What Does P1213 Mean?
P1213 indicates an open or short circuit in the fuel injector circuit for cylinder #6. The ECM has detected an electrical fault preventing proper fuel delivery to cylinder 6, whether from a broken wire, bad connector, or failed injector. This will produce a persistent misfire on cylinder 6 with associated rough running, power loss, and elevated emissions.
Common Causes
30%
Failed fuel injector on cylinder 6 with open or shorted coil
25%
Damaged or corroded wiring in the cylinder 6 injector harness
20%
Poor connection at the cylinder 6 injector electrical connector
15%
ECM injector driver circuit failure for cylinder 6 output
10%
Wire chafing or heat damage to the harness near the rear of the engine
Diagnostic Steps
1
Review freeze frame data and check for companion P0306 misfire code to confirm cylinder 6 is the affected cylinder.
2
Measure the cylinder 6 injector resistance and compare to factory specification and other cylinder injector readings.
3
Inspect the cylinder 6 injector connector for corrosion, heat damage, loose terminals, or signs of previous repair attempts.
4
Perform continuity and insulation tests on the wiring from the ECM injector driver pin to the cylinder 6 injector connector.
5
Use a noid light or oscilloscope to verify the ECM is providing the correct injector pulse signal at the cylinder 6 connector.
6
Swap the cylinder 6 injector with another cylinder to determine if the fault follows the component or remains at the circuit.
Estimated Repair Cost
$150 - $650
Parts + labor, varies by vehicle and location
P1213 indicates an open or short circuit in the fuel injector circuit for cylinder #6. The ECM has detected an electrical fault preventing proper fuel delivery to cylinder 6, whether from a broken wire, bad connector, or failed injector. This will produce a persistent misfire on cylinder 6 with asso...
The most common cause of P1213 (Injector Circuit Open / Shorted - Cylinder #6) is: Failed fuel injector on cylinder 6 with open or shorted coil
Typical repair costs for P1213 range from $150 to $650, depending on the vehicle, location, and whether you do it yourself or go to a shop.
A dead cylinder reduces engine power and smoothness. Unburned fuel from the misfiring cylinder will overheat the catalytic converter over time, risking converter failure and potential fire hazard.
Start by connecting an OBD2 scanner to read the code and any freeze frame data. Then follow the diagnostic steps specific to P1213 to identify the root cause.
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Quick Info
Category
Powertrain
System
Fuel Injection System
Difficulty
Type
Manufacturer
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