Error code
OBD2 P0025
OBD2P0025
Diagnostic Trouble Code· Standard OBD-II fault code read from the vehicle's onboard diagnostics.
What it means
'B' Camshaft Position - Timing Over-Retarded.
Severity
moderateCan drive but may experience reduced performance and fuel efficiency.
Summary
P0025 indicates that the camshaft position sensor on bank 2 (exhaust/right/rear) is detecting timing that is too retarded.
Symptoms
- Loss of gas mileage
- Engine stalling
- Check engine light
Common Causes
- Poor oil maintenance leading to carbon buildup and filter blockage in the VCT/VVT solenoid.
- Incorrect choice of low-quality oil for the specific engine model, causing excessive carbon build-up.
Diagnosis
- Use a multimeter to check the resistance of the camshaft position sensor terminals (should be around 7-12 ohms).
- Inspect and clean all harness connections from the valve solenoid to the PCM/ECM.
- Perform wiggle tests on wiring harnesses while monitoring multimeter readings for continuity issues.
Fixes
- Replace the VCT/VVT solenoid and clean the engine with an appropriate cleaning product.
FAQ
What is causing my P0025 code?
The most common cause is poor oil maintenance leading to carbon buildup in the VCT/VVT solenoid.
How can I prevent future issues with this code?
Use high-quality oils and maintain regular engine cleaning routines.
Not affiliated with OBD2. Answer summarized from the manufacturer's manual linked above; consult that source for the authoritative procedure.
More OBD2 codes
- P0001Fuel Volume Regulator Control Circuit/Open
- P0002Fuel Volume Regulator Control Circuit Range/Performance
- P0003Fuel Volume Regulator Control Circuit Low
- P0004Fuel Volume Regulator Control Circuit High
- P0005Fuel Shutoff Valve 'A' Control Circuit/Open
- P0006Fuel Shutoff Valve 'A' Control Circuit Low
- P0007Fuel Shutoff Valve 'A' Control Circuit High
- P0008Engine Position System Performance
- P0009Engine Position System Performance
- P0010'A' Camshaft Position Actuator Circuit
- P0011'A' Camshaft Position - Timing Over-Advanced or System Performance
- P0012'A' Camshaft Position - Timing Over-Retarded