Cause
Leaking fuel injector
An injector that does not seal when closed, so fuel enters the cylinder outside the injection event. This produces a rich condition and hard starting rather than a misfire code on its own, and fuel washing down the bore dilutes the oil. This is the injector that has stopped sealing, as distinct from the common-rail injector whose seat is wearing — that one fails in both directions at once, over-delivering while open as well as passing fuel when closed, and it is a different measurement: a leak-back comparison across the set rather than a search for one dribbling injector.
Typically a moderate job.
Some of these codes mean you should stop driving
8 of the 62 codes this can cause indicate a fault where continuing to drive risks damage or is unsafe. Which one you have matters more than the cause does — read the code's own page before deciding.
Codes this can cause (62)
Codes where this is a likely explanation first, rather than merely a possible one.
- P0087 Fuel Rail/System Pressure — Too Low Bank 1 Likely for this code Stop driving High
- P0093 Fuel System Leak Detected — Large Leak Likely for this code Stop driving Critical
- P0094 Fuel System Leak Detected — Small Leak Likely for this code Stop driving High
- P00C6 Fuel Rail Pressure Too Low - Engine Cranking Bank 1 Likely for this code High
- P0132 O2 Sensor Circuit High Voltage — Bank 1 Sensor 1 Likely for this code Moderate
- P0148 Fuel Delivery Error Likely for this code Stop driving High
- P0152 O2 Sensor Circuit High Voltage — Bank 2 Sensor 1 Likely for this code Moderate
- P0172 System Too Rich — Bank 1 Likely for this code High
- P0175 System Too Rich — Bank 2 Likely for this code High
- P0316 Engine Misfire Detected on Startup (First 1000 Revolutions) Likely for this code Moderate
- P2002 Particulate Filter Efficiency Below Threshold — Bank 1 Likely for this code High
- P2003 Particulate Filter Efficiency Below Threshold — Bank 2 Likely for this code High
- P2178 System Too Rich Off Idle Bank 1 Likely for this code Moderate
- P2180 System Too Rich Off Idle Bank 2 Likely for this code Moderate
- P2188 System Too Rich at Idle Bank 1 Likely for this code Moderate
- P2190 System Too Rich at Idle Bank 2 Likely for this code Moderate
- P2194 System Too Rich at Higher Load Bank 2 Likely for this code Moderate
- P2358 Cylinder 10 Pressure Too High Likely for this code Moderate
- P2362 Cylinder 11 Pressure Too High Likely for this code Moderate
- P2428 Exhaust Gas Temperature Too High Bank 1 Likely for this code Stop driving High
- P2429 Exhaust Gas Temperature Too High Bank 2 Likely for this code Stop driving High
- P2B00 Cylinder 1 Injection Pulse Performance Likely for this code Moderate
- P2B01 Cylinder 2 Injection Pulse Performance Likely for this code Moderate
- P2B02 Cylinder 3 Injection Pulse Performance Likely for this code Moderate
- P2B03 Cylinder 4 Injection Pulse Performance Likely for this code Moderate
Information, not instruction
CarGeek is a reference, not a service manual. Its pages are written from public sources and from what other people have found, never from a manufacturer's own service information, so they can be wrong or incomplete for your particular vehicle. Some of what they describe carries real risk: high voltage, fuel under pressure, stored energy, hot and moving parts.
Have anything you intend to act on checked by a trained person against the manufacturer's own procedure for your vehicle. Nothing here replaces that procedure.
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