Injector Correction Circuit Malfunction
Table of contents
P1601 TOYOTA Possible Causes
- Injector compensation code
- Faulty Engine Control Module (ECM)
How do I fix code P1601 TOYOTA?
Check the “Possible Causes” listed above. Visually inspect the related wiring harness and connectors. Check for damaged components and look for broken, bent, pushed out, or corroded connector’s pins.
Tech Notes
- Information from user: P1601 often happens on Euro 5 spec’d Toyota Hilux and Hiace Vans fitted with the 1KD-FTV or 2KD-FTV engine after the injectors have been replaced (Re-Coded). This is because the PCM has a known learned value for Pilot Injection Quantities stored, but it has now also been told that new injectors have been installed. In order to fix this issue a Scantool is required to Reset the Pilot Quantity Learned Values. This issue is unique to Euro 5 spec’d vehilce’s, typically with the part number 295050-0460__ fitted Injectors.
Cost of diagnosing the P1601 TOYOTA code
The cost of diagnosing the P1601 TOYOTA code is 1.0 hour of labor. The auto repair labor rates vary by location, your vehicle’s make and model, and even your engine type. Most auto repairs shops charge between $75 and $150 per hour.
Possible Symptoms
- Engine Light ON (or Service Engine Soon Warning Light)
P1601 TOYOTA Description
When replacing the Engine Control Module (ECM) with a new one, input all the injector’s compensation codes into the new ECM.