnectorsConnectorsSourcesSources

ExampleExample data, not a real vehicle

Overview
Parts
Procedures
Torque
Fluids
Maintenance
Diagnostics
Wiring
Specs
Bulletins
Locations
Connectors
Sources

Diagnostics
Engine control

P0128, Coolant thermostat (coolant temperature below thermostat regulating temperature)

Coolant thermostat (coolant temperature below thermostat regulating temperature)

Severity: LowExample

Module: Engine control
Type: Generic (SAE)
Applicability: Check applicability
Source: Codes · P0128

Conditions for setting Placeholder: engine running, fault present for the debounce time.

Generic definition only: applicability unresolved

Generic SAE definition only: the example library does not confirm this code for this engine control module.

Manufacturer codes

NOTE

Generic definition only: manufacturer-specific setting conditions are not in the example data.

Diagnostic steps

Preliminary checks. There is no guided test for this code in the example data.

Example

Preliminary checks

Read and note all stored codes and freeze-frame data.
Check the relevant connectors and harness visually.
Clear the codes and repeat the conditions for setting.
Work through the possible causes in order.

The related wiring and procedures are listed belowalongside.

Possible causes

In the order the source lists them, with no likelihoods.

Example

Thermostat stuck open
Coolant temperature sensor out of range
Low coolant level

Wiring

No wiring link for this code in the example data.

Procedures

Coolant: drain and fill1 h 15 min · 6 steps

Service bulletins

No bulletin mentions this code.

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