What Does P1301 Mean?
The PCM has detected multiple low-side short circuits in the Bank 2 fuel injector control circuits. Similar to P1295 but affecting the opposite cylinder bank, this indicates ground circuit shorts on Bank 2 injectors.
Safety Warning
Engine will run very poorly or fail to start. Vehicle may stall suddenly while driving. Do not operate until repaired.
Common Causes
40%
Chafed or damaged wiring harness causing short to ground
25%
Failed fuel injector with internal short to ground
20%
Corroded or damaged injector connector with moisture intrusion
10%
Oil or coolant contamination in connectors causing shorts
5%
Failed PCM low-side driver circuit
Diagnostic Steps
1
Step 1: Disconnect all Bank 2 fuel injectors and inspect connectors for damage, oil, or coolant contamination
2
Step 2: Measure resistance from each injector control wire to ground with injectors disconnected (should read infinite/open)
3
Step 3: Visually inspect Bank 2 wiring harness for chafing, especially where it crosses engine components
4
Step 4: Test each Bank 2 injector coil for shorts to ground using digital multimeter
5
Step 5: If wiring and injectors are good, perform PCM pinpoint test for driver circuit shorts
Estimated Repair Cost
$150 - $1,500
Parts + labor, varies by vehicle and location
The PCM has detected multiple low-side short circuits in the Bank 2 fuel injector control circuits. Similar to P1295 but affecting the opposite cylinder bank, this indicates ground circuit shorts on Bank 2 injectors.
The most common cause of P1301 (Multi-faults - Bank 2 - With Low Side Shorts) is: Chafed or damaged wiring harness causing short to ground
Typical repair costs for P1301 range from $150 to $1,500, depending on the vehicle, location, and whether you do it yourself or go to a shop.
Engine will run very poorly or fail to start. Vehicle may stall suddenly while driving. Do not operate until repaired.
Start by connecting an OBD2 scanner to read the code and any freeze frame data. Then follow the diagnostic steps specific to P1301 to identify the root cause.
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Quick Info
Category
Powertrain
System
Fuel Injection System
Difficulty
Type
Manufacturer
Recommended Tools
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