P0192 on 2017-2022 Honda CR-V 1.5T: Causes and Fixes for Fuel Rail Pressure Sensor Circuit Low

What's Unique About the 2017-2022 Honda CR-V

The 2017-2022 CR-V uses the 1.5L Turbo (L15B7) direct-injection engine, which has a complex high-pressure fuel system operating up to 200 bar (nearly 2900 PSI). While this engine platform is known for several fuel system issues like high-pressure pump failures (often causing P0088) and a major recall on the low-pressure pump (causing P0087), the P0192 code specifically points to an electrical fault. It's crucial for owners not to confuse this electrical code with the more widely discussed mechanical pump failures, as the diagnostic path is different. The first step for P0192 is always to investigate the sensor and its circuit, not to immediately suspect the expensive fuel pumps.

Symptoms You May Notice

• Check Engine Light is on
• Engine hesitation or stumbling during acceleration
• Difficulty starting the engine or extended cranking time
• Rough or unstable idle
• Reduced engine power and acceleration (limp mode)
• Decreased fuel economy
• Engine may stall, especially at low speeds or idle

Most Likely Causes

1. Faulty Fuel Rail Pressure (FRP) Sensor 🔴 High Probability The FRP sensor is an electronic component that can fail internally, often developing a short to ground. This causes it to send a persistent low voltage signal (below 0.3V) to the PCM, regardless of actual fuel pressure.
   How to confirm: Using a scan tool, monitor the live data for 'Fuel Rail Pressure Sensor Voltage'. With the Key On, Engine Off (KOEO), the voltage should be approximately 0.5V. If the reading is near zero or significantly below 0.5V, disconnect the sensor. If the voltage on the scan tool jumps to 5V, the sensor is shorted internally and is faulty.
   Typical fix: Replace the Fuel Rail Pressure sensor. It is located on the engine's high-pressure fuel rail. The OEM part number is reported to be 37890-6A0-A01.
   Est. part cost: $80-$200
2. Wiring or Connector Issue 🟡 Medium Probability The wiring harness in the engine bay is exposed to heat and vibration, which can lead to chafed wires creating a short to ground, loose connections, or corrosion in the sensor's 3-pin connector over time.
   How to confirm: Visually inspect the wiring harness and 3-pin connector going to the FRP sensor for any signs of damage, melting, or corrosion. Use a multimeter to test the connector (with sensor unplugged, KOEO). Pin 3 to Pin 2 should show ~5V (reference voltage). Pin 3 should have continuity to ground. If the 5V reference is missing or the ground is bad, trace the wiring back to the PCM. A short to ground can be confirmed by checking for continuity between the signal wire (Pin 1) and the body ground.
   Typical fix: Repair the damaged section of the wiring harness or clean/replace the sensor connector. Apply dielectric grease to the new connector to prevent future moisture intrusion.
   Est. part cost: $10-$50

Rare But Worth Checking

• Faulty Powertrain Control Module (PCM): This is extremely rare and should only be considered after the FRP sensor and all related wiring have been thoroughly tested and confirmed to be in good working order. The internal circuit that reads the sensor's voltage can fail, but this is a last resort diagnosis.

Diagnosis Steps

1. Connect an OBD-II scanner and confirm P0192 is the primary code. Record any freeze-frame data.
2. Using the scanner's live data, monitor 'Fuel Rail Pressure Sensor' voltage (KOEO). A normal reading is ~0.5V. A reading near 0V or below 0.31V confirms the low circuit fault.
3. Turn the ignition off and locate the FRP sensor on the high-pressure fuel rail.
4. Visually inspect the sensor's connector and wiring for damage, corrosion, or loose pins.
5. Disconnect the sensor. Turn ignition to KOEO. Use a multimeter on the harness-side connector. Check for ~5V reference between terminals 2 and 3. Check for continuity to ground on terminal 3.
6. If 5V reference or ground is missing, there is a wiring issue between the connector and the PCM that must be traced.
7. If reference and ground are present, the issue is likely the sensor itself or a short in the signal wire (terminal 1). Check for continuity between terminal 1 and a good chassis ground. If continuity exists, the signal wire is shorted to ground.
8. If the wiring is good, replace the Fuel Rail Pressure Sensor.
9. After repair, clear codes and perform a test drive to ensure the code does not return.
10. If the code persists after replacing the sensor and verifying the wiring, a PCM fault is possible but highly unlikely.

Parts You'll Likely Need

• Fuel Rail Pressure Sensor (OEM #37890-6A0-A01) — This is the most common cause of P0192, as the sensor can fail internally and send a false low voltage signal.
  Trusted brands: Honda (Genuine OEM), Bosch, Denso, Standard Motor Products
  OEM price range: $120-$200
  Aftermarket price range: $70-$150

Platform-Specific Known Issues

• While not directly causing P0192, this vehicle platform was subject to a major safety recall (NHTSA #21V-215, #23V-858) for the in-tank low-pressure fuel pump, which typically causes a P0087 code. It is worth checking if the vehicle has had this recall service performed to ensure overall fuel system health.

Mechanic-Grade Diagnostic Values

• FRP Sensor Voltage (Key On, Engine Off) — expected: ~0.5V. Failure: A reading near 0V or significantly below 0.5V suggests a short to ground or internal sensor failure.
• FRP Sensor Voltage (Engine at Idle) — expected: ~1.3V - 1.8V. Failure: Voltage is static, near 0V, or does not respond to changes in engine RPM.
• PCM Fault Trigger Threshold (FRP Voltage) — expected: Above 0.31V. Failure: A reading below 0.31V for a specified time will set the P0192 DTC.
• FRP Sensor 5V Reference at Harness Connector — expected: 4.8V - 5.2V. Failure: 0V indicates an open/short in the reference circuit; voltage significantly above 5.2V may indicate a PCM fault.
• High-Pressure Fuel System (Contextual) — expected: ~500-600 PSI at idle; 2,000-3,000+ PSI under load.. Failure: While P0192 is electrical, these are the pressures the sensor should be reporting. A sensor stuck at 0V is inconsistent with a running engine.

Hidden / Shadow Codes Worth Checking

• On-Board Snapshot Data: Honda's HDS does not typically use proprietary 'shadow codes' for this fault. Instead, it captures a detailed 'On-Board Snapshot' or 'Freeze Frame' of all engine parameters at the exact moment the P0192 fault was detected. This data is more valuable than a sub-code for diagnosis. (see via Honda Diagnostic System (HDS) or equivalent professional scan tool.)

Scan Tool Commands That Help

• Honda Diagnostic System (HDS): Data List > Fuel Pressure (converted from sensor) — This is the primary live data parameter to monitor. It is used to confirm if the sensor voltage is below the 0.31V threshold, which is the first step in the official diagnostic procedure.
• Honda Diagnostic System (HDS): Jumping SCS Line — Mentioned as part of a specific diagnostic tree for checking for shorts in the signal wire after disconnecting the PCM connector. This is an advanced, dealer-level procedure.

Wiring & Ground Locations

• PCM Connector C, Pin 41 — This is a pin on one of the main connectors to the Powertrain Control Module (PCM).. According to service procedures, this specific pin provides the VCC1 (5V reference) voltage to the FRP sensor. A continuity check between this pin and Terminal 3 of the sensor connector is used to verify the integrity of the 5V reference wire.
• FRP Sensor Connector Terminals — On the 3-pin connector at the Fuel Rail Pressure sensor itself.. Terminal 1 is the signal wire, Terminal 2 is typically the 5V reference, and Terminal 3 is the ground. Testing for a short between Terminal 1 and chassis ground is a key step to identify a grounded signal wire.

OEM Part Supersession History

• 37890-6A0-A01 → No supersession found. — The part number appears to be stable for the specified vehicle range.

Model Year Variations Within This Range

• 2017-2022: While the platform had a facelift in 2020 and known issues like oil dilution were more prevalent in early years (2017-2019), the core 1.5T engine (L15B7) and its high-pressure fuel system components, including the FRP sensor and its wiring, remained fundamentally the same. The diagnostic procedure for P0192 is consistent across all model years in this range.

Diagnostic Flowchart

Other Known Issues on This Vehicle

Issues unrelated to this code that are worth knowing about as an owner of this generation:

• Engine Oil Dilution 🔴 High — Common on 2017-2018 models, especially in cold climates with short-trip driving. Less frequent on later models after software updates. (Ref: Honda issued software updates and extended warranties in some regions to address the issue, which aims to warm the engine faster to evaporate fuel from the oil.)
• Parasitic Battery Drain 🟠 Medium — Widespread issue where the battery dies after the vehicle sits for a few days. Often traced to software logic in the VSA modulator or PCM. (Ref: Honda TSB A19-039 and TSB 17-032 address software updates to fix modules that fail to 'sleep' correctly.)
• Infotainment System Glitches 🟡 Low — Frequently reported problems include the screen freezing, going black, phantom beeping, or making random inputs. (Ref: Honda TSB A19-066 provides a software update to fix these glitches. A simple system reboot (holding the power/volume knob) can provide a temporary fix.)
• Leaking Fuel Injectors / Cold Start Misfire 🟠 Medium — Some owners report rough running and misfires on a cold start, sometimes attributed to leaking direct injectors.
• A/C Condenser Leaks 🟠 Medium — A known defect in the A/C condenser can lead to leaks and loss of cooling. Honda extended the warranty for this specific part on many models. (Ref: Warranty Extension for A/C Condensers.)

Used vs. New Parts: Buying Guide for This Vehicle

When a used part is the smart pick: A used part is a smart choice for the sensor's wiring connector pigtail if the original is damaged or corroded. It is a low-cost, effective fix.

Donor-vehicle mileage cap: roughly under 80000 miles for the part to have meaningful remaining life.

What to inspect on the donor part:

• For a used sensor: ensure connector pins are clean, straight, and free of any green or white corrosion. The plastic housing should be free of cracks.
• For a wiring pigtail: inspect for at least 6 inches of flexible, non-brittle wire. Avoid any connectors with signs of melting or heat stress.

OEM-only on this vehicle (don't cheap out):

• Fuel Rail Pressure Sensor: While aftermarket options exist, this is a critical sensor for engine operation. Using a Genuine Honda, Denso, or Bosch sensor is strongly recommended to avoid premature failure, inaccurate readings, or compatibility issues that are common with no-name online brands.

Aftermarket brands forum-validated for this vehicle:

• Bosch
• Denso
• Standard Motor Products (SMP)

Brands owners have reported issues with on this vehicle:

• Unbranded, low-cost sensors from online marketplaces, which are frequently cited in forums as having high failure rates.

Real Owner Stories

Aggregated from forums and TSBs cited above. Mileages and costs reflect what owners reported in those sources.

Related OBD-II Codes

• P0087 — This code refers to low fuel rail pressure and is frequently associated with the major NHTSA recalls (#21V-215, #23V-858) for the in-tank low-pressure fuel pump on this vehicle platform.
• P0193 — The high-circuit counterpart to P0192, involving the same Fuel Rail Pressure sensor and wiring harness.
• P0300 — Random or cold-start misfires can occur on this platform due to leaking direct fuel injectors, which share the same high-pressure fuel rail system as the FRP sensor.

Frequently Asked Questions