P0025 on 2019-2021 Ford Ranger: Exhaust Cam Timing Over-Retarded Causes & Fixes

What's Unique About the 2019-2021 Ford Ranger

The most confusing aspect for this platform is seeing a 'Bank 2' code on an engine with only one bank. It's a quirk of the code definition, not an indication of a V6/V8 engine. Ford has issued Technical Service Bulletins (TSBs) for a wide range of vehicles with this engine family, including the Ranger, pointing specifically to small debris contaminating the oil and causing the VCT solenoids to stick. This suggests a known sensitivity in the VCT system to oil condition and cleanliness. The 2.3L EcoBoost is used across many Ford and Lincoln models, making this a well-documented issue.

Diagnostic Flowchart

Tap your situation to follow the diagnostic path that matches what you're seeing on this vehicle.

Symptoms You May Notice

• Check Engine Light is on
• Rough or unstable idle
• Reduced engine power and acceleration
• Engine may hesitate or stall, especially when coming to a stop
• Decreased fuel economy
• Engine may be hard to start
• Engine may make knocking or ticking noises

Most Likely Causes

1. Dirty or Sticking Exhaust VCT Solenoid 🔴 High Probability A manufacturer TSB (SSM 50067) directly states this code may be due to small debris causing the VCT solenoid to stick. The solenoids have fine mesh screens that can become clogged by oil sludge or debris, impeding their function.
   How to confirm: Inspect the solenoid for debris. Use a capable scan tool to command the solenoid and watch for a response. 🎬 Watch: How to tell if your VVT solenoid is bad Per TSB SSM 50067, a technician can cycle the solenoid 10 times with a scan tool to try and clear it (Pinpoint Test HK12). You can also swap the exhaust and intake solenoids (if they are the same part number) and see if the code changes to P0015.
   Typical fix: Clean or replace the exhaust VCT solenoid. It is often recommended to replace both intake and exhaust solenoids at the same time.
   Est. part cost: $30-$150
2. Low or Dirty Engine Oil 🔴 High Probability The VCT system is hydraulic and relies entirely on clean oil at the correct pressure to function. Contaminated or low oil is a primary cause of VCT faults. The issue can sometimes appear after an oil change if the wrong viscosity oil was used or if the change dislodged sludge.
   How to confirm: Check the oil level on the dipstick and inspect its color and consistency. If it's low, black, or sludgy, this is a likely contributor.
   Typical fix: Perform an oil and filter change using the manufacturer-specified grade of full synthetic oil (e.g., Motorcraft 5W-30).
   Est. part cost: $40-$80
3. Failing Camshaft Phaser ⚪ Low Probability
   How to confirm: This is typically diagnosed after ruling out oil issues and VCT solenoid failure. Advanced diagnostics, such as using an oscilloscope to compare cam and crank signals, may be required. This is a more complex mechanical failure inside the timing assembly.
   Typical fix: Replace the exhaust camshaft phaser. This is a more involved and expensive repair.
   Est. part cost: $150-$300

Rare But Worth Checking

• Wiring or Connector Issue: The wiring harness or connector to the VCT solenoid could be damaged, loose, or corroded, preventing the solenoid from receiving the correct signal from the PCM.
• Stretched Timing Chain: While less common on a newer vehicle, a stretched timing chain or failing tensioner can cause the cam/crank correlation to be off, triggering this code.
• PCM Fault: This is extremely rare, but the Powertrain Control Module could be failing. This should only be considered after all other possibilities have been exhausted.

Diagnosis Steps

1. Read the code with an OBD-II scanner to confirm P0025 is present.
2. Check the engine oil level and condition. If it is low or dirty, perform an oil and filter change with the correct full synthetic oil, clear the code, and re-test.
3. Inspect the wiring and connector for the exhaust VCT solenoid (the 'B' solenoid) for any signs of damage, corrosion, or loose connections.
4. Remove the exhaust VCT solenoid and inspect it for sludge or debris on the screens. Per TSB SSM 50067, this is a common issue.
5. If you have a bi-directional scan tool, command the solenoid on and off to check for mechanical response. Ford's diagnostic procedure (Pinpoint Test HK12) involves cycling the solenoid 10 times to attempt to clear debris.
6. A common DIY test is to swap the exhaust VCT solenoid with the intake VCT solenoid (they are the same part, CJ5Z-6M280-A). Clear the codes and drive the vehicle. If the code returns as P0015 ('B' Camshaft Position - Timing Over-Retarded, Bank 1), the solenoid is confirmed to be faulty.
7. If the solenoid and oil are good, test the solenoid's resistance with a multimeter. It should be between 6.9 and 7.9 Ohms.
8. If all above steps fail to resolve the issue, the problem may be with the camshaft phaser itself, which requires more in-depth mechanical work.

Parts You'll Likely Need

• Engine Variable Valve Timing (VCT) Solenoid (OEM #CJ5Z-6M280-A) — This is the most common failure point for P0025, as identified by Ford TSBs and general diagnostic consensus. It controls oil flow to the cam phaser. 🎬 See this walkthrough on how to replace the VVT solenoid Both intake and exhaust solenoids are the same part.
  Trusted brands: Motorcraft, Standard Motor Products (SMP), Gates
  OEM price range: $30-$50
  Aftermarket price range: $25-$45
• Engine Oil and Filter — Low or dirty oil is a primary cause of VCT system faults. A fresh oil change is a critical first step in diagnosis and repair.
  Trusted brands: Motorcraft, Mobil 1, Castrol
  OEM price range: $60-$90
  Aftermarket price range: $40-$70

Related Codes That Often Appear With This One

• P0024 — This is the opposite code for the same camshaft, indicating an 'Over-Advanced' condition. Seeing them together or intermittently could point to a very erratic VCT solenoid or phaser.
• P0011, P0012, P0014, P0015 — These are the corresponding codes for the intake camshaft. If oil quality or pressure is poor, it can affect both intake and exhaust VCT systems, potentially triggering codes for both.
• P0019 — Crankshaft - Camshaft Position Correlation Bank 2 Sensor B. This code can appear alongside P0025, indicating a more significant timing discrepancy that the PCM has detected between the crank and exhaust cam. A user on Bronco6G forums reported this combination of codes was resolved by cleaning the cam oil control solenoids.

Technical Service Bulletins (TSBs) & Recalls

• SSM 54366: Notes updated diagnostic procedures in the workshop manual for a range of VCT codes, including P0025.
• SSM 50067: Suggests P0025 may be caused by small debris causing the VCT solenoid to stick and advises checking this before component replacement. It specifically recommends using scan tool pinpoint test HK12 to cycle the solenoid 10 times to clear debris.

Platform-Specific Known Issues

• TSB SSM 50067 specifically mentions that on some Ford vehicles, DTCs including P0025 may be present due to small debris causing the VCT solenoid to stick. It advises against immediate component replacement before checking for this and attempting to clear the debris by cycling the solenoid with a scan tool.
• TSB SSM 54366 indicates that diagnostic procedures for a group of VCT codes, including P0025, have been updated in the official workshop manual, suggesting it's a well-documented issue area.
• A Ford Bronco owner on the Bronco6G forum with the same 2.3L engine reported a cluster of codes including P0025, P0019, and various misfire codes after off-roading. The solution involved cleaning water/mud from the engine bay, replacing spark plugs, and ultimately cleaning the cam oil control solenoids with compressed air, which cleared the final timing codes.

Mechanic-Grade Diagnostic Values

• VCT Solenoid Internal Resistance — expected: Between 5 and 15 Ohms. A reading of 7.8 Ohms was recorded on a known good part. The value from Pass 2 (6.9-7.9 Ohms) is also within this range.. Failure: A reading of 0 Ohms (short circuit) or infinite/OL (open circuit).
• VCT Solenoid Connector Voltage (Key On, Engine Off) — expected: One pin should show battery voltage (approx. 12V).. Failure: No voltage indicates a problem with the power supply circuit, fuse, or PCM power relay.
• Scan Tool VCT Advance Error PID (VCT_ADV_ERR) — expected: Should be close to 0° at idle in closed loop, with an acceptable variance of +/- 5°.. Failure: A consistent, large non-zero value indicates the PCM is commanding a change that the phaser is not achieving.

Scan Tool Commands That Help

• Ford IDS (or equivalent professional scan tool): VCT Solenoid Duty Cycle / On-Off Command — This bidirectional control is used to manually activate the VCT solenoid. A technician can command it on and off to listen for an audible click from the solenoid, indicating it is not seized. It can also be used to see if manually activating the solenoid causes a change in idle quality, confirming it is capable of influencing oil flow. This is a primary step to take before replacing the solenoid, as noted in TSB SSM 50067.

Wiring & Ground Locations

• Main Cabin Ground Point — Behind the driver's side kick panel. This is a known grounding location for various OEM electronics, including the trailer brake controller.. The PCM and its related circuits require a solid ground to function. While a direct link to P0025 is not established, intermittent or poor grounds in this area can cause a wide range of difficult-to-diagnose electronic issues. Checking this ground is a wise step when chasing electrical gremlins.
• VCT Solenoid Connector — On the top of the valve cover, plugging into the VCT solenoid.. This is where voltage and the PCM's ground signal are delivered. A wiring diagram for a similar engine shows the power wire as Green-Orange (GN-OG). This is the primary point for testing voltage, resistance, and signal from the PCM.
• Engine Block to Firewall Ground — Typically a woven steel strap from the rear of the cylinder head or engine block to the vehicle's firewall.. This is a primary ground path for the entire engine assembly. A loose or corroded strap can cause sensor readings to be erratic and may lead to various engine performance codes.

OEM Part Supersession History

• CJ5Z-6M280-A → N/A — This appears to be the current and correct part number for the VCT solenoid.
  Heads up: No supersession or incompatibility notes found during research.