P1842 Trouble Code

View P1842 obd/2 error code description and symptoms. P1842 engine photo

Variable Cam Timing Over-advanced (Bank 1) The comprehensive component monitor (CCM) monitors the VCT position for an over-advanced camshaft timing.
The test fails when the camshaft timing exceeds a maximum calibrated value or remains in an advanced position. Cam timing improperly set No oil flow to the VCT piston chamber Low oil pressure VCT solenoid valve stuck closed Camshaft advance mechanism binding (VCT unit) P1842 DTC is a check of the VCT unit.

One example of this would be when an automatic vehicle in placed in gear. To prevent the added drag from the torque converter and transmission from reducing the idling speed, the PCM will command the idle control valve to allow more air to enter the engine, while at the same time, adjusting the injector pulse width to inject more fuel to suit the increased amount of air. Note that the idle air control valve is closed by the PCM when the throttle plate is opened to prevent excess air from entering the engine.

P1842 Error Code Repair Process :

If your vehicle failed a P1842 test and the P1842 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 p1842 transmission transfer case differential lock-up feedback switch circuit failure 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 p1842 transmission transfer case differential lock-up feedback switch circuit failure: 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.

P1842 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.

Common Causes of P1842

A common cause of code P1842 is the failure of P1842 Transmission Transfer Case Differential Lock-Up Feedback Switch Circuit Failure, but there are several other possible causes as well, such as ;

Camshaft advance mechanism binding (VCT unit)
Faulty Variable Camshaft Timing (VCT) position solenoid
Exhaust gas leaks
Clogged or faulty fuel injector (s)

P1842 code for all cars

You can view according P1842 DTC for your car model. We selected several models to see obd2 solutions click and view it.

+P1842 Volkswagen Vento

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

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