P1062 Code: Variable Valve Timing Control Circuit Low (Bank 2) – Complete Guide
Is your Mers vehicle’s check engine light illuminated with a diagnostic trouble code (DTC) P1062 stored in its computer memory? This specific code indicates an electrical malfunction within the sophisticated Variable Valve Timing (VVT) system on your engine’s Bank 2. At 24car-repair.com, our expert technicians have compiled this comprehensive guide to help you understand, diagnose, and resolve the P1062 code effectively.
Code Definition
P1062 – Variable Valve Timing Control Circuit Low (Bank 2)
This OBD-II code signifies that the Engine Control Module (ECM) has detected an abnormally low voltage condition or a short circuit to ground in the control circuit for the Variable Valve Timing solenoid on Bank 2 of the engine. The ECM continuously monitors the voltage in this circuit and will set code P1062 when it detects voltage levels consistently below the expected threshold for proper solenoid operation.
1. Understanding the P1062 Code
The P1062 diagnostic trouble code is manufacturer-specific, though it’s commonly found in various Mers vehicle models equipped with Variable Valve Timing technology. To fully comprehend this issue, let’s break down its components:
1.1. Variable Valve Timing (VVT) System
Modern engines employ sophisticated Variable Valve Timing technology to optimize performance, fuel efficiency, and emissions across different engine operating conditions. The system electronically adjusts the timing of valve opening and closing events by controlling oil pressure to a phaser mechanism connected to the camshaft. This allows the engine computer to advance or retard camshaft timing based on driving demands, improving low-end torque, high-RPM power, and overall engine efficiency. The VVT system consists of several key components including the VVT solenoid (oil control valve), camshaft position sensors, the VVT phaser, and the Engine Control Module that coordinates all these elements.
1.2. Control Circuit Low
The “Control Circuit Low” portion of the code indicates that the Engine Control Module (ECM) has detected voltage in the VVT control circuit that is consistently lower than expected or has found a short to ground. The ECM monitors the control circuit for proper voltage levels when commanding the VVT solenoid to activate. When the ECM sends a signal to the VVT solenoid but detects insufficient voltage in the return circuit, it interprets this as a malfunction and stores the P1062 code. This condition can result from excessive resistance in the circuit, a short to ground, or a failing solenoid that’s drawing too much current.
1.3. Bank 2 Designation
In engines with a “V” configuration (V6, V8, V10, etc.), the engine is divided into two banks:
- Bank 1: Contains cylinder #1 – this is the reference point for all bank-specific diagnostics
- Bank 2: The bank opposite Bank 1 (does not contain cylinder #1)
For transverse-mounted engines (typical in front-wheel-drive vehicles), Bank 2 is usually the rear bank. For longitudinal engines (typical in rear-wheel-drive vehicles), Bank 2 is typically the passenger-side bank. Accurate identification of Bank 2 is crucial for proper diagnosis and repair of the P1062 code.
2. Symptoms of P1062 Code
When the P1062 code is stored, you may experience one or more of the following symptoms, ranging from mild to severe depending on how long the issue has been present:
- Illuminated Check Engine Light (MIL) Always Present
- Reduced engine power and noticeable hesitation during acceleration, especially under load
- Significant decrease in fuel economy (typically 10-20% reduction in efficiency)
- Rough idling or engine stalling, particularly at low RPM or when coming to a stop
- Engine may fail to enter “power mode” or feel consistently sluggish, especially at higher RPMs
- Potential rattling noise from the timing chain cover if the issue relates to oil pressure problems affecting the VVT phaser
- In some cases, the vehicle may enter “limp mode” to protect the engine from potential damage, severely limiting performance
- Failed emissions tests due to improper combustion timing and increased hydrocarbon emissions
Important Note
While it may be possible to drive with a P1062 code for short distances, prolonged operation can lead to reduced engine efficiency, increased emissions, potential damage to catalytic converters, and in severe cases, engine timing issues that could cause internal component damage. We recommend addressing this issue promptly to avoid more costly repairs down the line.
3. Common Causes of P1062 Code
The root cause of a P1062 code is always an electrical fault in the Bank 2 VVT control circuit. Here are the most common culprits, ordered by probability of occurrence based on repair statistics from our network of certified mechanics:
3.1. Faulty VVT Solenoid (Oil Control Valve) – Bank 2
The VVT solenoid is the most frequent point of failure, accounting for approximately 65% of P1062 cases. These solenoids can fail due to:
- Internal electrical short circuits or open circuits within the solenoid windings
- Mechanical jamming from engine sludge, debris, or metal particles circulating in the oil
- Contamination from metal particles in the oil, often from normal engine wear
- Normal wear and tear over 80,000-120,000 miles of operation
- Heat degradation from prolonged exposure to high engine temperatures
- Faulty internal valves that stick in either open or closed positions
3.2. Wiring and Connector Issues
Problems in the wiring harness connecting to the Bank 2 VVT solenoid account for approximately 25% of P1062 cases. These issues include:
- Open circuits (broken wires) causing complete loss of continuity in the control circuit
- Short to ground in the control wire, often due to insulation damage from heat or abrasion
- Chafed or corroded wires, especially near sharp edges, heat sources, or moving components
- Loose, corroded, or damaged connector pins at the VVT solenoid connector
- Water intrusion into connectors causing corrosion and increased resistance
- Previous repair damage to the wiring harness from unrelated service work
3.3. Low Engine Oil Level or Pressure
The VVT system relies on proper engine oil pressure to function correctly. Issues with oil delivery account for approximately 7% of P1062 cases:
- Low oil level reduces available oil pressure to actuate the VVT system
- Using incorrect oil viscosity can affect VVT operation and response times
- Clogged oil passages prevent proper oil flow to the VVT solenoid and phaser mechanism
- Worn oil pump or engine bearings causing consistently low oil pressure
- Dirty or contaminated oil that doesn’t flow properly through small solenoid passages
- Extended oil change intervals leading to sludge buildup that restricts oil flow
3.4. Faulty Engine Control Module (ECM)
While rare (accounting for less than 3% of cases), a malfunctioning ECM that cannot properly control the VVT circuit can trigger this code. This should only be considered after all other possibilities have been thoroughly eliminated through systematic diagnosis. ECM issues may include:
- Internal circuit board damage affecting driver circuits for the VVT system
- Corrosion or damage to ECM connectors
- Software glitches or calibration issues
- Previous water damage or electrical surges affecting ECM operation
4. Diagnostic and Repair Procedures
Safety First
Always disconnect the battery before working on electrical components. Ensure the engine is completely cool before beginning diagnosis. Proper diagnosis requires a digital multimeter, a quality scan tool, and a solid understanding of automotive electrical systems. If you’re not comfortable with these procedures, consult a qualified technician.
4.1. Preliminary Checks
Before diving into complex electrical diagnosis, perform these basic checks which can often reveal simple solutions:
- Verify engine oil level and condition: Check that oil is at the proper level on the dipstick and not excessively dirty, sludgy, or contaminated. Oil that’s well past its change interval can cause VVT issues.
- Check for related codes: Use your scan tool to check for additional codes that might point to a broader electrical issue or problems with other systems that could be related.
- Visual inspection: Locate the Bank 2 VVT solenoid (consult your vehicle’s service manual for exact location) and inspect the wiring harness and connector for obvious damage, corrosion, chafing, or loose pins. Look for oil leaks in the vicinity that could affect electrical connections.
- Check oil pressure: If possible, verify that engine oil pressure is within specifications using a mechanical gauge, as the dashboard indicator may not provide accurate information.
4.2. Step-by-Step Electrical Diagnosis
Test the VVT Solenoid Resistance
- Disconnect the electrical connector from the Bank 2 VVT solenoid
- Set your multimeter to measure resistance (ohms) at an appropriate range
- Measure resistance across the solenoid’s two terminals
- Compare to manufacturer specifications (typically 6.5-7.5 ohms at room temperature for most Mers models, but always verify)
- A reading outside the specified range confirms a faulty solenoid that needs replacement
- A reading of 0 ohms indicates a short circuit within the solenoid; infinite resistance indicates an open circuit
Circuit Voltage Test
- With the connector still disconnected, turn the ignition to the “ON” position (engine off)
- Back-probe the harness connector with your multimeter set to DC volts
- Check for reference voltage (usually 12V or 5V depending on system design) from the ECM on the appropriate pin
- No voltage indicates a wiring problem between the ECM and solenoid or an ECM issue
- Low voltage suggests excessive resistance in the wiring or a poor connection
Check for Short to Ground
- With the connector still disconnected and ignition OFF
- Set multimeter to resistance or continuity mode
- Check for continuity between the control circuit wire and ground (vehicle chassis)
- Continuity indicates a short to ground in the wiring that needs to be repaired
- Also check for continuity between the two circuit wires which would indicate a short circuit
ECM Command Test
- With a advanced scan tool that can activate components, command the Bank 2 VVT solenoid on and off
- Listen for an audible click from the solenoid indicating mechanical operation
- No click suggests a faulty solenoid (if power and ground are confirmed at the connector)
- Monitor the solenoid operation with a multimeter to verify proper voltage application
4.3. Repair Procedures
VVT Solenoid Replacement
If testing confirms a faulty VVT solenoid, replacement is typically straightforward:
- Locate the Bank 2 VVT solenoid (consult vehicle-specific repair manual for exact location and access procedures)
- Disconnect the electrical connector by pressing the release tab and pulling straight out
- Remove the mounting bolt(s) (typically one or two bolts, often 10mm or 8mm)
- Carefully remove the old solenoid, being prepared for some oil leakage – have a drain pan ready
- Clean the mounting surface thoroughly to ensure a good seal with the new solenoid
- Install the new solenoid with a new O-ring/gasket if provided (never reuse the old seal)
- Lightly lubricate the O-ring with clean engine oil before installation
- Reconnect the electrical connector until it clicks into place
- Clear codes with your scan tool and perform a test drive to verify the repair and ensure the code doesn’t return
Wiring Repair
For damaged wiring, proper repair is essential for long-term reliability:
- Identify the exact location and extent of the damaged section of wire
- Cut out the damaged portion using proper wire cutters
- Strip approximately 1/2 inch of insulation from both ends of the existing wire and the replacement wire
- Splice in a new section of wire of the same gauge and temperature rating using proper crimp connectors or soldering
- Solder connections for maximum reliability, using rosin-core solder and proper technique
- Protect with heat shrink tubing of appropriate size, applying heat evenly until it seals completely
- Secure the repaired harness away from sharp edges, heat sources, or moving components using appropriate clamps or loom
- Test the repair for proper operation before reassembling all components
5. P1062 Repair Cost Estimate
Repair costs for a P1062 code vary significantly based on the specific Mers model, labor rates in your geographical area, and the root cause of the problem. The estimates below are based on current market data and assume the issue is primarily with the VVT solenoid itself unless otherwise noted.
| Repair Scenario | Parts Cost | Labor Cost | Total Estimated Cost | Time Estimate | Success Probability |
|---|---|---|---|---|---|
| DIY VVT Solenoid Replacement (You supply parts and labor) |
$75 – $250 | $0 | $75 – $250 | 1-2 hours | 85% |
| Independent Repair Shop (Replacing VVT Solenoid only) |
$100 – $300 | $150 – $300 (1-2 hours labor) |
$250 – $600 | 1-2 hours | 90% |
| Mers Dealership (Replacing VVT Solenoid only) |
$200 – $400 | $250 – $450 (1-2 hours at premium rates) |
$450 – $850 | 1-2 hours | 95% |
| Complex Wiring Repair (Diagnosis and harness repair) |
$50 – $150 (wiring/connectors) |
$200 – $500 (2-4 hours labor) |
$250 – $650 | 2-4 hours | 80% |
| Major Repair (ECM replacement or extensive wiring issues) |
$500 – $1,500+ (ECM + programming) |
$500 – $1,000+ (4-8 hours labor) |
$1,000 – $2,500+ | 4-8 hours | 70% |
| Complete VVT System Repair (Solenoid, phaser, and timing component replacement) |
$800 – $2,000+ (multiple components) |
$800 – $1,500+ (6-10 hours labor) |
$1,600 – $3,500+ | 6-10 hours | 98% |
Note: These are estimates based on current market rates and repair data. Always obtain a detailed quote from your trusted mechanic before authorizing repairs. Success probability indicates the likelihood that the specific repair will resolve the P1062 code based on historical repair data.
Cost-Saving Tip
Consider having a complete diagnosis performed at a trusted independent shop (typically $100-$200) before proceeding with repairs. An accurate diagnosis can save money by ensuring you’re fixing the actual problem rather than guessing. Many shops will apply the diagnosis fee toward the repair if you have them perform the work.
6. Frequently Asked Questions (FAQ)
While possible for short distances, we don’t recommend extended driving with a P1062 code. You’ll experience reduced performance and fuel economy, and prolonged operation could potentially damage the catalytic converter due to improper combustion timing. If the vehicle enters limp mode, your driving capability will be significantly limited. For safety and to prevent further damage, we recommend addressing the issue within 100-200 miles of the code first appearing.
P1062 specifically indicates a “low” circuit condition (short to ground or low voltage) on Bank 2. Related codes include:
- P1061: VVT Control Circuit High (Bank 2) – indicates high voltage or short to power
- P1060: VVT Control Circuit Malfunction (Bank 2) – generic circuit fault without specific voltage indication
- P1052/P1051: Same issues but for Bank 1 instead of Bank 2
- P0010-P0014: Generic camshaft position actuator codes that may relate to VVT system issues
- P0340-P0344: Camshaft position sensor codes that can sometimes be related to VVT system problems
Regular maintenance is key to preventing VVT system problems:
- Follow manufacturer-recommended oil change intervals using the specified oil viscosity and quality
- Use high-quality synthetic oil that resists sludge formation and breakdown under high temperatures
- Replace the oil filter at every oil change with a quality filter that meets OEM specifications
- Address any oil leaks promptly to maintain proper oil level and pressure
- Have timing components inspected according to the manufacturer’s maintenance schedule
- Avoid extended idling which can accelerate oil degradation
- Use fuel system cleaners periodically to maintain overall engine health
- Address any check engine lights promptly before they lead to additional issues
Yes, in most regions, an active P1062 code will cause your vehicle to automatically fail emissions testing. The VVT system plays a crucial role in controlling emissions by optimizing valve timing for complete combustion, and any malfunction in this system typically results in increased hydrocarbon (HC) and nitrogen oxide (NOx) emissions. Some areas may allow a waiver if you can demonstrate that repairs have been attempted, but most will require the issue to be fully resolved before passing inspection.
No, a dirty throttle body won’t directly cause a P1062 code. However, multiple issues can sometimes present with similar symptoms. The P1062 code is specifically electrical in nature, relating to the VVT control circuit on Bank 2. That said, a severely dirty throttle body could cause rough running that might be mistaken for VVT issues, but it would typically set different codes related to airflow or throttle position rather than a specific VVT circuit code.
A competent technician can typically diagnose a P1062 code in 30-60 minutes if they follow a systematic approach. The process usually involves verifying the code, checking for related codes, performing a visual inspection of wiring and connections, testing the VVT solenoid resistance, and checking circuit voltage and integrity. More complex cases involving intermittent issues or difficult-to-access components may require additional time. Most repair shops charge 0.5-1.0 hours for diagnosis, which may be applied toward the repair cost if you have them fix the issue.
7. Conclusion
The P1062 code represents an electrical fault in the Variable Valve Timing control circuit specifically on Bank 2 of your Mers engine. While it can cause noticeable drivability issues including reduced power, poor fuel economy, and rough running, it is often resolved by replacing a single component—the VVT solenoid—which is generally accessible and affordable compared to many engine repairs.
Starting with simple checks like verifying oil level and condition can often point you in the right direction before moving on to more complex electrical diagnostics. For accurate, vehicle-specific troubleshooting diagrams and procedures, trust the automotive experts at 24car-repair.com. If you’re not comfortable performing the diagnosis yourself, we recommend consulting a qualified technician to correctly resolve the P1062 code and restore your Mers’s performance, efficiency, and reliability.
Final Recommendation
Based on repair statistics, the VVT solenoid replacement resolves approximately 65% of P1062 cases. We recommend starting diagnosis with resistance testing of the solenoid, followed by circuit integrity checks. If you’re considering DIY repair, the VVT solenoid replacement is generally manageable for those with intermediate mechanical skills and proper tools. For complex wiring issues or if multiple codes are present, professional diagnosis is strongly recommended to avoid unnecessary parts replacement and ensure a complete repair.
