Category: Jeep

This is where you’ll find codes specifically for your Jeep. Jeep has been around since 1943 and is a very popular and renowned brand in the American Market stemming back to the second World War. Some of their most popular makes are the Wrangler and Grand Cherokee. In this section, we will cover the most common trouble codes for Jeep, and explain what they mean, the symptoms, the cause, the severity, and we will walk you through basic diagnostic steps. If the issue that you are having is not covered in this section, see our other DTC categories for general codes and issues.

Jeep P0128 – Meaning, Causes, Symptoms, & Fixes

Jeep Code P0128 Definition Coolant thermostat temperature below regulating temperature Jeep  Code P0128 Meaning The powertrain control module (PCM) tracks how long it takes for the engine of your Jeep to reach and maintain the correct operating temperature. When the correct engine operating temperature is reached, the powertrain control module orders the fuel system to enter “closed...

P0128
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