P04B7 Volvo P1800 OBD Code

OBD/2 P04B7 error code description and symptoms.

Catalytic converters must be warm before they can work properly. On a cold start the PCM provides a rich mixture to keep the cold engine running.
All that extra fuel goes into the catalytic converter. But the exhaust isn't very hot, because, ah, the engine is pretty cold. GM has employed several strategies to fire up the catalytic converter quicker and reduce cold start emissions. One way is to use a secondary air pump that pumps outside air directly into the catalytic converter.

Gear changes are accomplished by a command from the TCM to energize the clutch actuator to release the clutch; after which various actuators inside the transmission disengage the current gear, and depending on current operating conditions, engage the next higher or lower gear ratio. All of this happens much faster than a human driver could change gears, and in most applications, gear changes are as smooth and seamless as on any fully automatic transmission.

P04B7 Volvo P1800 Error Code Repair Process :

If your a/c refrigerant temperature circuit high check engine light is illuminated, it's best to take it in for diagnostic testing, which can feel like a hassle. Because while the lights vary in appearance from vehicle to vehicle, all have the same basic meaning: There's a problem with the car's emissions system. The on-board diagnostics system P04B7 and engine control unit are in charge of monitoring a bunch of different a/c refrigerant temperature circuit high, and if they get a reading that's a little out of whack, up pops the check engine light.

Common Causes of Volvo P1800 P04B7 OBD2 Code

A common cause of code P04B7 is the failure of A/C Refrigerant Temperature Circuit High, but there are several other possible causes as well, such as ;

Dirty Oil
EVAP system hose leaking
Dirty Oil
Incorrect fuel filler cap used

P04B7 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.

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P04B7 Volvo P1800 OBD Code

P04B7 Volvo P1800 Error Code Repair Process :

Common Causes of Volvo P1800 P04B7 OBD2 Code

P04B7 code for other Volvo cars