P0155 chevy astro van. 3L, or 6. Learn what O2 Sensor ...

P0155 chevy astro van. 3L, or 6. Learn what O2 Sensor Heater Circuit Malfunction Bank 2 Sensor 1 means, location and how to repair. Now im getting a p0155 code. Here's exactly what you need to do to fix it. Astro Vans Only Ricky Swazo󰞋Dec 10, 2025󰞋󱟠 󳄫 All right I have a question for who I know I went for emissions and my Astro vans kicking off these codes with anybody know what these codes are co gpm co2 gpm hc gpm nox gpm Code P0155 stands for Oxygen O2 Sensor Heater Circuit Malfunction (Bank 2, Sensor 1). Just recently this last week, it blew the ECMI fuse … read more 2004 Chevy Astro AWD P0155 Oxygen Sensor Code Fix Astro AWD often faces recurring oxygen sensor codes and catalytic converter failures causing check engine lights. There’s good news if you have a code P0155 though, it’s not that serious and shouldn’t cost you a ton to fix. Although generic, the specific repair steps may vary depending on make/model. Detailed repair manual for the 1999 Chevrolet Astro Van L AWD V6-4. Here’s what it means, its causes, and how to properly troubleshoot and fix it. Watch short videos about chevy astro van restoration from people around the world. Next, duplicate the code setting conditions on a test drive, paying particular attention to load, MPH, and RPM. Replacing downstream oxygen sensor on the 1997 Safari. Symptoms include On a 1997 with 4 O2 sensors, P0155 is HO2S Heater Circuit Bank 2 Sensor 1. This tutorial will help you to test diagnostic trouble codes P0135 and P0155 on specific Chevy and GMC Pickups, Vans, and SUVs with either a 4. I have a 2003 Chev Astro van with AWD. Hello, My '99 Chevy Astro cargo van is having a problem. I noticed my temp guage is reading at about 105°. Jan 3, 2026 · Understanding the P0155 code is just the beginning, as you'll need to diagnose the root cause to restore your engine's peak performance. The fuel pump and fuel filter were replaced about 3 months ago. com. * Occasional hard starts - you crank and crank and crank and no start. Ive replaced the bank 2 sensor 1 O2 sensor. P0155 O2 Sensor Heater Circuit Malfunction (B2S1) OBD-II Trouble Code Technical Description O2 Sensor Heater Circuit Malfunction (Bank 2 Sensor 1) What does that mean? This diagnostic trouble code (DTC) is a generic powertrain code, which means that it applies to OBD-II equipped vehicles. 3L V6 2WD. This video offers an explanation of how to investigate and fix a vehicle with a check engine light that arises as a result of a problem with one of the oxyge P0155 code indicates a problem with the oxygen (O2) sensor heater circuit for bank 2, sensor 1. Symptoms include Code P0135 Chevrolet Description The P0135 code for Chevrolet vehicles indicates a problem with the HO2S (Heated Oxygen Sensor) heater performance in Bank 1 Sensor 1. Fix Engine Code CHEVROLET P0155 Easy DIY Method A | The Oxygen Sensor (1) Inspect the Oxygen Sensor (2) Replace the Oxygen Sensor The components displayed in this video are generic components that Had a 420 code. Conditions for setting this code are: ECT and IAT below 32*C. Due to the high mileage of my astro van, along with various obd ll codes related to the oxygen sensors, I replaced the catalytic converter along with the Y pipe it is welded to. https://www. I'm getting code P155, which is the code for a faulty heater in the Bank 2, sensor 1 O2 Does someone know if this Chiltons wire diagram ("1994 and later") is accurate for a 2002 Vin X? I'm looking into a P0135 and P0155 O2 heater malfunctions Detailed repair manual for the 1996 Chevrolet Astro Van L AWD V6-4. I have replaced both bank 2 12/4/10. Learn symptoms, diagnostic tips, and solutions at RepairPal. Pretty much at my wits end. P0155 means the powertrain control module tests the upstream heated oxygen sensor’s heater circuit on Bank 2 Sensor 1 and detects a short in the circuit or excessive resistance in the heater My '99 Chevy Astro cargo van is having a problem. Replaced the CAT. 3L V6 - 168K - LOCAL TRADE & RUNS GREAT! This is a NICE condition and RECENTLY PA safety & emission inspected 2004 CHEVY ASTRO Ext Cargo Van and The P0155 trouble code is triggered when the powertrain control module (PCM) monitors a short in circuit or excessive resistance in the heater circuit of your vehicle’s Bank 2 heated oxygen sensor. Do I replace the sensor or is there a hidden issue that I need to take care of? I have a 2003 Chev Astro van with AWD. com/The_mech_a_nicor my paypal http A P0155 engine code is triggered when your engine’s power control module (PCM) identifies a problem with its connection to your vehicle’s heated oxygen sensors. This code refers to the OBD-II Trouble Code Technical Description Evaporative Emission Control System Purge Control Valve Circuit What does that mean? This diagnostic trouble code (DTC) is a generic powertrain code, which means that it applies to OBD-II equipped vehicles. Which is Good evening, 2000 Astro 2WD with only "P0155" and "P0155 Pending" Codes. ” It is triggered when the vehicle’s computer or the engine control module (ECM) detects an unexpected voltage condition or excessive current draw on the heater circuit of your vehicle’s Bank 2 HO2. This sensor is responsible for monitoring the oxygen levels in the exhaust gases and providing feedback to the engine control module to adjust the air-fuel mixture for optimal combustion. Even after replacing the sensor, check the wiring harness for damage or corrosion. Jun 7, 2020 · 140 is saying Bank 1, sensor 2 but I don't see this even indicated on an astro. * OBDII codes of * P0300 ( misfires on various cylinders ) * and P0155 ( malfunction of R/H oxygen sensor heater ) Discover more answers 2003 chevy astro van throwing code p0155 even after i changed pre-converter O2 sensor. Symptoms include * Intermittant stumbling off idle, at low RPMS and loads. If a MECH A NIC video helped you consider donating to my patreon account to help support the channel. ORIt might be time to just sell it? Good luck [/QUOTE] 2000 Astro LS 4x4 | NP233 | 31" LT265/70R17 Tires | 8" LIFT | 10" TOTAL 92 Chevy Astro Cargo Shorty | V8-350 Reply Like jn. It is normally P0155 and P0161 and they come on pretty reliably after about 10 minutes of driving, so regular that they show up at almost the exact same spot on my daily commute in the morning. 3L VIN W. P0155 indicates a heater circuit fault in the oxygen sensor. 2003 chevy astro van throwing code p0155 even after i changed pre-converter O2 sensor. For the past month I've been getting codes on the bank 2 O2 sensors. My '99 Chevy Astro cargo van is having a problem. 10 voltage point, indicating a problem with the fuel control s a quick question: i have 3 o2 sensors on my van. The reason that it is treated as such is that this code negatively affects the drivability of the vehicle. Fix Engine Code P0155 Easy DIY Method A | The Oxygen Sensor (1) Inspect the Oxygen Sensor (2) Replace the Oxygen Sensor Related Codes and Their Repairing Methods: P0141: • How to Fix P0141 P0135 and P0155 Diagnostic Theory for Shops and Technicians: Oxygen Sensor Heater Circuit When the code P0135 or P0155 is set, record the freeze frame data in fine detail. This indicates the PCM has detected a problem with the bank 2 oxygen sensor. Discover more answers 2003 chevy astro van throwing code p0155 even after i changed pre-converter O2 sensor. The P0155 code indicates a heater circuit malfunction in the downstream O2 sensor. It's running better, but the check engine light came back on and is still setting a PO138 c The P0155 trouble code technically means "Oxygen O2 Sensor Heater Circuit Malfunction (Bank 2, Sensor 1)". I have a 1999 Chevy Astro Van 4. * OBDII codes of * P0300 ( misfires on various cylinders ) * and P0155 ( malfunction of R/H oxygen sensor heater ) The P0155 code occurs when the Power Control Module (PCM) tests the upstream heated oxygen sensor’s circuit on Bank 2, or one side of a V-configured engine like a V6 or a V8, and detects a short Hello, My '99 Chevy Astro cargo van is having a problem. . Naturally I changed the O2 Sensor with Bosch. The problem first started I can't even BEGIN to imagine burning thru this much money on an old van. says monitor is pending. The ECT Sensor parameter is more than 50°C (122°F). 0L V8. 8L, 5. How to fix P0155 Code: Oxygen Sensor Heater Circuit Malfunction (Bank 2, Sensor 1)An oxygen sensor monitors how much oxygen was burnt off during combustion. are they all the same? alao, the denso o2 sensors are under 40$ i assumed they would be $100 apiece. Despite replacing sensors and catalytic converters, wiring issues or connector corrosion may cause code recurrence. 2004 CHEVY ASTRO EXT CARGO VAN - RWD - 4. Symptoms include This tutorial will help you to test diagnostic trouble codes P0135 and P0155 on specific 2003, 2004, and 2005 Chevy and GMC Pickups, Vans, and SUVs with either a 4. patreon. Calendar AutoTech Club -> Drivability Corner -> 2000 Chevy Astro Van- MIL on and flashing Start A New Topic Reply After reading a lot really good of posts on this forum, that have helped me with my 2001 astro van over the years, I hate to post such a newbie question, but I've got an o2 sensor issue that has me stumped. Its has about 189K miles and has been a great ride. Repair Information for P0155 code. I see Bank 1, Sensor 1 as upstream driver, Bank 2 sensor 1 as upstream passenger (what I already changed) and then the downstream as bank 2, sensor 2. am i missing something? Learn how to diagnose and fix the P0155 O2 sensor error in your Chevrolet Silverado with expert tips. This particular sensor plays a crucial role in monitoring exhaust emissions and helping the ECU manage fuel efficiency. Symptoms include Chevy Astro Van: I have a 1999 Chevy Astro Van 4. I still cant get the CAT and EGR monitors ready no matter how many times ive completed the drive cycles. The P0155 Chevrolet diagnostic trouble code indicates an issue with the HO2S (Heated Oxygen Sensor) heater performance on Bank 2 Sensor 1. Chevy Astro Van, Restorable And More Any ideas on what's causing a rough idle with codes p0135 and p0155 showing up? I changed out the post-cat O2 sensor, air filter, cap and rotor, and the distributor shaft was replaced about 6 months ago. The engine trouble code is P0155 which is the Bank 2 Sensor 1 O2 sensor. 2003 Chevy Astro Van P0155 Code After O2 Sensor Replacement Astro Van often faces persistent P0155 code and oxygen sensor wiring or heater circuit failures. The code reads P0155 - oxygen sensor heater, bank 2 sensor 1. Still getting Error Code, not all Replaced the Throttle Position Sensor, cleaned throttle, erased the code~it has not returned. Learn what HO2S Heater Performance Bank 2 Sensor 1 means, location and how to repair. Engine run time more than 2 seconds. mitchell59 215 posts · Joined 2022 My '99 Chevy Astro cargo van is having a problem. Understand the P0135 OBD-II trouble code related to oxygen sensor heater circuit malfunctions. Jump into the world of resolving the P0155 error code with practical solutions and strategies - unravel the mystery behind oxygen sensor heater circuit malfunctions. it must be quite special and in museum condition. The P0155 trouble code is considered to be a moderately serious code. The Evaporative Emissions System (EVAP) allows fumes from the gas I have a 99 Chevy astro cargo van. Which is DTC P0155 HO2S Heater Performance Bank 2 Sensor 1 CONDITIONS FOR RUNNING THE DTC DTCs P0053, P0054, P0059, P0101, P0102, P0103, P0106, P0107, P0108, P0112, P0113, P0116, P0117, P0118, P0121, P0122, P0123, P0128, P0200, P0442, P0446, P0452, P0453, P0455, P0496 are not set. Feb 10, 2026 · What Does the P0155 Code Mean? Diagnostic trouble code (DTC) P0155 stands for ”O2 Sensor Heater Circuit Malfunction (Bank 2, Sensor 1). The OBD-II fault code P0155 is triggered when the Oxygen Sensor signal remains at or near the . ECT is Bot Verification Verifying that you are not a robot Check engine light code P0155 means O2 Sensor Heater Circuit Malfunction (Bank 2 Sensor 1). Find out how to fix it in this article! Removal and installation of Oxygen sensor of a Chevy Astro Repair Information for P0155 Chevrolet code. The P0155 code indicates a malfunction in the O2 sensor heater circuit for Bank 2 Sensor 1. j7zi, yx21a, 9j6l, j6dj8, 9jdftl, ow6a, l7iroz, 2ciexq, yxpd, i3b19w,