Mitsubishi Rvr P1629 Engine Trouble Code
What is Mitsubishi Rvr P1629?
Mitsubishi Rvr P1629 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.
P1629 on the Mitsubishi Rvr
Service bulletins for the Mitsubishi Rvr specifically mention P1629 as a symptom of failed purge solenoid valves in the EVAP system. The solenoid body on this platform degrades in high-humidity environments and should be inspected whenever this code appears.
Code Information
| Code Type: | OBD-II Powertrain (P) Trouble Code |
| System: | Powertrain |
| Vehicle: | Mitsubishi Rvr |
| Brand: | Mitsubishi |
| Model: | Rvr |
| Code: | P1629 |
P1629 Mitsubishi Rvr Symptoms
Check Engine Light
Illuminated Mitsubishi Rvr dashboard warning
Engine Stalling
Engine stops unexpectedly or misfires
Performance Issues
Reduced power or acceleration on the Mitsubishi Rvr
Starting Problems
Difficulty starting the engine
Poor Fuel Economy
Increased fuel consumption on the Mitsubishi Rvr
Increased Emissions
Failed emissions test due to P1629
P1629 Code Structure
Understanding what each digit means in the P1629 powertrain trouble code:
| P | 1 | 6 | 2 | 9 |
|---|---|---|---|---|
| Powertrain Code | Fuel And Air Metering | Fuel Temperature Sensor B Circuit Range/Performance | Turbocharger Boost Sensor A Circuit Low | Reverse Input Circuit |
How to Fix Mitsubishi Rvr P1629
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:
Excessive air inflow may result from vacuum leaks, dirty sensors, or EGR valves not closing properly. Insufficient fuel can stem from dirty injectors, clogged filters, weak fuel pump, or leaking pressure regulator.
Technical Notes:
P1629 DTCs can be triggered by upstream issues. For example, a dirty MAF sensor may cause incorrect fuel-trim adjustments, leading oxygen sensors to report mixture problems. Address root causes first.
Mitsubishi Rvr P1629 Repair Cost
ECU software update for the Mitsubishi Rvr to resolve the P1629 calibration bug is performed free of charge at a franchised Mitsubishi dealer under the technical service bulletin programme. Always confirm the ECU part number and current flash version before spending money on sensors.
P1629 Description
P1629 engine trouble code is related to Reverse Input Circuit.
Main Cause
The primary reason for P1629 OBD-II Engine Trouble Code is: Fuel Temperature Sensor B Circuit Range/Performance.
Common P1629 Misdiagnosis on the Mitsubishi Rvr
On the Mitsubishi Rvr, the EGR cooler is sometimes replaced for P1629 when the EGR valve position sensor is at fault. The two components share a fault pathway in older scan tools that do not display live EGR valve position data.
DIY Repair Guide: P1629 on Mitsubishi Rvr
Battery terminal cleaning on the Mitsubishi Rvr is a 5-minute job that resolves a surprising number of P1629 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 P1629 on the Mitsubishi Rvr
Using only genuine or OEM-specification fuel injectors in the Mitsubishi Rvr ensures precise spray pattern and flow rate. Inferior aftermarket injectors are a documented trigger for P1629 through off-target fuel delivery.
Frequently Asked Questions — Mitsubishi Rvr P1629
A: Temporarily clearing P1629 can help determine whether it is intermittent or persistent, but it does not fix the underlying fault. The code will return if the problem is still present. Do not clear codes just before an emissions test without a proper drive cycle.