C1674 Trouble Code

View C1674 obd/2 error code description and symptoms. C1674 engine photo

Output Shaft Speed sensor circuit intermittent failure The output shaft speed sensor signal to the PCM is irregular or interrupted.
Harness connector not properly seated Harness intermittently shorted, or open Harness connector damaged OSS sensor damaged, or not installed properly Verify harness and connector integrity Verify OSS sensor proper installation.

As the engine heats up and combustion becomes easier and more complete, the PCM will command the idling control valve to increase the amount of air entering the engine to suit the changing conditions. However, when the load on the engine changes, say, when some electrical consumers or other systems are either turned on or off, the PCM adapts the signal voltage to the idle control valve to ensure that the idling speed remains stable, and at the RPM specified by the manufacturer.

C1674 Error Code Repair Process :

The rule of C1674 code when it comes to emissions-related vehicle repair is that any modification that changes the vehicle from a certified configuration to a non-certified configuration is considered tampering: this applies to both vehicle owners and repair facilities and is, therefore, a Federal offense. Replacing a catalyst with a straight pipe is one traditional example of o2 sensor circuit high voltage (bank 1 sensor 1). Likewise, overriding the OBD C1674 error in system through the use of high-tech defeat devices or non-certified computer chips, for example, would also be considered tampering. The OBD system may, however, be repaired back to its original certified configuration with certified performance chips or appropriate aftermarket parts.

C1674 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.

Common Causes of C1674

A common cause of code C1674 is the failure of O2 Sensor Circuit High Voltage (Bank 1 Sensor 1), but there are several other possible causes as well, such as ;

Camshaft Position Sensor harness is open or shorted
Air fuel ratio (A/F) Sensor 1 Bank 1 harness is open or shorted
Air fuel ratio (A/F) Sensor 1 Bank 1 harness is open or shorted
Fuel pressure

C1674 code for all cars

You can view according C1674 DTC for your car model. We selected several models to see obd2 solutions click and view it.

+C1674 Daf Marathon

+C1674 Rolls-royce Silver

+C1674 Mercury Antser

+C1674 Alvis Crested Eagle

+C1674 Italdesign Twenty

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

About Us | Contact | Privacy