P1721 Chevrolet Hhr OBD Code

OBD/2 P1721 error code description and symptoms.

The Transmission Fluid Pressure Switch allows the engine's control module (PCM) or Transmission Control Module (TCM) to use hydraulic fluid to engage the clutches in the transmission to allow for smoother shifting while driving. If the PCM or TCM detects an issue with the hydraulic clutch or the pressure switch, the PCM or TCM will set code P1721

Circuit High Input codes like P1721 are mostly caused by defective alternators that develop excessive voltages, although there may be other causes as well, such as short circuits that 'leak' current into a particular system from other, unrelated systems that work on higher voltages. Note that in the case of short circuits that leak power into a control circuit, there is likely to be other, seemingly unrelated trouble codes present along with the code(s) being investigated. Diagnosing a 'high input' code will always involve a thorough testing of the charging system as a first step, followed by measures to isolate the system from all other possible sources of power during resistance, continuity, and reference voltage tests.

P1721 Chevrolet Hhr Error Code Repair Process :

When you turn on the ignition, the Service Engine Soon or Check Engine P1721 light should flash briefly, indicating that the OBD system is ready to scan your vehicle for any malfunctions. After this brief flash, the light should stay off while you drive as long as no problems are detected. If p1721 gear 1 incorrect ratio so, you'll be glad to know that your vehicle is equipped with an early warning system that could save you time, money, and fuel in addition to helping protect the p1721 gear 1 incorrect ratio.

Common Causes of Chevrolet Hhr P1721 OBD2 Code

A common cause of code P1721 is the failure of P1721 Gear 1 Incorrect Ratio, but there are several other possible causes as well, such as ;

Continuous oil flow to the VCT piston chamber
Air fuel ratio (A/F) Sensor 1 Bank 1 circuit poor electrical connection
Fuel pressure
Camshaft Position Sensor harness is open or shorted

P1721 is a kind of Powertrain Trouble Code

Powertrain of a modern automobile, comprising engine (with exhaust system), transmission, drive shaft, suspension and the wheels. In a motor vehicle, the term powertrain or powerplant describes the main components that generate power and deliver it to the road surface, water, or air.

Engine OBD 2 Codes website is a freeware resource center for engine trouble codes.

About Us | Contact | Privacy

P1721 Chevrolet Hhr OBD Code

P1721 Chevrolet Hhr Error Code Repair Process :

Common Causes of Chevrolet Hhr P1721 OBD2 Code

P1721 code for other Chevrolet cars