2014 Jeep Wrangler Repair Guides

P0133 relates to an oxygen sensor malfunction in your 2014 Jeep Wrangler's exhaust system. The upstream sensors on Bank 1 monitor catalytic converter efficiency while downstream sensors check emissions. On 2018+ Wranglers with the 2.0L turbo PHEV, the O2 sensors also monitor hybrid battery ventilation.

P0134 relates to an oxygen sensor malfunction in your 2014 Jeep Wrangler's exhaust system. The upstream sensors on Bank 1 monitor catalytic converter efficiency while downstream sensors check emissions. On 2018+ Wranglers with the 2.0L turbo PHEV, the O2 sensors also monitor hybrid battery ventilation.

P0135 relates to an oxygen sensor malfunction in your 2014 Jeep Wrangler's exhaust system. The upstream sensors on Bank 1 monitor catalytic converter efficiency while downstream sensors check emissions. On 2018+ Wranglers with the 2.0L turbo PHEV, the O2 sensors also monitor hybrid battery ventilation.

P0137 relates to an oxygen sensor malfunction in your 2014 Jeep Wrangler's exhaust system. The upstream sensors on Bank 1 monitor catalytic converter efficiency while downstream sensors check emissions. On 2018+ Wranglers with the 2.0L turbo PHEV, the O2 sensors also monitor hybrid battery ventilation.

The ignition system fault code P0353 affects your 2014 Wrangler's spark delivery. On the 3.6L Pentastar, each cylinder has a dedicated ignition coil. The 2.0L turbo PHEV uses a different ignition system integrated with the hybrid motor. Off-road vibrations can loosen ignition components on Wranglers used for serious trails.

The ignition system fault code P0354 affects your 2014 Wrangler's spark delivery. On the 3.6L Pentastar, each cylinder has a dedicated ignition coil. The 2.0L turbo PHEV uses a different ignition system integrated with the hybrid motor. Off-road vibrations can loosen ignition components on Wranglers used for serious trails.

The ignition system fault code P0355 affects your 2014 Wrangler's spark delivery. On the 3.6L Pentastar, each cylinder has a dedicated ignition coil. The 2.0L turbo PHEV uses a different ignition system integrated with the hybrid motor. Off-road vibrations can loosen ignition components on Wranglers used for serious trails.

The ignition system fault code P0356 affects your 2014 Wrangler's spark delivery. On the 3.6L Pentastar, each cylinder has a dedicated ignition coil. The 2.0L turbo PHEV uses a different ignition system integrated with the hybrid motor. Off-road vibrations can loosen ignition components on Wranglers used for serious trails.

The evaporative emissions fault code P0452 affects your 2014 Wrangler's fuel vapor recovery system. This system captures gasoline vapors and prevents them from escaping into the atmosphere. On Wranglers with the removable top and doors, the gas cap seal is critical for EVAP system integrity. Dust and debris from trails can damage EVAP lines.

The evaporative emissions fault code P0453 affects your 2014 Wrangler's fuel vapor recovery system. This system captures gasoline vapors and prevents them from escaping into the atmosphere. On Wranglers with the removable top and doors, the gas cap seal is critical for EVAP system integrity. Dust and debris from trails can damage EVAP lines.

The evaporative emissions fault code P0454 affects your 2014 Wrangler's fuel vapor recovery system. This system captures gasoline vapors and prevents them from escaping into the atmosphere. On Wranglers with the removable top and doors, the gas cap seal is critical for EVAP system integrity. Dust and debris from trails can damage EVAP lines.

P0455 indicates an engine coolant temperature sensor issue in your 2014 Jeep Wrangler. The ECT sensor tells the PCM when the engine is at operating temperature. On the Wrangler, this affects the cooling fan operation, idle speed, and fuel mixture enrichment during warm-up. The 3.6L Pentastar has two ECT sensors for redundancy.

P0534 indicates an air conditioning system fault in your 2014 Jeep Wrangler. The A/C system on Wranglers with the Max Air package includes a high-capacity compressor. On Rubicon models used in hot climates, the A/C system works harder due to increased solar heat load through the freedom top panels.

The secondary air injection fault code P0540 affects your 2014 Wrangler's cold start emissions system. This system injects air into the exhaust to help the catalytic converter reach operating temperature faster. On Wranglers frequently used for short trips, a failing AIR pump may not trigger until the engine barely warms up.

The secondary air injection fault code P0541 affects your 2014 Wrangler's cold start emissions system. This system injects air into the exhaust to help the catalytic converter reach operating temperature faster. On Wranglers frequently used for short trips, a failing AIR pump may not trigger until the engine barely warms up.

The secondary air injection fault code P0542 affects your 2014 Wrangler's cold start emissions system. This system injects air into the exhaust to help the catalytic converter reach operating temperature faster. On Wranglers frequently used for short trips, a failing AIR pump may not trigger until the engine barely warms up.

P0625 indicates a charging system issue in your 2014 Jeep Wrangler. The Wrangler's alternator must handle high electrical loads from aftermarket lights, winches, and accessories common on trail rigs. On 4xe PHEV models, the integrated starter-generator is part of the hybrid system's 48-volt network.

P0626 indicates a charging system issue in your 2014 Jeep Wrangler. The Wrangler's alternator must handle high electrical loads from aftermarket lights, winches, and accessories common on trail rigs. On 4xe PHEV models, the integrated starter-generator is part of the hybrid system's 48-volt network.

The fuel system fault code P0627 affects your 2014 Wrangler's fuel delivery system. This could involve the high-pressure fuel pump on the 3.6L Pentastar, direct injectors on the 2.0L turbo, or the fuel level sender. On 4xe PHEV models, this also relates to the hybrid fuel system integration.

The fuel system fault code P0628 affects your 2014 Wrangler's fuel delivery system. This could involve the high-pressure fuel pump on the 3.6L Pentastar, direct injectors on the 2.0L turbo, or the fuel level sender. On 4xe PHEV models, this also relates to the hybrid fuel system integration.

P0731 indicates an engine coolant temperature sensor issue in your 2014 Jeep Wrangler. The ECT sensor tells the PCM when the engine is at operating temperature. On the Wrangler, this affects the cooling fan operation, idle speed, and fuel mixture enrichment during warm-up. The 3.6L Pentastar has two ECT sensors for redundancy.

P0732 indicates an engine coolant temperature sensor issue in your 2014 Jeep Wrangler. The ECT sensor tells the PCM when the engine is at operating temperature. On the Wrangler, this affects the cooling fan operation, idle speed, and fuel mixture enrichment during warm-up. The 3.6L Pentastar has two ECT sensors for redundancy.

P0733 indicates an engine coolant temperature sensor issue in your 2014 Jeep Wrangler. The ECT sensor tells the PCM when the engine is at operating temperature. On the Wrangler, this affects the cooling fan operation, idle speed, and fuel mixture enrichment during warm-up. The 3.6L Pentastar has two ECT sensors for redundancy.

P0734 indicates an engine coolant temperature sensor issue in your 2014 Jeep Wrangler. The ECT sensor tells the PCM when the engine is at operating temperature. On the Wrangler, this affects the cooling fan operation, idle speed, and fuel mixture enrichment during warm-up. The 3.6L Pentastar has two ECT sensors for redundancy.

The throttle control fault code P1518 affects drive-by-wire operation in your 2014 Wrangler. Electronic throttle bodies on modern Wranglers can suffer from carbon buildup affecting throttle plate position. On 4xe models, throttle operation is coordinated with regenerative braking and hybrid motor engagement.

The throttle control fault code P1519 affects drive-by-wire operation in your 2014 Wrangler. Electronic throttle bodies on modern Wranglers can suffer from carbon buildup affecting throttle plate position. On 4xe models, throttle operation is coordinated with regenerative braking and hybrid motor engagement.

The throttle position sensor fault code P1520 affects drive-by-wire throttle operation in your 2014 Wrangler. Modern Wranglers use an electronic throttle body with integrated TPS. This code can cause reduced power, poor throttle response, and illuminated fault lights. On Rubicon models with off-road demands, proper throttle response is critical.

The communication fault code U0117 affects module-to-module data exchange in your 2014 Wrangler. Jeep's Uconnect system, ABS module, and powertrain control all communicate via the CAN bus. On 4xe PHEV models, the hybrid control module adds additional communication paths that can fail.

The fuel system fault code U0118 affects your 2014 Wrangler's fuel delivery system. This could involve the high-pressure fuel pump on the 3.6L Pentastar, direct injectors on the 2.0L turbo, or the fuel level sender. On 4xe PHEV models, this also relates to the hybrid fuel system integration.

The communication fault code U0119 affects module-to-module data exchange in your 2014 Wrangler. Jeep's Uconnect system, ABS module, and powertrain control all communicate via the CAN bus. On 4xe PHEV models, the hybrid control module adds additional communication paths that can fail.