The P2291 code is a diagnostic trouble code (DTC) that indicates the injector control pressure is too low while the engine is cranking. This code is often associated with issues in the oil pressure that controls the fuel injectors, which are critical for the engine’s performance.
What Does the P2291 Code Mean?
OBD-II Code P2291 is defined as Injector Control Pressure Too Low – Engine Cranking. This means that the Engine Control Module (ECM) or Powertrain Control Module (PCM) has detected that the pressure in the fuel injection system is insufficient to operate the fuel injectors properly. The PCM continuously monitors the pressure during engine operation, and a low reading will trigger this code.
What Causes the P2291 Code?
Several factors can trigger the P2291 code, including:
- Engine oil level is too low
- High pressure oil pump failure
- Injector Control Pressure (ICP) sensor failure
- Wiring issues related to the ICP sensor
What Are the Symptoms of the P2291 Code?
Drivers may experience the following symptoms when the P2291 code is present:
- Engine may not start
- Engine may stall
How Serious Is the P2291 Code?
The P2291 code is classified as an urgent issue. It indicates a significant malfunction that can lead to severe engine damage if not addressed promptly. Ignoring this code may result in additional problems, affecting both vehicle safety and performance.
How to Diagnose the P2291 Code
Proper diagnosis of the P2291 code involves the following steps:
- Check the engine oil level and condition.
- Inspect the high-pressure oil pump for proper operation.
- Examine the Injector Control Pressure sensor and its wiring for defects.
- Use a scan tool to confirm the presence of the code and any related codes.
Common Repairs for the P2291 Code
Repairs for the P2291 code may include:
- Oil and filter change
- Oil pump replacement
How Much Does It Cost to Fix the P2291 Code?
The cost to fix the P2291 code can vary significantly depending on the underlying cause. Simple oil changes may cost less than $100, while replacing a high-pressure oil pump could range from $500 to $1,500, depending on the vehicle make and model.
Can I Fix the P2291 Code Myself?
While some basic diagnostics and repairs, like checking oil levels or changing the oil filter, can be performed by a knowledgeable car owner, more complex issues such as high-pressure oil pump replacement or electrical repairs should be handled by a professional mechanic to ensure proper resolution of the issue.
