P2626 OBD-II Trouble Code: O2 Sensor Pumping Current Trim Circuit/Open Bank 1 Sensor 1

Our certified mechanics come to you · Get a fair and transparent estimate upfront

Red stars EXCELLENT RATING ON

Cost of diagnosing the P2626 code

P2626 is a diagnostic trouble code (DTC) for "O2 Sensor Pumping Current Trim Circuit/Open Bank 1 Sensor 1". This can happen for multiple reasons and a mechanic needs to diagnose the specific cause for this code to be triggered in your situation. Our certified mobile mechanics can come to your home or office to perform the Check Engine Light diagnostic for $154.99 . Once we are able to diagnose the problem, you will be provided with an upfront quote for the recommended fix and receive $50.0 off as a credit towards the repair. All our repairs are backed by our 12-month / 12,000-mile warranty.

Cars Estimate* Credit towards follow-up repair Earliest Availability
Ford $154.99 $50.0
Toyota $154.99 $50.0
BMW $164.99 $50.0

*Estimates may vary by market

SCHEDULE P2626 DIAGNOSTIC Get a fair and transparent estimate upfront

P2626 Code Definition

The P2626 code is a generic powertrain code related to computer circuit output issues. This code appears when the engine control module (ECM) has received a voltage signal from oxygen sensor number 1 pumping current trim circuit for bank 1 that is not within the accepted variances. This typically means the engine block contained the number 1 cylinder is impacted and a fault has been found in the sensor ahead of the catalytic converter (upstream sensor or sensor 1).

The P2626 code is related to:

What the P2626 Code Means

If a P2626 code appears, your vehicle’s ECM has received a voltage signal from oxygen sensor number 1 pumping current trim circuit for bank 1 that is not within the accepted variances. This typically means the engine block contained the number 1 cylinder is impacted and a fault has been found in the sensor ahead of the catalytic converter (upstream sensor or sensor 1). After reaching normal operating temperature and the ECM reaches closed-loop operations, upstream heater oxygen sensor readings should vary consistently from 100 to 900 millivolts.

It could also be due to an oxygen sensor reading being lower than allowed variances. When the voltage signal variance exceeds 10%, either high or low, the ECM will store a P2626 code. The ECM uses the signals from the oxygen sensor to monitor if the air and fuel mixture is too rich or too lean and increases or decreases the fuel injection duration. A damaged sensor can cause the air/fuel mixture to be too rich or too lean for the engine’s needs.

What Causes the P2626 Code?

The P2626 code is caused by a number of possible issues, including:

  • Damaged or defective oxygen bank 1 sensor 1
  • Damaged, defective, shorted, or open sensor harness
  • Damaged or defective oxygen sensor electrical connectors
  • Faulty or blown fuse for the oxygen sensor
  • Too low or too excessive fuel pressure
  • Possible vacuum leak in the engine
  • Possible exhaust leak
  • Damaged or defective oxygen sensor 1
  • Damaged or faulty ECM (rare)

What are the Symptoms of the P2626 Code?

The symptoms of a P2626 code may include:

  • Warning or Check Engine Light illuminated
  • Possible sputtering or stalling at engine idle
  • Vehicle hesitation during acceleration
  • Poor fuel efficiency
  • Tailpipe may produce black smoke

How Does a Mechanic Diagnose the P2626 Code?

A mechanic may use a variety of methods to diagnose a P2626 code, including:

  • Use an OBD-II scanner to check for a stored P2626 code in the ECM
  • Perform a visual inspection of all wires and connections
  • Check for any damaged or burned wiring harnesses
  • Remove the oxygen sensor, if possible and check for signs of damage
  • Check the sensor readings through the use of a digital volt or ohmeter
  • Test voltages to individual oxygen sensor heater circuits, including both power and ground
  • Clear all codes and test drive the vehicle to see if they reappear

Common Mistakes when Diagnosing the P2626 Code

One common mistake when diagnosing the P2626 code is replacement of the incorrect sensor. Additionally, overlooking and not repairing or replacing damaged wires can result in multiple replacements of the oxygen sensor or related parts. Finally, replacing the oxygen sensor when lean or rich air/fuel mixtures are the actual reason for the code.

How Serious is the P2626 Code?

Because a P2626 code stored in your ECM could result in your vehicle stalling or hesitating during acceleration, causing dangerous driving conditions, YourMechanic considers this a potentially serious issue. Take your vehicle into your local dealer service center of repair shop for diagnosis and repair immediately.

What Repairs can Fix the P2626 Code?

Need Help with a P2626 Code?

YourMechanic offers certified mobile mechanics who will come to your home or office to diagnose and repair your vehicle. Get a quote and book an appointment online or speak to a service advisor at 1-800-701-6230.

Check Engine Light
trouble codes
P2626

No more waiting rooms! Our mechanics will come to you to diagnose and fix the P2626 code.

SCHEDULE P2626 DIAGNOSTIC
Get a $50 credit for the follow-up repair

Recent Check Engine Light is on Inspection reviews

Excellent Rating

(8600)

Rating Summary
8017
273
65
46
199
8017
273
65
46
199
 at YourMechanic

Brandon

9 years of experience
133 reviews
Brandon
9 years of experience
Ford Escort L4-2.0L - Check Engine Light is on - Nashville, Tennessee
Brandon showed up ahead of schedule, was very personable and diagnosed my problems. He also scheduled my next appointments which will be with him.
 at YourMechanic

William

23 years of experience
33 reviews
William
23 years of experience
Lexus IS250 V6-2.5L - Check Engine Light is on - Mableton, Georgia
Arrived early which was great. William was courteous, and attentive to the issue. Even though it took several attempts I'm so happy he was determined to fix it and he did!
 at YourMechanic

Dan

40 years of experience
1080 reviews
Dan
40 years of experience
Plymouth Grand Voyager - Check Engine Light is on - Lawrenceville, Georgia
Mr. Dan Barber was quite patient, courteous and quite knowledgeable. From my observation, Mr. Barber appears to be quite professional.
 at YourMechanic

Christopher

9 years of experience
120 reviews
Christopher
9 years of experience
Ford Fiesta L4-1.6L - Check Engine Light is on - Smyrna, Georgia
Chris communicated with us each step of the way up until his arrival. He listened well, was knowledgeable, and was prepared. He took the time to diagnose the problem, explained the what, why and how and provided a solution. I would definitely recommend him and will use him again.


Related questions

2006 Kia spectra stops shifting seemingly randomly.
Hi there. The transmission may have a failed harness or a failed computer (TCM). With having all of the shift solenoids and the torque converter clutch not functioning correctly, then there is a connection error. Remove the harness to the...

More related articles

P2264 OBD-II Trouble Code: Water in Fuel Sensor Circuit
P2264 P2264 code definition Water in Fuel Sensor Circuit What the P2264 code means P2264 is an OBD-II generic code for the engine control module (ECM) detecting the water in fuel sensor circuit voltage falling below or exceeding the specified...
P0374 OBD-II Trouble Code: Timing Reference High Resolution Signal A No Pulses
What What the P0374 code means The Powertrain Control Module (PCM) has discovered a problem in the high-resolution timing reference signal. What causes the P0374 code? There may be one or more causes for the P0374 code: A defective camshaft,...
P2767 OBD-II Trouble Code: Input/Turbine Speed Sensor B Circuit No Signal
P2767 means there is a problem in the input or turbine speed sensor B due to faulty sensors or solenoids, an electrical issue or transmission fluids.

How can we help?

Our service team is available 7 days a week, Monday - Friday from 6 AM to 5 PM PST, Saturday - Sunday 7 AM - 4 PM PST.

1 (855) 347-2779 · hi@yourmechanic.com