C1257 Nissan Navara OBD Code

OBD/2 C1257 error code description and symptoms.

The Throttle Position sensor signals the Engine Control Module as to the current position of the engine throttle valve.
The current throttle valve opening is based on the driver's input from the gas pedal. The ECM uses the information from this sensor to help calculate fuel delivery and spark timing.

To check for an open circuit, trace along the length of the transmission control circuit, checking for breaks in the wiring. Repair any broken wiring and make sure all connectors are fully seated and locked.Pay close attention to connectors, looking for corrosion, bent or broken pins, or moisture in the connector. Repair any connector issues even if they are not specifically part of the transmission control circuit as they may serve a function in providing power to the transmission control circuit.

C1257 Nissan Navara Error Code Repair Process :

If your vehicle failed a C1257 test and the C1257 Check Engine Light is NOT on, chances are you have a problem with the OBDII system, a burned out MIL lamp, or a faulty catalytic converter. The converter is essentially an afterburner that cleans up the exhaust after it exits the engine. The OBDII system uses c1257 abs inlet valve coil rr circuit short to ground a ownstream oxygen sensor to monitor the efficiency of the converter, and it should detect a drop in converter efficiency if the converter has been contaminated or is failing (ignition misfiring, leaky exhaust valves, and oil burning can all damage the converter). What you want to look c1257 abs inlet valve coil rr circuit short to ground: Any conditions that might cause ignition misfire, an overly rich or lean fuel condition, or loss of compression. Use your OBD Express DIY to look at the oxygen sensor outputs, coolant temperature, airflow, calculated engine load, and inlet air temperature.

Common Causes of Nissan Navara C1257 OBD2 Code

A common cause of code C1257 is the failure of C1257 ABS Inlet Valve Coil RR Circuit Short To Ground, but there are several other possible causes as well, such as ;

Damaged ECM
Air fuel ratio (A/F) Sensor 1 Bank 1 harness is open or shorted
Fuel injectors may be faulty
Ignition coils circuit poor electrical connection

C1257 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.

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C1257 Nissan Navara OBD Code

C1257 Nissan Navara Error Code Repair Process :

Common Causes of Nissan Navara C1257 OBD2 Code

C1257 code for other Nissan cars