P0335 – Crankshaft Position Sensor A Circuit Malfunction
Let’s break down exactly what the P0335 trouble code means for your Haval and how to fix it.
WHAT DOES CODE P0335 MEAN
The P0335 trouble code indicates a malfunction in the crankshaft position sensor A circuit. This sensor plays a crucial role in monitoring the engine’s crankshaft position and rotation speed, which is essential for the engine control module to calculate fuel injection, ignition timing, and other critical engine functions. When the crankshaft position sensor fails or its circuit malfunctions, the engine control module is unable to accurately determine the engine’s operating conditions, leading to a range of problems.
COMMON Haval MODELS AFFECTED
- Haval H6
- Haval H9
- Haval F7
- Haval Jolion
- Haval Big Dog
SYMPTOMS
- Engine stalling or hesitation
- Difficulty starting the engine
- Reduced engine power and performance
- Irregular engine idle
- Check Engine Light illumination
- Abnormal engine noises or vibrations
- Poor fuel efficiency
CAUSES TABLE
| Potential Cause | Probability (High/Medium/Low) |
|---|---|
| Faulty crankshaft position sensor | High |
| Corrosion or damage to sensor wiring | Medium |
| Malfunctioning engine control module | Low |
| Failed or worn-out crankshaft position sensor mounting | Medium |
| Incorrect crankshaft position sensor installation | Low |
| Other related component failures (e.g., camshaft position sensor) | Low |
DIAGNOSTIC STEPS
To diagnose the P0335 trouble code, start by checking the crankshaft position sensor and its wiring for any signs of damage or corrosion. Use a multimeter to measure the sensor’s voltage and resistance readings, which should change smoothly depending on engine RPM. Also, check the engine control module for any software updates or issues. If necessary, perform a scan tool test to monitor the sensor’s signal and compare it to the manufacturer’s specifications.
HOW TO FIX
The primary repair method for the P0335 trouble code is to replace the faulty crankshaft position sensor. This may involve purchasing a new sensor and installing it according to the manufacturer’s instructions. Additionally, inspect and repair or replace any damaged wiring or related components. In some cases, reprogramming the engine control module may be necessary to ensure proper communication with the new sensor.
IS IT SAFE TO DRIVE WITH THIS CODE
Driving with the P0335 trouble code active can pose technical risks, as the engine may stall or hesitate, leading to a loss of control or an accident. Additionally, continued operation with a faulty crankshaft position sensor can cause further damage to the engine and other components, resulting in costly repairs. It is recommended to address the issue as soon as possible to ensure safe and reliable vehicle operation.
ESTIMATED REPAIR COST
The estimated repair cost for the P0335 trouble code can range from $200 to $1,000, depending on the specific cause of the issue, the cost of replacement parts, and labor rates. In some cases, additional repairs or component replacements may be necessary, which can increase the overall cost.
PREVENTIVE MAINTENANCE TIPS
To prevent the P0335 trouble code from occurring, it is essential to perform regular maintenance on your Haval vehicle, including checking and maintaining the engine’s wiring and sensors. Regularly inspecting the crankshaft position sensor and its mounting for signs of wear or damage can help identify potential issues before they become major problems. Additionally, keeping the engine control module software up-to-date can help prevent issues related to outdated programming.
RELATED TROUBLE CODES
- Error P0336 on Haval — crankshaft position sensor A circuit range/performance problem
- Error P0337 on Haval — crankshaft position sensor A circuit low input
- Error P0338 on Haval — crankshaft position sensor A circuit high input
- Error P0339 on Haval — crankshaft position sensor A circuit intermittent