U0438 Opel Insignia OBD Code

OBD/2 U0438 error code description and symptoms.

Engine Coolant Temperature (ECT) Circuit High Input Indicates the sensor signal is greater than Self-Test maximum. The ECT sensor maximum is 4.6 volts or -50 C (-58 F). Note on some vehicles that are not equipped with an ECT sensor, CHT can be used and can set this DTC. Open circuit in harness Sensor signal short to power Damaged PCM Improper harness connection Damaged sensor ECT V PID reading greater than 4.6 volts with key ON and engine OFF or during any engine operating mode indicates a hard fault.

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.

U0438 Opel Insignia Error Code Repair Process :

The rule of U0438 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 exhaust gas recirculation circuit range/performance. Likewise, overriding the OBD U0438 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 Opel Insignia U0438 OBD2 Code

A common cause of code U0438 is the failure of Exhaust Gas Recirculation Circuit Range/Performance, but there are several other possible causes as well, such as ;

Engine Control Module (ECM)
Faulty Crankshaft Position Sensor (POS)
Faulty Fuel injector
Air fuel ratio (A/F) Sensor 1 Bank 1 circuit poor electrical connection

U0438 is a kind of Network Trouble Code

U-code indicates that engine communication errors and shows lost communication with engine parts.U-Codes are fairly straight forward, given all of the articles and technical publications that have been written regarding these problematic codes. In most cases, it just comes down to identifying the module that isn't communicating with the other modules on the CAN bus line for whatever reason.

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

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U0438 Opel Insignia OBD Code

U0438 Opel Insignia Error Code Repair Process :

Common Causes of Opel Insignia U0438 OBD2 Code

U0438 code for other Opel cars