When diagnosing engine problems, one of the most common codes that mechanics encounter is Subaru Code P0353. This code indicates that there is an ignition coil C primary/secondary circuit malfunction. This malfunction can cause improper idling and poor driving performance, and can be caused by a variety of issues. To better understand the causes and solutions for Subaru Code P0353, it is important to examine the underlying issues that contribute to the problem. In this article, we will provide a comprehensive overview of what causes Subaru Code P0353 and how it can be resolved.
Causes and Solutions for Subaru Code P0353
| Cause | Solution |
|---|---|
| Open circuit or short circuit to ground in harness of power supply circuit | Check wiring harness and any open circuits or shorts to ground |
| Blown out of fuse | Replace the blown fuse |
| Poor contact of IG relay connector | Clean and inspect the IG relay connector |
| Poor contact of coupling connector | Clean and inspect the coupling connector |
| Faulty IG relay | Replace the IG relay |
| Poor spark plug condition | Replace the spark plugs |
| Open circuit between ignition coil connector and engine grounding terminal | Check the connector and engine grounding terminal and repair any open circuits |
| Ground short circuit of harness between ECM connector and ignition coil connector | Check the harness, ECM connector and ignition coil connector and repair any short circuits |
| Faulty ignition coil | Replace the ignition coil |
| Faulty ECM connection | Replace the ECM connection |
When diagnosing engine problems, Subaru Code P0353 is one of the most commonly encountered codes. This code indicates an issue with the ignition coil C primary/secondary circuit and can cause improper idling and poor driving performance. To resolve Subaru Code P0353, it is important to understand the possible causes and solutions. This article provides a comprehensive overview of the causes and solutions for Subaru Code P0353, including open circuit and short circuit problems with wiring harnesses, blown fuses, poor contact of IG relay connectors, poor contact of coupling connectors, faulty IG relays, poor spark plug condition, open circuits between ignition coil connectors and engine grounding terminals, ground short circuits of harnesses between ECM connectors and ignition coil connectors, faulty ignition coils, and faulty ECM connections.
Open Circuit or Short Circuit to Ground in Harness of Power Supply Circuit
When diagnosing Subaru Code P0353, the first step is to check the wiring harness for any open circuits or shorts to ground. If an open circuit or short to ground is found, it should be repaired or replaced.
Blown Out of Fuse
If a blown fuse is found, it should be replaced with a new one. This will help to prevent the same issue from occurring again.
Poor Contact of IG Relay Connector
When diagnosing Subaru Code P0353, it is important to check the IG relay connector for poor contact. If poor contact is found, the connector should be cleaned and inspected to ensure proper connection.
Poor Contact of Coupling Connector
The coupling connector should also be checked for poor contact when diagnosing Subaru Code P0353. If poor contact is found, the connector should be cleaned and inspected for proper connection.
Faulty IG Relay
If the IG relay is found to be faulty, it should be replaced with a new one. This will help to prevent the same issue from occurring again.
Poor Spark Plug Condition
When diagnosing Subaru Code P0353, it is important to check the spark plugs for poor condition. If poor condition is found, the spark plugs should be replaced.
Open Circuit Between Ignition Coil Connector and Engine Grounding Terminal
When diagnosing Subaru Code P0353, it is important to check the connector and engine grounding terminal for any open circuits. If any open circuits are found, they should be repaired.
Ground Short Circuit of Harness Between ECM Connector and Ignition Coil Connector
It is also important to check the harness, ECM connector, and ignition coil connector for any ground short circuits. If any short circuits are found, they should be repaired.
Faulty Ignition Coil
If the ignition coil is found to be faulty, it should be replaced with a new one. This will help to prevent the same issue from occurring again.
Faulty ECM Connection
If the ECM connection is found to be faulty, it should be replaced with a new one. This will help to prevent the same issue from occurring again.
Conclusion: Resolving Subaru Code P0353
Subaru Code P0353 can be a frustrating problem for many drivers. To resolve this issue, it is important to understand the possible causes and solutions. This article provides a comprehensive overview of the causes and solutions for Subaru Code P0353, including open circuit and short circuit problems with wiring harnesses, blown fuses, poor contact of IG relay connectors, poor contact of coupling connectors, faulty IG relays, poor spark plug condition, open circuits between ignition coil connectors and engine grounding terminals, ground short circuits of harnesses between ECM connectors and ignition coil connectors, faulty ignition coils, and faulty ECM connections. By following the steps outlined in this article, drivers can effectively resolve Subaru Code P0353 and restore their engine’s performance.