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Jeep Gladiator Fault Codes


You can find common Jeep Gladiator fault codes on this page that when clicked take you to a detailed description.

You can also type in the fault code you are getting below to find a more detailed description.

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Do you know the fault code already? Enter it in the box below and hit "Search Codes".

Jeep Gladiator Recalls

When a car manufacturer detects a problem with a model they put out a recall notice and more often than not offer to fix the problem free of charge.

You can check to see if your Jeep Gladiator has any recall notices on our sister site AutoRecalls.co, sorted by model year.

View Jeep Gladiator Recalls »
Recall Notice Icon
Severity Icon 9/10

Error Icon P0300

Random/Multiple Cylinder Misfire Detected

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Severity Icon 3/10

Error Icon P0456

Evaporative Emissions System Small Leak Detected

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Severity Icon 8/10

Error Icon P0304

Cylinder 4 Misfire Detected

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Severity Icon 3/10

Error Icon P0441

Evaporative Emission Control System Incorrect Purge flow

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Error Icon P0406

Exhaust Gas Recirculation Sensor A Circuit High

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Severity Icon 6/10

Error Icon P0141

O2 Sensor Heater Circuit Malfunction (Bank 1 Sensor 2)

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Error Icon P0122

Throttle/Pedal Position Sensor/Switch A Circuit Low Input

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Severity Icon 7/10

Error Icon P0171

System Too Lean (Bank 1)

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Severity Icon 7/10

Error Icon P0420

Catalyst System Efficiency Below Threshold (Bank 1)

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Severity Icon 4/10

Error Icon P0128

Coolant Thermostat (Coolant Temp Below Thermostat Regulating Temperature)

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Error Icon P0218

Transmission Over Temperature Condition

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Error Icon P0740

Torque Converter Clutch Circuit Malfunction

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Severity Icon 9/10

Error Icon P0700

Transmission Control System Malfunction

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Error Icon U0101

Lost Communication with TCM

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Error Icon U0164

Lost Communication With HVAC Control Module

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Severity Icon 7/10

Error Icon P0401

Exhaust Gas Recirculation Flow Insufficient Detected

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Error Icon P0116

Engine Coolant Temperature Circuit Range/Performance Problem

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Error Icon P0161

O2 Sensor Heater Circuit Malfunction (Bank 2 Sensor 2)

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Error Icon P0121

Throttle/Pedal Position Sensor/Switch A Circuit Range/Performance Problem

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Error Icon P0760

Shift Solenoid C Malfunction

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Error Icon P0765

Shift Solenoid D Malfunction

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Severity Icon 3/10

Error Icon P0507

Idle Control System RPM higher Than Expected

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Error Icon P0746

Pressure Control Solenoid Performance or Stuck Off

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Error Icon P0720

Output Speed Sensor Circuit Malfunction

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Error Icon B1648

Seat Driver Recline Forward Circuit Open

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Error Icon B1640

Mirror Passenger Left Circuit Open

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Error Icon P1648

Engine control module (ECM) – self-test malfunction

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Error Icon P1128

Upstream Heated O2 Sensors Swapped

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Severity Icon 4/10

Error Icon P0455

System Gross Leak Evaporative Emission

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Error Icon P0520

Engine Oil Pressure Sensor/Switch Circuit Malfunction

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Severity Icon 3/10

Error Icon P0442

Evaporative Emission Control System Leak Detected

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Severity Icon 8/10

Error Icon P0305

Cylinder 5 Misfire Detected

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Error Icon B2224

Mirror Passenger Drive Circuit Failure

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Severity Icon 3/10

Error Icon P0440

Evaporative Emission Control System Malfunction

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Error Icon P0702

Transmission Control System Electrical

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Error Icon P0108

Manifold Absolute Pressure/Barometric Pressure Circuit High Input

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Severity Icon 8/10

Error Icon P0303

Cylinder 3 Misfire Detected

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Error Icon P0344

Camshaft Position Sensor Circuit Intermittent

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Severity Icon 8/10

Error Icon P0301

Cylinder 1 Misfire Detected

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Severity Icon 6/10

Error Icon P0158

O2 Sensor Circuit High Voltage (Bank 2 Sensor 2)

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Error Icon P0600

Serial Communication Link Malfunction

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Severity Icon 7/10

Error Icon P0430

Catalyst System Efficiency Below Threshold (Bank 2)

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Error Icon P0513

Incorrect Immobilizer Key

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Severity Icon 6/10

Error Icon P0138

O2 Sensor Circuit High Voltage (Bank 1 Sensor 2)

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Error Icon P1391

Intermittent Loss of CMP or CKP

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Error Icon P1494

Leak Detection Pump Switch or Mechanical Fault

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Error Icon P1281

Engine Is Cold Too Long

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Error Icon P1129

Downstream Heated O2 Sensors Swapped

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Error Icon P1491

Rad Fan Control Relay Circuit

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Error Icon P1685

Skim Invalid Key

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Severity Icon 7/10

Error Icon P0010

Intake Camshaft Position Actuator Circuit / Open (Bank 1)

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Severity Icon 9/10

Error Icon P0011

Intake Camshaft Position Timing - Over-Advanced (Bank 1)

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Severity Icon 9/10

Error Icon P0012

Intake Camshaft Position Timing - Over-Retarded (Bank 1)

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Severity Icon 7/10

Error Icon P0013

Exhaust Camshaft Position Actuator Circuit / Open (Bank 1)

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Severity Icon 8/10

Error Icon P0014

Exhaust Camshaft Position Timing - Over-Advanced (Bank 1)

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Severity Icon 8/10

Error Icon P0016

Crankshaft Position Camshaft Position Correlation Bank 1 Sensor A

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Severity Icon 8/10

Error Icon P0017

Crankshaft Position Camshaft Position Correlation Bank 1 Sensor B

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Severity Icon 4/10

Error Icon P0036

Heated Oxygen Sensor (HO2S) Heater Control Circuit Bank 1 Sensor 2

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Severity Icon 4/10

Error Icon P0102

Mass or Volume Air Flow Circuit Low Voltage Input

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Severity Icon 8/10

Error Icon P0106

Manifold Absolute Pressure/Barometric Pressure Circuit Range/Performance Problem

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Severity Icon 8/10

Error Icon P0113

Intake Air Temperature Circuit High Input

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Severity Icon 6/10

Error Icon P0131

O2 Sensor Circuit Low Voltage (Bank 1 Sensor 1)

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Severity Icon 7/10

Error Icon P0134

O2 Sensor Circuit No Activity Detected (Bank 1 Sensor 1)

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Severity Icon 6/10

Error Icon P0135

O2 Sensor Heater Circuit Malfunction (Bank 1 Sensor 1)

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Severity Icon 4/10

Error Icon P0137

O2 Sensor Circuit Low Voltage (Bank 1 Sensor 2)

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Severity Icon 5/10

Error Icon P0172

System Too Rich (Bank 1)

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Severity Icon 5/10

Error Icon P0175

System Too Rich (Bank 2)

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Severity Icon 8/10

Error Icon P0302

Cylinder 2 Misfire Detected

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Severity Icon 8/10

Error Icon P0306

Cylinder 6 Misfire Detected

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Severity Icon 3/10

Error Icon P0325

Knock Sensor 1 Circuit (Bank 2 or Single Sensor)

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Severity Icon 8/10

Error Icon P0332

Knock Sensor 2 Circuit Low Input (Bank 2)

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Severity Icon 8/10

Error Icon P0335

Crankshaft Position Sensor A Circuit Malfunction

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Severity Icon 6/10

Error Icon P0341

Camshaft Position Sensor Circuit Range/Performance

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Severity Icon 3/10

Error Icon P0446

Evaporative Emission Control System Vent Control Circuit Malfunction

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Severity Icon 4/10

Error Icon P0449

Evaporative Emission Control System Vent Valve/Solenoid Circuit Malfunction

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Severity Icon 5/10

Error Icon P0463

Fuel Level Sensor Circuit High Input

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Jeep Gladiator Image
  • Manufacturer: Jeep

About the Gladiator

The Jeep Gladiator entered the market only a few years ago in 2020. It represents a pickup truck version of the iconic SUV which it takes inspiration from – the iconic Jeep Wrangler.

Jeep had originally manufactured a pickup truck under the same name between 1962 and 1988. Despite being released in 2020, the concept for a revival of the model was unveiled in 2004.

The model has competed with the Wrangler since its release because of their similarities. Competition from outside of Jeep has included the Ford Ranger, Chevrolet Colorado, Nissan Frontier, and Toyota Tacoma.

Despite being a new model, the Gladiator is fitted with engines that have been around for a while. This means they are prone to some well-known issues. The first and most common is P0300, which indicates that multiple random misfires have occurred recently.

This issue is so common that Jeep released a technical service bulletin to address it. Models manufactured in 2021 typically require a new set of spark plugs, which solves the issue.

In addition to this, P0304 is a fairly commonly searched issue. This code indicates that a misfire has occurred in the fourth cylinder.

If these two codes were logged together, a new set of spark plugs will likely be the solution.

The next most common fault code is one that many American vehicles log. Fault code P0456 indicates that a small leak in the EVAP system has been detected.

Thankfully, this is most often caused by a loose or defective fuel cap. In some cases, the cap needs to be replaced if it cannot form a proper seal. However, some Gladiator owners have reported that the purge valve can become stuck easily.