C1604 Alfa Romeo 145 OBD Code

OBD/2 C1604 error code description and symptoms.

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.

At this point we are assuming that the fuses and relays are good. You will need to locate the PCM/TCM and the power input signal circuit using your vehicle information source. Unplug the connector from the PCM/TCM, place the ignition switch in the ON position, and probe the appropriate circuit with the positive test lead of the DVOM.

C1604 Alfa Romeo 145 Error Code Repair Process :

The rule of C1604 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 scp (j1850) invalid or missing data for function read vehicle speed. Likewise, overriding the OBD C1604 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.

Common Causes of Alfa Romeo 145 C1604 OBD2 Code

A common cause of code C1604 is the failure of SCP (J1850) Invalid or Missing Data for Function Read Vehicle Speed, 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 circuit poor electrical connection
EVAP canister or fuel tank leaks
Faulty Camshaft Position Sensor

C1604 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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C1604 Alfa Romeo 145 OBD Code

C1604 Alfa Romeo 145 Error Code Repair Process :

Common Causes of Alfa Romeo 145 C1604 OBD2 Code

C1604 code for other Alfa cars