P1078 Infiniti Code - Exhaust Valve Timing Control Position Sensor Bank 1 Circuit
Quick Answer
Exhaust valve timing control position sensor detects the concave groove of the exhaust camshaft rear end. Common causes include Faulty Exhaust Valve Timing Control Position Sensor Bank 1, Exhaust Valve Timing Control Position Sensor Bank 1 harness is open or shorted, Exhaust Valve Timing Control Position Sensor Bank 1 circuit poor electrical connection. Severity is High - diagnose this code as soon as possible. Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
- What it means
- P1078 Infiniti indicates Exhaust Valve Timing Control Position Sensor Bank 1 Circuit.
- Common causes
- Common causes include Faulty Exhaust Valve Timing Control Position Sensor Bank 1, Exhaust Valve Timing Control Position Sensor Bank 1 harness is open or shorted, Exhaust Valve Timing Control Position Sensor Bank 1 circuit poor electrical connection.
- Severity
- High - diagnose this code as soon as possible.
- Can I drive?
- Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
Code P1078 Infiniti Description
This sensor signal is used for sensing a position of the exhaust camshaft.
This sensor uses a Hall IC.
Based on the position of the exhaust camshaft, ECM controls exhaust valve timing control magnet retarder to optimize the shut/open timing of exhaust valve for the driving condition.
What are the Possible Causes of the DTC P1078 Infiniti?
- Faulty Exhaust Valve Timing Control Position Sensor Bank 1
- Exhaust Valve Timing Control Position Sensor Bank 1 harness is open or shorted
- Exhaust Valve Timing Control Position Sensor Bank 1 circuit poor electrical connection
- Accumulation of debris to the signal pick-up portion of the camshaft
- Crankshaft position sensor
How to Fix the DTC P1078 Infiniti?
Review the 'Possible Causes' above and visually examine the corresponding wiring harness and connectors. Check for damaged components and inspect connector pins for signs of being broken, bent, pushed out, or corroded.
What is the Cost to Diagnose the Code?
Labor: 1.0
To diagnose the P1078 Infiniti code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.
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Information for Specific Infiniti Models
- P1078 2005 Infiniti G35 — Exhaust Valve Timing Control Position Sensor Bank 1 Circuit
- P1078 2006 Infiniti G35 — Exhaust Valve Timing Control Position Sensor Bank 1 Circuit
Frequently Asked Questions about P1078 Infiniti Code
No Frequently Asked Questions about P1078 Infiniti Code found.
Discuss the causes and fixes for P1078 Infiniti OBDII Code
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we checked the position sensor wire we get power and signal, and switched the position sensor and the solenoid from bank 2 but still the engine light on did u recommend me some thing
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If you’ve swapped the sensor and solenoid from Bank 2 to Bank 1 and the P1078 still comes back on Bank 1, that usually means the problem isn’t the sensor or the solenoid anymore. At that point you want to look at two things:
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The wiring on Bank 1 under load – even if you see power and signal with a meter, the signal wire may be breaking internally or losing continuity when the engine is vibrating. Try doing a wiggle test on the harness while watching the live data.
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Mechanical timing on that bank – if the timing chain guide or the cam phaser is starting to stick on Bank 1, the sensor will report the wrong cam position and the ECM thinks the sensor circuit is bad. This is pretty common on higher-mileage VQ engines.
If the wiring checks out, you may need to verify cam timing or check the cam phaser operation with a scan tool. A mechanical issue on that cam is the most common cause when parts have already been swapped.
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