P1297 - High Sides Shorted Together
The P1297 code indicates that the engine control module (ECM) has detected a short circuit between two or more high-side driver circuits. High-side drivers are responsible for controlling various actuators such as fuel injectors, ignition coils, or solenoids. When these circuits are shorted together, it can cause multiple components to malfunction simultaneously, leading to drivability issues. This condition often results from damaged wiring, corroded connectors, or a faulty ECM.
1. Symptoms You Will Notice
- Check Engine Light illuminated
- Engine misfire or rough running
- Multiple actuators not functioning (e.g., injectors, coils)
- Reduced engine performance or stalling
2. Most Common Causes
- Damaged or chafed wiring harness causing shorts between high-side circuits
- Corroded or loose connectors at the ECM or actuator
- Faulty ECM with internal short
- Water intrusion into the ECM or connectors
3. Step-by-Step Diagnosis
Step 1: Use a scan tool to retrieve all stored codes and freeze frame data.
Step 2: Visually inspect the wiring harness and connectors for damage, corrosion, or pinched wires.
Step 3: Perform a resistance test between high-side driver circuits to identify shorts.
Step 4: Check for water intrusion in the ECM and connectors; dry and clean if necessary.
Step 5: If wiring is intact, test the ECM output signals; replace ECM if faulty.
4. Frequently Asked Questions
Is it safe to drive with this code?▼
No, it is not safe. The short can cause erratic engine behavior, stalling, or damage to the ECM and other components. Have the vehicle towed to a repair shop.
How much does it cost to fix?▼
The cost ranges from $150 to $400, depending on the cause. Wiring repairs are cheaper, while ECM replacement is more expensive.
5. Commonly Affected Makes
This is a manufacturer-specific code. The exact manufacturer is not confirmed in our current database.