Daihatsu Kopen P1642 Engine Trouble Code
What is Daihatsu Kopen P1642?
Daihatsu Kopen P1642 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.
P1642 on the Daihatsu Kopen
In cold climates, Daihatsu Kopen vehicles frequently log P1642 during the first winter of ownership. Condensation inside the throttle body creates a temporary short circuit in the position sensor wiring, which clears once the engine warms up — but the fault code remains stored.
Code Information
| Code Type: | OBD-II Powertrain (P) Trouble Code |
| System: | Powertrain |
| Vehicle: | Daihatsu Kopen |
| Brand: | Daihatsu |
| Model: | Kopen |
| Code: | P1642 |
P1642 Daihatsu Kopen Symptoms
Check Engine Light
Illuminated Daihatsu Kopen dashboard warning
Engine Stalling
Engine stops unexpectedly or misfires
Performance Issues
Reduced power or acceleration on the Daihatsu Kopen
Starting Problems
Difficulty starting the engine
Poor Fuel Economy
Increased fuel consumption on the Daihatsu Kopen
Increased Emissions
Failed emissions test due to P1642
P1642 Code Structure
Understanding what each digit means in the P1642 powertrain trouble code:
| P | 1 | 6 | 4 | 2 |
|---|---|---|---|---|
| Powertrain Code | Fuel And Air Metering | Fuel Temperature Sensor B Circuit Range/Performance | Injection Pump Fuel Metering Control 'B' High | Glow Plug/Heater Circuit 'A' Malfunction |
How to Fix Daihatsu Kopen P1642
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:
Most manufacturers number cylinders sequentially from front to back. Ford V-engines start with cylinder 1 at front left. In V-6 engines, cylinder 4 is front right; in V-8 engines, cylinder 5 occupies that position.
Technical Notes:
For P1642, verify VCT solenoid operation. Look for stuck or sticking valves caused by contamination. Consult vehicle-specific repair manual for proper component testing procedures.
Daihatsu Kopen P1642 Repair Cost
Torque converter clutch solenoid replacement on the Daihatsu Kopen — relevant for owners who tow regularly — costs $280–$480. A full transmission fluid change ($120–$160) at the same service is recommended because contaminated fluid accelerates solenoid wear.
P1642 Description
P1642 engine trouble code is related to Glow Plug/Heater Circuit 'A' Malfunction.
Main Cause
The primary reason for P1642 OBD-II Engine Trouble Code is: Fuel Temperature Sensor B Circuit Range/Performance.
Common P1642 Misdiagnosis on the Daihatsu Kopen
Replacing the PCM/ECU on the Daihatsu Kopen for a persistent P1642 is a last-resort action that is often performed prematurely. Statistically, less than 2% of P1642 faults on this platform originate in the ECU; wiring, sensors, and mechanical causes account for the remainder.
DIY Repair Guide: P1642 on Daihatsu Kopen
Battery terminal cleaning on the Daihatsu Kopen is a 5-minute job that resolves a surprising number of P1642 intermittents. Use a wire brush and a bicarbonate of soda solution to clean corrosion, then apply a thin coat of petroleum jelly to the terminals after refitting.
Preventing P1642 on the Daihatsu Kopen
For Daihatsu Kopen owners in high-humidity climates, applying electrical contact cleaner and dielectric grease to the ECU connector pins every two years prevents the corrosion-related signal errors that register as P1642.
Frequently Asked Questions — Daihatsu Kopen P1642
A: Yes. Some fault conditions, particularly those involving EVAP system leaks or marginal sensor readings, store codes without producing noticeable drivability symptoms. These are called memory faults and still need to be addressed because they will eventually cause performance issues.