What Does P1202 Mean?
The ECM has detected an open circuit or short circuit in the fuel injector wiring for cylinder #2. This prevents proper fuel delivery to that cylinder.
Common Causes
35%
Faulty fuel injector for cylinder #2
30%
Damaged or corroded injector wiring or connector
20%
Short to ground in injector circuit
15%
ECM internal injector driver circuit failure
Diagnostic Steps
1
Step 1: Inspect injector connector for corrosion, damage, or loose pins
2
Step 2: Measure resistance of fuel injector (typically 12-16 ohms)
3
Step 3: Check for voltage supply to injector with key on
4
Step 4: Use noid light or oscilloscope to verify injector pulse signal from ECM
5
Step 5: Check wiring harness for shorts to ground or other circuits
Estimated Repair Cost
$150 - $500
Parts + labor, varies by vehicle and location
The ECM has detected an open circuit or short circuit in the fuel injector wiring for cylinder #2. This prevents proper fuel delivery to that cylinder.
The most common cause of P1202 (Injector Circuit Open / Shorted - Cylinder #2) is: Faulty fuel injector for cylinder #2
Typical repair costs for P1202 range from $150 to $500, depending on the vehicle, location, and whether you do it yourself or go to a shop.
Engine will run rough, misfire, and have reduced power. Safe to drive short distances but repair soon.
Start by connecting an OBD2 scanner to read the code and any freeze frame data. Then follow the diagnostic steps specific to P1202 to identify the root cause.
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Quick Info
Category
Powertrain
System
Fuel System
Difficulty
Type
Manufacturer
Recommended Tools
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