C0551 Toyota Aristo OBD Code

OBD/2 C0551 error code description and symptoms.

The Transmission Range Sensor (also referred to as the PRNDL input an/or neutral safety switch) tells the transmission control module (TCM) an the engine control module (PCM) that the transmission is in park, reverse, neutral, drive, low, 2nd, 3rd etc. It is attached directly to the manual valve of transmission, so when the shift lever is moved from park to drive, the Transmission Range Sensor communicates this critical information to the above mentioned vehicle control module systems.

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.

C0551 Toyota Aristo Error Code Repair Process :

For unable to confirm unlock condition check engine light is perhaps the most troubling of lights because it could mean so many different things, from you didn't screw the gas cap on tightly enough to look out for pistons flying through the hood and into the stratosphere. The easiest way to find out what this light is telling you is to hook your vehicle up to a scan tool. C0551 error code diagnostic tool looks a little like an oversized calculator and plugs into a communication port inside the car. After you instruct it to perform the scan, it speaks unable to confirm unlock condition with your car's computers to find out exactly what's prompting the light to turn on.

Common Causes of Toyota Aristo C0551 OBD2 Code

A common cause of code C0551 is the failure of Unable to confirm Unlock Condition, but there are several other possible causes as well, such as ;

Air fuel ratio (A/F) Sensor 1 Bank 1 harness is open or shorted
Camshaft advance mechanism binding (VCT unit)
Faulty Variable Camshaft Timing (VCT) position solenoid
Open circuits caused by damage to wiring.

C0551 is a kind of Chassis Trouble Code

Diagnosing chassis noises can be one of the most frustrating problems technicians face. Fortunately, manufacturers have engineered noise, vibration and harshness (NVH) diagnostic techniques and equipment to find the source of the noise.

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

About Us | Contact | Privacy

C0551 Toyota Aristo OBD Code

C0551 Toyota Aristo Error Code Repair Process :

Common Causes of Toyota Aristo C0551 OBD2 Code

C0551 code for other Toyota cars