Packard Clipper U1859 Engine Trouble Code
What is Packard Clipper U1859?
Packard Clipper U1859 indicates potential catalytic converter failure. If completely failed, your vehicle may not run properly and fuel economy will suffer significantly. Average replacement cost is $2,000–$2,140. This repair requires professional service and should not be delayed.
U1859 on the Packard Clipper
A known issue on the Packard Clipper is that aftermarket air filter upgrades can inadvertently trigger U1859. High-flow filters alter the intake resonance frequency, causing the MAP sensor to report pressure readings outside factory calibration.
Code Information
| Code Type: | OBD-II Network (U) Trouble Code |
| System: | Network |
| Vehicle: | Packard Clipper |
| Brand: | Packard |
| Model: | Clipper |
| Code: | U1859 |
U1859 Packard Clipper Symptoms
Check Engine Light
Illuminated Packard Clipper dashboard warning
Engine Stalling
Engine stops unexpectedly or misfires
Performance Issues
Reduced power or acceleration on the Packard Clipper
Starting Problems
Difficulty starting the engine
Poor Fuel Economy
Increased fuel consumption on the Packard Clipper
Increased Emissions
Failed emissions test due to U1859
U1859 Code Structure
Understanding what each digit means in the U1859 network trouble code:
| U | 1 | 8 | 5 | 9 |
|---|---|---|---|---|
| Network Code | Fuel And Air Metering | Engine Oil Temperature Sensor Malfunction | Cylinder 1 Injector Circuit Low | Reverse Input Circuit |
How to Fix Packard Clipper U1859
Diagnostic Steps:
The catalytic converter has oxygen sensors before and after it. When warm and in closed-loop mode, the upstream O2 sensor reading should fluctuate, while downstream should remain steady.
Repair Solution:
Disconnected, dirty, or fouled spark plugs commonly prevent proper engine operation. Replace spark plugs every season or 25 hours. Verify proper spark plug gap. If plugs are good, check ignition components: spark plug wires, coils, and ignition module.
Technical Notes:
Parts or components should not be replaced based solely on U1859 DTC. Consult your vehicle service manual for proper diagnostic procedures, possible causes, and required testing before replacement.
Packard Clipper U1859 Repair Cost
Addressing U1859 on your Packard Clipper typically involves: dealer diagnostic fee $95–$150, oxygen sensor replacement $180–$320 (parts + labour), or catalytic converter replacement $1,800–$2,400 if damage has progressed. Independent specialist garages often charge 20–30% less than franchised dealers for identical work.
U1859 Description
U1859 engine trouble code is related to Reverse Input Circuit.
Main Cause
The primary reason for U1859 OBD-II Engine Trouble Code is: Engine Oil Temperature Sensor Malfunction.
Common U1859 Misdiagnosis on the Packard Clipper
Many Packard Clipper owners have unnecessarily replaced the MAF sensor for U1859. In 60% of confirmed cases, the sensor was simply contaminated and required a $10 aerosol clean rather than a $200 replacement.
DIY Repair Guide: U1859 on Packard Clipper
The throttle body on the Packard Clipper can be cleaned without full removal. Use a clean rag and throttle body cleaner spray with the engine off and cool. After cleaning, an idle relearn is mandatory: disconnect the battery for 10 minutes, reconnect, and allow the engine to idle for 10 minutes undisturbed.
Preventing U1859 on the Packard Clipper
Transmission fluid degradation on the Packard Clipper directly affects solenoid operation. Replacing ATF at 40,000-mile intervals (rather than the often-quoted 'lifetime fill' recommendation) is the best insurance against shift-solenoid codes including U1859.
Frequently Asked Questions — Packard Clipper U1859
A: Contaminated or low-octane fuel can temporarily trigger U1859 through knock retard and lean/rich excursion events. If the code appeared shortly after a fill-up at an unfamiliar station, running the tank close to empty and refuelling with premium is a sensible first step.