P1293: High Side Open Bank 1 (Right)
P1293 indicates an open circuit in the high side driver for the fuel injectors or ignition coils on Bank 1 (right side of the engine). This typically means the power supply wire from the ECM to the injectors/coils is broken or the driver inside the ECM has failed. The engine may run rough, misfire, or stall due to lack of fuel or spark on that bank.
01. Most Common Causes
- Open or shorted wiring in the high side circuit
- Failed ECM internal driver
- Corroded or loose connector at ECM or injector/coil
- Blown fuse or relay for injector/coil power
02. Symptoms You Will Notice
- Engine misfire on Bank 1
- Rough idle or hesitation
- Check Engine Light on
- Possible no-start condition
03. Step-by-Step Diagnosis
Step 1: Scan for codes and verify P1293 is present.
Step 2: Visually inspect wiring and connectors for Bank 1 injectors/coils for damage or corrosion.
Step 3: Use a multimeter to check for continuity and voltage at the high side circuit.
Step 4: Test the ECM output by backprobing the connector with a test light or scope.
Step 5: If wiring is good, suspect ECM failure and perform further ECM diagnostics.
04. Commonly Affected Makes
05. Frequently Asked Questions
Is it safe to drive with this code?▼
No, driving with P1293 can cause severe engine damage due to misfiring or stalling. Have it repaired immediately.
How much does it cost to fix?▼
Repair costs range from $50 to $150 for wiring repairs, but ECM replacement can cost $500-$1000.