Cold Start Injector 1
Diagnostic trouble code P0213 indicates that the powertrain control module (PCM) has detected an electrical malfunction in the cold start injector 1 circuit. The PCM sets this code when the voltage or resistance in the cold start injector circuit falls outside of the expected manufacturer specifications during a cold engine startup.
While the vehicle will typically still drive once warmed up, a faulty cold start injector can cause significant starting difficulties in cold weather. It should be diagnosed soon to prevent excessive cranking wear on the starter and battery.
Common symptoms
- Hard starting or extended cranking when the engine is cold
- Illuminated Check Engine Light
- Rough idling or stalling immediately after a cold start
- Engine hesitation or stumbling during cold acceleration
- Decreased fuel economy due to improper fuel mixture
Likely causes
- Faulty cold start fuel injector
- Corroded, damaged, or loose wiring and connectors in the injector circuit
- Defective Engine Coolant Temperature (ECT) sensor providing inaccurate data
- Faulty cold start injector relay or blown fuse
- Vacuum leak affecting the cold start fuel mixture
- Malfunctioning Powertrain Control Module (PCM) (rare)
What to check before replacing parts
Inspect the wiring and connectors for the cold start injector.
Look for: Look for frayed wires, corrosion, or loose connections that could cause an open or short circuit.
Test the Engine Coolant Temperature (ECT) sensor using a scan tool.
Look for: Look for temperature readings that do not match the actual engine temperature, which can prevent the PCM from properly commanding the cold start injector.
Measure the resistance of the cold start injector with a digital multimeter.
Look for: Look for a resistance value that falls outside the manufacturer's specified range, indicating an internal electrical failure of the injector coil.
Check for proper voltage and ground at the cold start injector harness connector during a cold crank.
Look for: Look for a lack of voltage or ground, which points to a wiring issue, blown fuse, or faulty relay upstream of the injector.
Perform a fuel pressure and leak-down test on the cold start injector.
Look for: Look for an injector that fails to spray when commanded or leaks fuel when closed, indicating a mechanical failure.
This page explains the generic P0213 definition and is general reference information, not a diagnosis for your specific vehicle. Actual causes, severity, and repairs vary by make, model, engine, and mileage — always confirm with a scan tool and a qualified technician before replacing parts.
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