Cold Start Injector 1
Fault detected on cold start injector 1 (auxiliary injector for cold engine starting on some older systems). A flow-deviating injector throws off cylinder balance — adjacent cylinders run leaner/richer to compensate, often masking the root cause until the trim limit is hit.
Affected components
- Cold start injector 1
Common causes
- High likelihood: Cold start injector failed
Diagnostic notes
- The malfunction indicator lamp may illuminate
- This code can affect emissions
Sources
Diagnostic information is provided for reference only. Confirm the code with a compatible scan tool and follow the vehicle manufacturer's service procedures before replacing components.