Ошибка p1128 chrysler

Поздним вечером заправился, поставил на стоянку. Утром словил горящий check engine. Диагностика ключом показала ошибку P1128. Окей, Гугл, wtf is P1128?

P1128 Upstream Heated Oxygen Sensors (HO2Ss) swapped from bank to bank Long Term Fuel Trim Multiplicative (System too Lean)
Показания верхних подогреваемых датчиков кислорода (HO2Ss) на протяжении долгого времени несбалансированы. (слишком бедная смесь)

Понимаю, что 1) наверное сдохла первая лямбда 2) их 2, они одинаковые и не дорогие 3) бедная смесь это для мотора хуже, чем богатая 4) проводка у лямбды с виду целая, контакты в фишке чистые 5) ехать на днях далеко, вопрос нужно решать быстро

В итоге не только из-за машины все планы на день пошли кувырком, целый день катался по городу как дурак.С горящим чеком. А Волге хоть бы хны — едет как обычно.

Забрал лямбду, договорился со вторым сервисом о срочной замене (первый занят был), еду на сервис, приезжаю, замечаю, что погас чек. Зашибись. Ключом покрутил — ошибка осталась.

Пошел к электрику, говорю, давай почитаем сначала машину. Считали только P1128, сбросили, проверили — больше не появилась. Электрик говорит, покатайся, менять будем только если ошибка повторится. Ну ёбушки-воробушки…

Покатался до вечара в режиме «стрит-сракер», ошибка пока не появилась. Вечером под капотом проверил все трубки и фишки, и угадайте, как у меня стоял вот этот…

Итого влетел на зонд и сброс ошибок сканером (не китайским). Зонд можно вернуть обратно (хоть и стыдно — запчасти покупаю по знакомству, и в этот раз просил «сроооч-нооо!»).

С 1 апреля, хозяин!

Update: датчик сдал обратно, т.к. разъем другой. Был бы такой же — оставил бы.
Update2: через месяц добавилась ошибка P0132. Заменил лямбду на оригинал, полет нормальный.

P1128 is a manufacturer-specific troubled code. In the case of the Chrysler Town and Country, it indicates that the engine did not enter “closed-loop” fueling on the bank 1 side.

If any other codes appear with P1128, start with them since this code does NOT indicate what has caused the engine not to go into closed-loop operation.

The most common cause of P1128 is a bad sensor (usually a bad oxygen sensor).

P1128 Definition: Closed Loop Fueling – Not Achieved – Bank 1

P1128 has the same meaning for all Chrysler-made vehicles. Here’s the three-part definition of P1128 in the Chrysler Town and Country:

Closed Loop Fueling

When you start your Town and Country, there are default factory air/fuel mixture settings that run off tables. This is open-loop fueling.

As data is received from the various engine monitoring sensors (O2, MAP, ECT, etc…), the Powertrain Control Module (PCM) uses it to optimize the air/fuel ratio in real-time. This is referred to as closed-loop fueling.

Not Achieved

The engine remains in closed-loop operation, usually due to a failure in one of the sensors mentioned above.

Bank 1

Bank 1 is the side of your Chrysler Town and Country’s engine with the first cylinder. You only need to worry about this if the engine is a “V” type with two cylinder heads. If there’s only one head, you don’t need to concern yourself with locating Bank 1.

On Chrysler engines with two banks, the side with the first cylinder can change depending on your engine. As a rule of thumb, bank one is on the passenger side of the engine on rear-wheel drive cars and trucks. On front-wheel drive vehicles, it’ll be on the opposite side when looking at the engine accessories. You can use this guide from aa1car to verify your engine.

Since P1128 tells you that your Town and Country vehicle has not entered closed loop operation, but not WHY it hasn’t, the symptoms can vary. Here are the common ones:

• Check engine light
• Decreased fuel mileage
• Stuttering or misfire
• Hard to start
• Fuel smell

Chrysler Town and Country P1128: Diagnosis

Check For Other Codes

The first order of business when diagnosing P1128 in the Town and Country is to check for other codes. It is doubtful you’ll get this code without another one being present.

P1128 is telling you the PCM is staying in open-loop mode. There should be another code that states what that issue is (such as P0136).

Oxygen Sensors

A defective upstream O2 sensor is probably the most common cause of P1128.

Oxygen sensors measure the exhaust gasses and are vital to the PCM’s ability to enter closed-loop operation.

A bad oxygen sensor on the bank 1 side is one of the most common causes of P1128. If you have an engine with two banks and an oxygen sensor-related trouble code, you can swap the bank one and bank two codes to see if it “jumps” to the other bank.

O2 Sensor Wiring

Often, a wiring issue can cause an O2 sensor to stop reporting correctly. Cracked, shorted, burnt, or otherwise, damaged wiring can cause it to stop talking to the PCM

MAP/MAF Sensor

The Manifold Absolute Pressure (MAP) sensor measures the air entering your Town and Country’s engine. The PCM can’t enter closed-loop if it’s not correctly calculating the airflow.

Engine Coolant Sensor

A bad ECT sensor can cause P1128 in MOPARS. The PCM adjusts the air/fuel mixture as the vehicle warms up. It can’t enter closed loop if it doesn’t know the vehicle is warm.

Other Causes of P1128

• If there are no other codes, suspect a vacuum or exhaust leak.
• Bad Idle Air Temp sensor
• Fuel pressure (too high or too low)
• Major engine mechanical failure
• Bad PCM (very rare)

Conclusion

A bad oxygen sensor is the most likely cause of P1128 in the Chrysler Town and Country. But, there are many other causes as well. If there are other codes, they can help you narrow it down.