What Does P0207 Mean?
This code indicates a malfunction in the fuel injector circuit for cylinder 7. The ECM has detected an electrical fault in the cylinder 7 injector driver circuit. This code applies to V8, V10, and V12 engines. The cylinder 7 injector is not receiving proper drive signals, causing that cylinder to misfire.
Common Causes
35%
Failed cylinder 7 fuel injector with open or shorted internal solenoid coil
30%
Damaged wiring or poor connector contact at the cylinder 7 injector, common on V8 rear cylinders where harness access is limited
20%
ECM internal driver failure for the cylinder 7 injector output channel
15%
Power supply circuit fault at the injector harness feed for the bank containing cylinder 7
Diagnostic Steps
1
Step 1: Measure cylinder 7 injector coil resistance with connector disconnected. Typical specification is 11-17 ohms for high-impedance injectors.
2
Step 2: Verify 12V power at the injector connector. On V8 engines, cylinder 7 is typically on the driver-side rear, sharing a power feed branch with adjacent cylinders.
3
Step 3: Use a noid light to confirm ECM pulse delivery to the cylinder 7 connector during cranking.
4
Step 4: Swap the cylinder 7 injector with cylinder 5 or 8 (same bank) to determine if the fault follows the component or stays at the wiring position.
5
Step 5: Inspect the harness routing to cylinder 7, which on many V8 engines runs under or behind the intake manifold where heat and access issues cause wire deterioration.
Estimated Repair Cost
$160 - $700
Parts + labor, varies by vehicle and location
This code indicates a malfunction in the fuel injector circuit for cylinder 7. The ECM has detected an electrical fault in the cylinder 7 injector driver circuit. This code applies to V8, V10, and V12 engines. The cylinder 7 injector is not receiving proper drive signals, causing that cylinder to mi...
The most common cause of P0207 (Injector Circuit Malfunction - Cylinder 7) is: Failed cylinder 7 fuel injector with open or shorted internal solenoid coil
Typical repair costs for P0207 range from $160 to $700, depending on the vehicle, location, and whether you do it yourself or go to a shop.
A dead cylinder 7 on a V8 causes rough running, reduced power, and catalytic converter risk from unburned fuel. On large displacement engines, the power loss may be less noticeable but the converter damage potential remains.
Start by connecting an OBD2 scanner to read the code and any freeze frame data. Then follow the diagnostic steps specific to P0207 to identify the root cause.
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Quick Info
Category
Powertrain
System
Fuel Injection System
Difficulty
Type
Generic (SAE)
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