Meta Description: Looking for a reliable KV61-5E145-AE NOx sensor for your Ford Transit Connect 1.5 EcoBlue? WJIECO offers IATF 16949 certified downstream nitrogen oxide sensors with OEM-grade quality, direct fit, and competitive pricing for Euro 6 diesel vehicles.
Introduction
If you own a Ford Transit Connect or Tourneo Connect with the 1.5 TDCi / EcoBlue diesel engine, you’ve probably encountered issues with the NOx sensor. The KV61-5E145-AE downstream nitrogen oxide sensor is a critical component of your vehicle’s Selective Catalytic Reduction (SCR) system, designed to meet strict Euro 6 emissions standards.
A faulty NOx sensor can trigger the check engine light, cause limp mode activation, and even lead to MOT failure. In this comprehensive guide, we’ll cover everything you need to know about the KV61-5E145-AE NOx sensor — from compatibility and specifications to common fault codes and replacement tips.
At WJIECO, we specialize in manufacturing OEM-grade emissions sensors for European and American diesel vehicles. All our NOx sensors are IATF 16949 certified and built to original equipment specifications, ensuring reliable performance and long service life.
What Is the KV61-5E145-AE NOx Sensor?
The KV61-5E145-AE is a downstream (post-SCR) nitrogen oxide sensor used in Ford’s 1.5-liter EcoBlue diesel engines. It’s mounted after the SCR catalytic converter in the exhaust system and measures the residual NOx concentration in the exhaust gases.
Key Functions:
- Monitors SCR efficiency: The ECU compares upstream and downstream NOx readings to calculate urea (AdBlue) conversion efficiency
- Regulates AdBlue injection: Helps optimize diesel exhaust fluid dosing for maximum emissions reduction
- Ensures Euro 6 compliance: Essential for meeting strict European emissions regulations
- Protects engine components: Prevents damage from incorrect SCR operation
Cross-Reference Part Numbers:
- Original Ford OE: KV61-5E145-AE
- Superseded version: KV61-5E145-AC (fully interchangeable)
- Ford reference: 2552693
- Bosch chip reference: 0281007424
Note: KV61-5E145-AC and KV61-5E145-AE are hardware-identical and fully interchangeable. The suffix difference only indicates production batch revisions — no wiring or mounting modifications are needed.
Compatible Vehicles
The KV61-5E145-AE NOx sensor is designed for the following Ford vehicles equipped with the 1.5 TDCi / 1.5 EcoBlue diesel engine (Euro 6 / Euro 6b):
表格
| Vehicle Model | Generation | Engine | Years |
|---|---|---|---|
| Ford Transit Connect | V408 | 1.5 TDCi / 1.5 EcoBlue | 2018–2023 |
| Ford Tourneo Connect | V408 | 1.5 TDCi / 1.5 EcoBlue | 2018–2023 |
Engine Variants:
- 1.5 EcoBlue 75 PS (55 kW)
- 1.5 EcoBlue 100 PS (74 kW)
- 1.5 EcoBlue 120 PS (88 kW)
Important: This is the downstream (post-SCR) NOx sensor. If you need the upstream (pre-SCR) sensor, please check our store for the correct part number.
Technical Specifications
表格
| Parameter | Specification |
|---|---|
| Part Number | KV61-5E145-AE |
| Sensor Type | Downstream NOx (Nitrogen Oxide) Sensor |
| Operating Voltage | 12V |
| Connector Type | 5-pin plug |
| Mounting Position | After SCR catalytic converter |
| Emissions Standard | Euro 6b / China VI |
| System Compatibility | DOC + DPF + SCR aftertreatment system |
| Chip Technology | Bosch 0281007424 |
| Response Time | < 100 ms |
| Operating Temperature Range | -40°C to +850°C (exhaust gas) |
Why Choose WJIECO KV61-5E145-AE NOx Sensor?
🏭 OEM-Grade Manufacturing
As an IATF 16949 certified manufacturer with direct supply experience to major automakers including GM, Renault, and SAIC, WJIECO brings OEM-level quality to the aftermarket. Every KV61-5E145-AE sensor undergoes rigorous testing before leaving the factory.
⚡ Direct Fit, No Modifications
Our NOx sensors are designed as direct replacements for the original KV61-5E145-AE unit. Same connector, same mounting thread, same cable length — plug-and-play installation with no modifications required.
💰 Competitive Pricing
Why pay dealer prices when you can get OEM-quality at a fraction of the cost? WJIECO cuts out the middleman and delivers factory-direct pricing to professional mechanics and DIY enthusiasts alike.
🔧 Built for Durability
- High-temperature resistant probe coating
- Corrosion-resistant stainless steel housing
- Waterproof connector with sealed wiring
- Reinforced cable strain relief
✅ Quality Assurance
- 100% bench-tested before shipment
- Strict quality control per IATF 16949 standards
- Compatible with all major diagnostic tools
Common Fault Codes & Symptoms
A failing KV61-5E145-AE NOx sensor often triggers one or more of these diagnostic trouble codes (DTCs):
Typical Fault Codes:
表格
| Fault Code | Description |
|---|---|
| P2201 | NOx Sensor Circuit Range/Performance (Bank 1 Sensor 2) |
| P2202 | NOx Sensor Circuit Low (Bank 1 Sensor 2) |
| P220E | NOx Sensor Performance – Bank 1 Sensor 2 |
| P220F | NOx Sensor Heater Control Circuit/Performance |
| P229E | NOx Sensor 2 Calibration Error |
| P2463 | Diesel Particulate Filter Soot Accumulation |
Common Symptoms of a Bad NOx Sensor:
- Check engine light illuminated on dashboard
- Engine enters limp mode (reduced power and speed)
- Poor fuel economy due to incorrect AdBlue dosing
- Excessive AdBlue consumption or AdBlue system warnings
- Failed MOT / emissions test
- Rough idle or hesitation during acceleration
- SCR efficiency warning messages on the instrument cluster
Installation & Troubleshooting Tips
Before You Replace:
- Verify the fault code: Use an OBD-II scanner to confirm which sensor is faulty (upstream vs. downstream)
- Check the wiring harness: Inspect for damage, corrosion, or loose connections before replacing the sensor
- Inspect the connector: Water damage or bent pins can mimic sensor failure
Installation Steps:
- Ensure the exhaust system is cool to avoid burns
- Disconnect the negative battery terminal
- Locate the downstream NOx sensor after the SCR catalyst
- Disconnect the electrical connector
- Use a 22mm NOx sensor socket to remove the old sensor
- Apply anti-seize compound to the new sensor threads (avoid getting it on the probe)
- Install the new KV61-5E145-AE sensor and torque to specifications (typically 40-50 Nm)
- Reconnect the electrical connector and battery
- Clear fault codes using a diagnostic tool
- Perform a NOx sensor reset and SCR adaptation using professional diagnostic software
- Road test the vehicle to confirm proper operation
Critical: After replacing the NOx sensor, you must perform a sensor reset and SCR adaptation with a Ford-compatible diagnostic tool (such as Ford IDS, Forscan, or Autel). Failure to do so may result in continued fault codes and limp mode.
Common Causes of Premature Failure:
- Exhaust soot buildup on the sensor probe
- AdBlue/urea crystal corrosion
- Water ingress into the connector
- Broken heating element inside the sensor
- Vibration damage from loose mounting
Frequently Asked Questions
Q: How long does a NOx sensor last?
A: Under normal operating conditions, a quality NOx sensor like the WJIECO KV61-5E145-AE can last 80,000–120,000 km. However, factors like poor fuel quality, excessive idling, and contaminated AdBlue can shorten service life.
Q: Can I clean a NOx sensor instead of replacing it?
A: While some DIY methods exist, cleaning is rarely a long-term solution. The sensing element is extremely delicate and can be permanently damaged by cleaning chemicals. For reliable performance, replacement with a quality sensor like the WJIECO KV61-5E145-AE is recommended.
Q: Is KV61-5E145-AC the same as KV61-5E145-AE?
A: Yes. Both part numbers are fully interchangeable. The “AC” and “AE” suffixes indicate different production revisions, but the sensor is mechanically and electrically identical.
Q: Do I need to reset the ECU after replacement?
A: Absolutely. You must clear existing fault codes and perform a NOx sensor reset / SCR adaptation procedure. This ensures the ECU recognizes the new sensor and recalibrates the AdBlue injection system.
Q: Does WJIECO offer a warranty?
A: Yes. All WJIECO NOx sensors come with a standard 12-month warranty against manufacturing defects. Our IATF 16949 certification ensures consistent quality you can trust.
Conclusion
The KV61-5E145-AE NOx sensor is a vital emissions component for Ford Transit Connect and Tourneo Connect 1.5 EcoBlue diesel vehicles. When it fails, you need a reliable replacement that won’t let you down.
WJIECO delivers OEM-quality NOx sensors with:
- ✅ IATF 16949 certified manufacturing
- ✅ Direct fit replacement for KV61-5E145-AE / KV61-5E145-AC
- ✅ Proven performance in Euro 6 diesel applications
- ✅ Competitive factory-direct pricing
- ✅ 12-month warranty
Don’t let a faulty NOx sensor leave you stranded or facing expensive dealer repair bills. Trust WJIECO for professional-grade emissions components backed by decades of automotive manufacturing expertise.
Ready to replace your NOx sensor? Browse our full range of Ford diesel emissions sensors or contact our technical support team for compatibility assistance.
Tags: KV61-5E145-AE, KV61-5E145-AC, Ford NOx sensor, Transit Connect NOx sensor, 1.5 EcoBlue NOx sensor, downstream NOx sensor, Euro 6 diesel, SCR system, WJIECO, IATF 16949, diesel emissions, NOx sensor replacement
